Mathematics – Chapter 26 Coordinate Geometry

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Physics – Chapter 10 Magnetism

• Q1. ‘Induced magnetism is temporary’. Comment on this statement.
• Q2. ‘Induction precedes attraction’. Explain the statement.
• Q3. State four properties of magnetic field lines.
• Q4. Can two magnetic field lines intersect each other? Give reason to your answer.

Physics – Chapter 10 Magnetism

• Q1. What is an artificial magnet? State two reasons why do we need artificial magnets?
• Q2. How will you test whether a given rod is made of iron or copper?
• Q3. Explain the term induced magnetism.
• Q4. Explain the following: When two pins are hung by their heads from the same pole of a magnet, their pointed ends move apart.

Physics – Chapter 10 Magnetism

• Q1. What kind of magnetic field is represented by parallel and equidistant lines ?
• Q2. What is the angle between the magnetic axis of the earth and the axis of rotation of the earth ?
• Q3. What is a lodestone?

Physics – Chapter 10 Magnetism

• Q1. Which of the following is not a correct statement for a magnet placed in the earth’s magnetic field ?
  • Neutral points are always at an equal distance from the magnet.
  • The position of neutral points depends on the direction of the magnet in the earth’s magnetic field.
  • The position of neutral points does not depend on the direction of the magnet.
  • The magnetic field strength is zero at the neutral points.
• Q2. Fill in the blanks to complete the sentences:
  • (a) Two ends of a magnet are called ……………
  • (b) Unlike poles of a magnet …………… each other.
  • (c) Like poles of a magnet …………… each other.
  • (d) A freely suspended magnet rests in the geographic …………… direction.

Physics – Chapter 10 Magnetism

• Q1. In a uniform magnetic field, the field lines are:
  • curved
  • parallel and equidistant straight lines
  • parallel, but non-equispaced straight lines
  • nothing can be said.
• Q2. The magnetic field lines in a non-uniform magnetic field are :
  • either converging or diverging
  • parallel and equispaced
  • only converging
  • only diverging
• Q3. The magnetic field lines of the earth are …………… to the earth’s surface near the magnetic poles and …………… to the earth’s surface near the magnetic equator.
  • parallel, normal
  • normal, parallel
  • normal, normal
  • parallel, parallel
• Q4. A soft iron bar is tied by a thread in the middle and is suspended from a rigid support such that it is free to rotate in a horizontal plane. It shall come to rest :
  • along north-south direction
  • along east-west direction
  • equally inclined to N-S and E-W direction
  • in any direction

Physics – Chapter 10 Magnetism

• Q1. The first known magnets were pieces of :
  • bauxite
  • lodestone
  • limestone
  • None of the above
• Q2. If a magnet is suspended with a silk thread such that it is free to rotate in a horizontal plane, it sets itself always pointing in the :
  • geographic east-west direction
  • magnetic east-west direction
  • geographic north-south direction
  • None of the above
• Q3. The …………… magnetism acquired by a magnetic material when it is kept near a magnet is called …………… magnetism.
  • temporary, induced
  • permanent, induced
  • temporary, permanent
  • None of the above
• Q4. Two like magnetic poles:
  • repel each other
  • attract each other
  • first attract each other, then repel
  • neither attract nor repel.

Physics – Chapter 9 Current Electricity

• Q1. An instrument used to measure the magnitude of current flowing in a circuit is :
• Q2. A …………… is either used to detect the presence of a weak current or to only know the direction of flow of current in a circuit.
• Q3. What is an electric cell?
• Q4. What transformation of energy takes place when current is drawn from a cell?

Physics – Chapter 9 Current Electricity

• Q1. State whether the current is a scalar or vector? What does the direction of current convey?
• Q2. State whether the potential is a scalar or vector? What does the positive and negative sign of potential convey?

Physics – Chapter 9 Current Electricity

• Q1. How is the electric potential difference between the two points defined? State its S.I. unit.
• Q2. Explain the statement ‘the potential difference between two points is 1 volt.

Physics – Chapter 9 Current Electricity

• Q1. Define the term current and state its S.I. unit.
• Q2. Define the term electric potential. State its S.I. unit.

Mathematics – Chapter 23 Trigonometrical Ratios of Standard Angles

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Mathematics – Chapter 23 Trigonometrical Ratios of Standard Angles

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Mathematics – Chapter 22 Trigonometrical Ratios

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Mathematics – Chapter 23 Trigonometrical Ratios of Standard Angles

• Q1. In a right-angled triangle ABC, right-angled at B, AB = 12 cm and BC = 5 cm. Calculate:
  • sin A
  • cos A
  • tan A
• Q2. Triangle DEF is right-angled at D. If DE = 8 cm and DF = 6 cm, find:
  • cos E
  • cosec E
  • cot E
• Q3. In right triangle PQR, right-angled at Q, PQ = 10 cm and PR = 25 cm. Determine:
  • sec R
  • sin P
  • tan P
• Q4. Triangle XYZ is right-angled at Y. Given XZ = 15 cm and YZ = √30 cm, calculate:
  • sin X
  • cos X
  • cosec X
• Q5. In a right-angled triangle ABC, right-angled at B, AC = 13 cm and BC = 12 cm. Determine:
  • tan C
  • cot C
  • cos C

Mathematics – Chapter 18 Statistics

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Mathematics – Chapter 19 Mean and Median

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Biology – Chapter 14 The Respiratory System

• Q1. How do the following contribute in inspiration during breathing?
  • Ribs
  • Diaphragm
• Q2. Give reasons for:
  • People climbing to high altitudes may suffer from dizziness and unsteady vision.
  • Lime water is used in most experiments on respiration.
  • Respiration rate is higher in animals than in plants.
• Q3. Name the following :
  • (a) The energy currency of the cell.
  • (b) The compound formed by the combination of oxygen and haemoglobin.
  • (c) The common passage of Oesophagus and Trachea.
  • (d) The muscles found between the ribs which can change the size of the chest cavity lengthwise.
  • (e) The compound formed by the combination of haemoglobin and carbon dioxide gas.
• Q4. Name the body structure concerned with the given functional activity:
  • (a) Prevents food from entering the trachea during swallowing.
  • (b) Transports oxygen to the body cells.
  • (c) Helps to increase the volume of the chest activity lengthwise.
  • (d) Combines with the oxygen in the lungs.
  • (e) Protects the lungs from mechanical injuries.
  • (f) Provides actual diffusion of respiratory gases in lungs.

Biology – Chapter 19 Waste Generation and Management

• Q1. Define electronic waste and list at least six items which come under this category. 
• Q2. List some of the common wastes produced in mining operation and mention how these can be reused.
• Q3. Describe the procedure on how compost is usually produced.
• Q4. Describe the usefulness of incineration of wastes, and also mention the precautions required in it.

Mathematics – Chapter 19 Mean and Median

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Happy Republic Day!

Mathematics – Chapter 22 Trigonometrical Ratios

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Biology – Chapter 13 Skin: The Jack of all trades

• Q1. Name the principal body heat regulating centre in our brain.
• Q2. Name any one modified sweat gland and any one modified sebaceous gland.
• Q3. Name the skin glands which when inflamed cause acne.
• Q4. State any two functions of the mammalian skin other than those concerned with heat regulation.
• Q5. How does our skin provide protection to our body against the following?
  • Entry of germs
  • Excessive loss of heat in severe cold
  • Entry of harmful ultra-violet rays.
• Q6. Explain the terms “vasodilation” and “vasoconstriction”. How do these processes contribute in the regulation of the body temperature?

Biology – Chapter 11 Digestive system

• Q1. Given below is a jumbled sequence of the different parts of the human alimentary canal. Rewrite them in correct sequence.
  • Stomach, Oesophagus, Large intestine, Small intestine, Pharynx.
• Q2. Give the technical names for the following types of teeth in humans (on each side, in each jaw)
  • The three last grinders.
  • The pointed tooth for holding and tearing.
  • The broad sharp cutting teeth.
  • The two temporary (deciduous) grinding teeth.
• Q3. Name the following parts of a tooth :
  • Part exposed above the gum.
  • The hard substance making the covering of the tooth.
  • The soft connective tissue contained in the central space of the tooth.
  • Bone-like structure fixing the root in position.
  • Slight constriction between the root and the crown.
• Q4. Name the following :
  • The three subdivisions of the small intestine.
  • The three subdivisions of the large intestine.
• Q5. Name the enzyme which digests :
  • starch in the mouth
  • fats in the ileum
  • protein in duodenum
  • sucrose in the ileum

Chemistry – Chapter 3 Water

• Q1. What is the importance of dissolved salts in water?
• Q2. State the importance of the solubility of CO2, and O2 in water.
• Q3. How is air dissolved in water different from ordinary air?
• Q4. Explain why:
  • (a) Boiled or distilled water tastes flat.
  • (b) Ice at zero degree centigrade has greater cooling effect than water at 0°C.
  • (c) Burns caused by steam are more severe than burns caused by boiling water.
  • (d) Rivers and lakes do not freeze easily?
  • (e) Air dissolved in water contains a higher proportion of oxygen.
  • (f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
  • (g) Rain water does not leave behind concentric rings when boiled.
• Q5. Explain why hot saturated solution of potassium nitrate forms crystals as it cools.
• Q6. Give three factors which affect the solubility of a solid solute in a solvent.
• Q7. (a) Define
  • (i) Henry’s law
  • (ii) Crystallization
  • (iii) Seeding
  • (b) State any three methods of crystallization.

Chemistry – Chapter 1 The Language of Chemistry

• Q1. The correct formula of aluminium oxide is
  • AlO3
  • AlO2
  • Al2O3
  • Al3O2  
• Q2. Select the basic and acidic radicals in the following compounds.
  • (a) MgSO4
  • (b) (NH4)2SO4
  • (c) Al2(SO4)3
  • (d) ZnCO3
• Q3. Write the chemical names of the following compounds :
  • (a) Ca3(PO4)2
  • (b) K2CO3
  • (c) K2MnO4
  • (d) Mn3(BO3)2
  • (e) Mg(HCO3)2
  • (f) Na4Fe(CN)6
  • (g) Ba(ClO3)2
  • (h) Ag2SO3
  • (i) (CH3COO)2Pb
  • (j) Na2SiO3
• Q4. Give the names of the following compounds.
  • (a) KClO
  • (b) KClO2
  • (c) KClO3

(d) KClO4

Chemistry – Chapter 6 Study of the first Element Hydrogen

• Q1. Write balanced equations and give your observations when the following metals react:
  • (i) Sodium with cold water
  • (ii) Calcium with cold water
  • (iii) Magnesium with boiling water
  • (iv) Magnesium with steam.
• Q2. 
  • (i) Under what conditions iron reacts with water?
  • (ii) Give the balanced equation of the reaction.
  • (iii) What is noticed if the products are not allowed to escape?
• Q3. From the knowledge of activity series, name a metal which shows the following properties:
  • (i) It reacts readily with cold water
  • (ii) It displaces hydrogen from hot water
  • (iii) It displaces hydrogen from dilute HCl
  • (iv) It forms a base which is insoluble in water.
• Q4. Why is nitric acid not used in the preparation of hydrogen?

Chemistry – Chapter 7 Study of Gas laws

• Q1. Write the value of
  • a) Standard temperature in
    • i) °C
    •  ii) K
  • b) Standard pressure in
    • i) atm 
    • ii) mmHg 
    • iii) cm Hg 
    • iv) torr
• Q2. What is the relationship between the Celsius and the Kelvin scales of temperature?
• Q3. Give reasons for the following
  • All temperatures in the absolute (Kelvin) scale are in positive figures.
  • Gases have a lower density compared to that of solids or liquids.
  • Gases exert pressure in all directions.
  • It is necessary to specify the pressure and temperature of gas while stating its volume.
  • The inflating balloon seems to violate Boyle’s law.
  • Mountaineers carry oxygen cylinders with them.
  • Gas fills completely the vessel in which it is kept.
• Q4. How did Charles’s law lead to the concept of an absolute scale of temperature?

Biology – Chapter 12 Skeleton: Movement and Locomotion

• Q1. Fill in the blanks
  • Our skeleton consists of bones, …………… and ……………
  • …………… is the chief component of our skeleton.
  • Shapewise the bones can be classified as …………… , …………… , …………… and …………… .
  • The central hollow part of the long bones is known as …………… .
  • A bone becomes soft and flexible when placed in dilute …………… .
• Q2. Mention if the following statements are true (T) or false (F)
  • Humerus of the upper arm is the longest bone.
  • Axial skeleton includes shoulder and hip girdles.
  • There are 10 vertebrae in the neck.
  • There are three kinds of ribs – true, false and floating.
  • The shoulder girdle is large and trough-shaped.
• Q3. Branched muscles are :
  • Striped
  • Cardiac
  • Unstriped
  • Both (i) and (ii)
• Q4. Involuntary muscles are present in :
  • Leg
  • Hand
  • Iris
  • Head
• Q5. Name the parts of the skeleton where the following are located: 
  • Transverse process, 
  • glenoid cavity, 
  • shoulder-blade, 
  • acetabulum.
• Q6. Name:
  • (a) Three main constituents of the human skeleton.
  • (b) Two main divisions of the human skeleton.
  • (c) Four parts of Axial skeleton.
  • (d) Five regions of vertebral column.
  • (e) Four kinds of freely movable joints.

Biology – Chapter 15 Hygiene: [A key to Healthy Life]

• Q1. Fill in the blanks.
  • (a) Cleanliness, rest and sleep, and physical exercise are a part of …………… hygiene.
  • (b) One must always breathe by the …………… and never by the …………… .
  • (c) Fresh air brings …………… into the living rooms.
  • (d) One must never put a sharp pointed object into the ……………, it may rupture the …………… .
  • (e) For adults 6-7 hours of continuous undisturbed …………… is sufficient.
  • (f) The municipal bodies must ensure the supply of clean germ-free …………… and an efficient …………… disposal.
• Q2. No urination due to shortage of water in the body is a typical symptom of
  • Typhoid
  • Malaria
  • Dysentery
  • Cholera
• Q3. The protozoan that causes malaria is:
  • Entamoeba histolytica
  • Euglena
  • Paramecium
  • Plasmodium
• Q4. The chemical substance mainly responsible for tooth disorders is
  • Calcium
  • Chloride
  • Fluorides
  • Iodides
• Q5. Which of the following is an agent that acts as an intermediate carrier of a pathogen?
  • Genes
  • Water
  • Vector
  • None of these
• Q6. Fill in the blanks:
  • (a) Taking stimulants and …………… are unhealthy habits.
  • (b) Physical exercise should be …………… and regular.
  • (c) Public drains and garbage must be covered with …………… powder or lime.
  • (d) …………… is often designated as public enemy no. 1.
  • (e) …………… is a parasite which lives on rat’s skin.
• Q7. Name the following :
  • (a) The bacterium which causes cholera.
  • (b) The liquid domestic wastes from the kitchen, toilet, etc.
  • (c) The chemical substances used to kill rats.
  • (d) The disease caused due to the inflammation of liver.
  • (e) The disease caused due to the bacilli bacteria released in tannery wastes from leather industries.

Biology – Chapter 13 Skin: The Jack of all trades

• Q1. What is the difference between leucoderma and albinism?
• Q2. Name any two glands found in the human skin. State their functions.
• Q3. Explain the terms “vasodilation” and “vasoconstriction”. How do these processes contribute in the regulation of the body temperature?
• Q4. How does our skin provide protection to our body against the following?
  • Entry of germs
  • Excessive loss of heat in severe cold
  • Entry of harmful ultra-violet rays.

Physics – Chapter 7 Reflection of light

• Q1. The angle which the …………… ray makes with the …………… at the point of incidence is called angle of incidence.
  • reflected, mirror
  • incidence, mirror
  • incidence, normal
  • reflected, normal
• Q2. The plane containing the incident ray and normal is called :
  • plane of reflection
  • normal plane
  • plane of incidence
  • none of the above
• Q3. For a ray incident normally on a plane mirror, the angle of incidence is :
  • 90°
  • 45°
  • 30°
  • 0°
• Q4. The perpendicular drawn on the surface at the point of incidence is called :
  • normal
  • incident ray
  • reflected ray
  • none of the above
• Q5. A light ray is incident normally on a plane mirror.
  • (a) What is its angle of incidence?
  • (b) What is the direction of reflected ray? Show it on a diagram.
• Q6. A light ray strikes a mirror and retraces its path. What is the angle of incidence and angle of reflection ?
• Q7. State the two laws of reflection of light.
• Q8. 
  • (a) Write three characteristics of image formed by a plane mirror?
  • (b) How is the position of the image related to the position of the object?

Physics – Chapter 5 Upthrust in Fluids, Archimedes’ Principle and Floatation

• Q1. What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
• Q2. A body of volume 100 cm3 weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 x 103 kg m-3. Find (i) the upthrust due to liquid and (ii) the weight of the body in liquid.
• Q3. A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
  • (i) the volume of the body,
  • (ii) the loss in weight of the body, and
  • (iii) the upthrust on the body.
  • State the assumption made in part (i).
• Q4. The unit of relative density is:
  • g cm-3
  • kg m-3
  • m3 kg-1
  • no unit
• Q5. What are the units of density in 
  • (i) C.G.S. and 
  • (ii) S.I. system.
• Q6. Express the relationship between the C.G.S. and S.I. units of density.

Physics – Chapter 1 Measurement and Experimentation

• Q1. Which of the following unit is equivalent to watt?
  • Volt x Ampere
  • Volt/Ampere
  • Ampere/Volt
  • Ohm
• Q2. Which one of the following is a derived unit?
  • Metre
  • Kelvin
  • Metre3
  • Mole
• Q3. Which of the following is the smallest unit?
  • Millimetre
  • Angstrom
  • Fermi
  • Metre
• Q4. What do you understand by the term unit?
• Q5. How is nanometer related to Angstrom?
• Q6. Write the derived units of the following —
  • Speed
  • Force
  • Work
  • Pressure
• Q7. Name the three convenient units used to measure length ranging from very short to very long value. How are they related to the S.I. unit ?

Physics – Chapter 2 Motion in one dimension

• Q1. The unit of retardation is —
• Q2. 18 km h-1 is equal to — in ms-1
• Q3. The value of g does not depend on the:
  • Height of the body
  • Mass of the body
  • Shape of the body
  • All of these
• Q4. State whether the following quantity is a scalar or vector?
  • (a) Pressure
  • (b) Force
  • (c) Momentum
  • (d) Energy
  • (e) Weight
  • (f) Speed
• Q5. Define displacement. State its unit.
• Q6. Define acceleration. State its S.I. unit.

Physics – Chapter 5 – Upthrust in Fluids, Archimedes’ Principle and Floatation

• Q1. The S.I. unit of upthrust is:
  • Pa
  • N
  • kg
  • kg m²
• Q2. The correct relation for upthrust on a solid of volume V immersed in a liquid of density ρ is :
  • FB = VsggVs​​
  • Fg = ρgVVρg​
  • FB = Vρg
  • Fg = VgρρVg​​
• Q3. A body of volume 100 cm3 weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 x 103 kg m-3. Find (i) the upthrust due to liquid and (ii) the weight of the body in liquid.
• Q4. A solid of density 5000 kg m-3 weighs 0.5 kgf in air. It is completely immersed in water of density 1000 kg m-3. Calculate the apparent weight of the solid in water.
• Q5. The unit of relative density is:
  • g cm-3
  • kg m-3
  • m3 kg-1
  • no unit
• Q6. Write the density of water at 4°C in S.I. unit.
• Q7. Complete the following sentences —
  • (i) Mass = ………. x density
  • (ii) S.I. unit of density is ……….
  • (iii) Density of water is ………. kg m-3
  • (iv) Density in kg m-3 = ………. x density in g cm-3

Chemistry – Chapter 3 – Water

• Q1. Water exists in all the three states. Discuss.
• Q2. ‘Water is a universal solvent’. Comment.
• Q3. Density of water varies with temperature. What are its consequences?
• Q4. What is the effect of impurities present in water on melting point and boiling point of water?
• Q5. Give reasons: 
  • (a) Boiled or distilled water tastes flat.
  • (b) Ice at zero degree centigrade has greater cooling effect than water at 0°C.
  • (c) Burns caused by steam are more severe than burns caused by boiling water.
  • (d) Rivers and lakes do not freeze easily?
  • (e) Air dissolved in water contains a higher proportion of oxygen.
  • (f) If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
  • (g) Rain water does not leave behind concentric rings when boiled.

Chemistry – Chapter 7 Study of Gas laws

• Q1. Explain Boyle’s law on the basis of the kinetic theory of matter.
• Q2. The molecular theory states that the pressure exerted by a gas in closed vessel results from the gas molecules striking’ against the walls of the vessel. How will the pressure change if :
  • (a) the temperature is doubled keeping the volume constant
  • (b) the volume is made half of its original value keeping the temperature constant?
• Q3. Explain Charles’s law on the basis of the kinetic theory of matter.
• Q4. Define absolute zero and absolute scale of temperature. Write about the relationship between °C and K.

Chemistry – Chapter 7 Study of Gas laws

• Q1. What do you understand by gas?
• Q2. Give the assumptions of the kinetic molecular theory
•  
• Q3. State 
  • (i) the three variables for gas laws 
  • ii) S.I units of these variables.
• Q4. Answer the following:
  • (a) State Boyle’s Law.
  • (b) Give its
    • (i) mathematical expression,
    • (ii) graphical representation and
    • (iii) significance.

Chemistry – Chapter 6 – Study of the first Element Hydrogen

• Q1. Justify the position of Hydrogen in the periodic table.
• Q2. Compare hydrogen with alkali metals on the basis of :
  • (i) Ion formation
  • (ii) Reducing power
  • (iii) Reaction with oxygen
  • (iv) Oxide formation
• Q3. In what respect does hydrogen differ from
  • (i) Alkali metals
  • (ii) Halogens
• Q4. Give the general group study of hydrogen with reference to:
  • (i) valence electrons
  • (ii) burning
  • (iii) reducing power.
• Q5. Which metal is preferred for the preparation of hydrogen
  • (i) from water?
  • (ii) from acid?
• Q6. Answer the following:
  • (i) Write the reaction of steam with red hot iron.
  • (ii) Why is this reaction considered a reversible reaction?
  • (iii) How can the reaction proceed continuously?

Biology – Chapter 6 Seeds: Structure and Germination

• Q1. Mention whether the following statements are True (T) or False (F). Give the correct statement if false.
  1. Plumule is the future root and radicle is the future shoot of the plant.
  2. Micropyle serves for the emergence of the radicle.
  3. Cotyledons in castor are a big store of food for the embryo.
  4. Maize grain has a large endosperm.
  5. Tegmen is the outermost layer of the seed.
• Q2. Fill in the blanks by choosing the correct alternative
  1. In a dry seed, the embryo is in …………… state. (active/quiescent)
  2. Water is absorbed by the seed mainly through …………… . (entire surface/micropyle)
  3. Very low temperature …………… the growth of embryo. (inhibits/destroys)
  4. Germination in Pea is …………… . (epigeal/hypogeal)
  5. Coleoptile is a part found in the germinating …………… . (castor/maize)
  6. Alkaline pyrogallic acid is used for absorbing …………… during experiments on germination. (oxygen/carbon dioxide)
• Q3. Correct the following false statements by changing the first/last word only.
  1. Plumule develops into the root system.
  2. Testa is the thin inner layer of the seed coat.
  3. Endothelium separates the endosperm and embryonic region in the maize grain.
  4. Hypocotyl elongates faster in hypogeal germination.
  5. Germination is the period of rest in a seed.
• Q4. Name the following:
  1. A monocotyledonous endospermic seed.
  2. A chemical used in experiments which absorbs oxygen.
  3. Part of the plumule above the embryonic axis of the seed.
  4. A plant which shows viviparous germination.
  5. The layer of endosperm of maize rich in protein.
  6. A seed with folded plumule leaves.

Biology – Ch 04 – The Flower

• Q1. The part of the flower that gives rise to the seed is
• Q2. Which part of the pistil serves as the landing place for pollen grains?
• Q3. Perianth is the collective term for a group of:
• Q4. The condition of androecium, when, all the stamens are free from each other is termed as?
• Q5. Answer the following:
  • Four whorls of the flower
  • Two types of unisexual flowers
  • Two main parts of a Stamen
  • Three main parts of a Pistil
  • Three types of stamens on the basis of their cohesion.

Chemistry – Chapter 4 Atomic Structure and Chemical Bonding

• Q1. What is the contribution of the following in Atomic structure?
  • (a) Maharshi Kanada
  • (b) Democritus?
• Q2. State Dalton’s atomic theory.
• Q3. What are the cathode rays? How are these rays formed?
• Q4. Why were anode rays also called as ‘canal rays’?
• Q5. State one observation which shows that atom is not indivisible.
• Q6. 
  • (a) Name an element which does not contain neutron.
  • (b) If an atom contains one electron and one proton, will it carry any charge or not?

Physics – Chapter 2 –  Motion in one dimension

• Q1. Physical quantities which are expressed only by their magnitude are :
  • Scalar quantities
  • Vector quantities
  • Tensor quantities
  • None of these.
• Q2. Which of the following is a scalar quantity?
  • Force
  • Time
  • Acceleration
  • Displacement
• Q3. The S.I. unit of displacement is:
  • Centimetre
  • Millimetre
  • Decimetre
  • Metre
• Q4. The distance travelled by a body in 10 s when it travels with a uniform speed of 10 ms-1 is:
  • 100 m
  • 1 m
  • 20 m
  • 50 m
• Q5. For a particle in motion, which of the following quantity can be zero at any given instant?
  • Displacement
  • Distance
  • Speed
  • None of these
• Q6. A body when projected up with an initial velocity u goes to a maximum height h in time t and then comes back at the point of projection. The correct statement is —
  • The average velocity is 2h/t
  • The acceleration is zero
  • The final velocity on reaching the point of projection is 2u
  • The displacement is zero

Physics – Ch 05 – Upthrust in Fluids, Archimedes’ Principle and Floatation

• Q1. Sinking of an iron nail in water implies that :
  • the density of nail is more than the density of water
  • the density of nail is less than the density of water
  • the density of nail is equal to the density of water
  • the sinking of nail does not depend upon the density of water
• Q2. Define upthrust and state its S.I. unit.
• Q3. What is meant by the term buoyancy?
• Q4. A metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into water contained in a jar. What changes do you expect in the readings of spring balance? Explain your answer.
• Q5. Describe an experiment to verify Archimedes’ principle.