1. A
   The ring has higher kinetic energy
2. B
   The disc has higher kinetic energy
3. C
   The ring and the disc have the same kinetic energy
4. D
   Kinetic energies of both the bodies are zero since they are not in linear motion

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   Thermal conduction
2. B
   Thermal convection
3. C
   Thermal radiation
4. D
   Both, thermal conduction and radiation

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1. A
   Ohm's law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.
2. B
   A conducting device obeys Ohm's law when the resistance of a device is independent of magnitude and polarity of applied potential difference.
3. C
   A conducting material obeys Ohm's law when the resistance of material is independent of the magnitude and direction of applied electric field.
4. D
   All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong.

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1. A
   Its speed
2. B
   Its momentum
3. C
   Its kinetic energy
4. D
   Its potential energy

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1. A
   $\text{Pb}_3\text{O}_4$
2. B
   $\text{Fe}_3\text{O}_4$
3. C
   $\text{Fe}_2\text{O}_3$
4. D
   $\text{Mn}_3\text{O}_4$

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1. A
   Glass is often said to be a supercooled liquid.
2. B
   Glass has no definite melting point.
3. C
   Soda glass is harder than pyrex glass.
4. D
   Boron is present in pyrex glass.

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1. A
   Both boiling and evaporation are surface phenomena.
2. B
   Boiling is a surface phenomenon, but evaporation is a bulk phenomenon.
3. C
   Both boiling and evaporation are bulk phenomena.
4. D
   Boiling is a bulk phenomenon, but evaporation is a surface phenomenon.

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1. A
   Diamond has a tetrahedral structure, whereas graphite has a hexagonal planar structure.
2. B
   Both physical and chemical properties of diamond and graphite are different.
3. C
   Graphite is soft but diamond is hard.
4. D
   Graphite is a good conductor of electricity while diamond is not.

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1. A
   Lime, silica and sulphur dioxide
2. B
   Lime, silica and carbon dioxide
3. C
   Lime, silica and alumina
4. D
   Lime, silica and boric acid

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1. A
   Hydrogen bonds are present in liquid water.
2. B
   Water has a high boiling point.
3. C
   Water has a high heat of fusion.
4. D
   Water is a non-polar molecule.

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1. A
   Caesium
2. B
   Potassium
3. C
   Calcium
4. D
   Magnesium

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1. A
   depends on its initial velocity.
2. B
   is independent of its initial velocity.
3. C
   increases linearly with time.
4. D
   depends on its initial displacement.

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1. A
   The disc
2. B
   The sphere
3. C
   Both have the same moment of inertia
4. D
   The information provided is not sufficient to answer the question

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1. A
   6, 2
2. B
   3, 5
3. C
   12, 4
4. D
   9, 3

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1. A
   is 0.
2. B
   is 50 km/hr.
3. C
   is 25 km/hr.
4. D
   cannot be calculated without knowing acceleration.

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1. A
   Ohm's law.
2. B
   Conservation of charge.
3. C
   Conservation of momentum.
4. D
   Conservation of energy.

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1. A
   0·50 mm
2. B
   29·07 cm
3. C
   0·925 m
4. D
   910 mm

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1. A
   Change in internal energy of the system is equal to flow of heat in or out of the system.
2. B
   Change in internal energy of the system is less than heat transferred.
3. C
   Change in internal energy of the system is more than the heat flow.
4. D
   Cannot be determined.

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1. A
   $\frac{15}{8}$ ohm
2. B
   $\frac{15}{7}$ ohm
3. C
   15 ohm
4. D
   $\frac{17}{3}$ ohm

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1. A
   A convex lens produces both real and virtual images.
2. B
   A concave lens produces both real and virtual images.
3. C
   A convex lens can produce images equal, greater and smaller than the size of the object.
4. D
   A concave lens always produces images smaller than the size of the object.

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1. A
   400 cal
2. B
   550 cal
3. C
   1050 cal
4. D
   1200 cal

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1. A
   Lime water
2. B
   Limestone
3. C
   Chalk
4. D
   Marble

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1. A
   Viscosity
2. B
   Floatation
3. C
   Elasticity
4. D
   Surface tension

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1. A
   Tin
2. B
   Sea water
3. C
   Soil
4. D
   Air

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