1. A
   Any energy transfer that does not involve temperature difference in some way is not heat
2. B
   Any energy transfer always requires a temperature difference
3. C
   On heating the length and volume of the object remain exactly the same
4. D
   Whenever there is a temperature difference, heat is the only way of energy transfer

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1. A
   The motion repeats after time $T$ only once
2. B
   $T$ is the least time after which motion repeats itself
3. C
   The motion repeats itself after $nT$, where $n$ is a positive integer
4. D
   $T$ remains the same only for small angular displacements

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1. A
   Its motion is along a straight line
2. B
   Its speed changes with time
3. C
   Its acceleration is zero
4. D
   Its displacement increases linearly with time

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1. A
   passing through origin
2. B
   with x-intercept $u$
3. C
   with y-intercept $u$
4. D
   with slope $u$

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1. A
   Zero
2. B
   Depends upon length of the magnet
3. C
   Never zero
4. D
   Depends upon temperature

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1. A
   An atom
2. B
   A molecule
3. C
   A one-rupee coin
4. D
   A cricket ball

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1. A
   $1 \cdot 8 \times 10^{6}\,\text{J}$
2. B
   $3 \cdot 6 \times 10^{6}\,\text{J}$
3. C
   $6 \cdot 0 \times 10^{6}\,\text{J}$
4. D
   $7 \cdot 2 \times 10^{6}\,\text{J}$

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1. A
   It is experienced by all bodies in the universe
2. B
   It is a dominant force between celestial bodies
3. C
   It is a negligible force for atoms
4. D
   It is same for all pairs of bodies in our universe

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1. A
   mass of the object only
2. B
   mass of the object and density of liquid only
3. C
   difference in the densities of the object and liquid
4. D
   mass and shape of the object only

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1. A
   Conducting copper coil
2. B
   Electric heating coil
3. C
   Semi conductor diode
4. D
   Rheostat

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1. A
   Reflection of light
2. B
   Refraction of light
3. C
   Dispersion of light
4. D
   Total internal reflection of light

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1. A
   0 – 200 Hz
2. B
   20 – 20,000 Hz
3. C
   200 – 20,000 Hz only
4. D
   2,000 – 20,000 Hz only

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1. A
   Hydrochloric acid
2. B
   Methanoic acid
3. C
   Citric acid
4. D
   Sulphuric acid

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1. A
   It is acidic
2. B
   It is neutral
3. C
   It is basic
4. D
   It is made up of Calcium phosphate, the material of tooth enamel

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1. A
   Sodium hydroxide solution
2. B
   Milk of magnesia
3. C
   Lemon juice
4. D
   Gastric juice

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1. A
   NaCl
2. B
   NaOH
3. C
   $\text{NaHCO}_{3}$
4. D
   $\text{Na}_{2}\text{CO}_{3}$

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1. A
   $\text{NaHCO}_{3}$
2. B
   $\text{Na}_{2}\text{CO}_{3} \cdot 10\text{H}_{2}\text{O}$
3. C
   $\text{Na}_{2}\text{CO}_{3} \cdot 5\text{H}_{2}\text{O}$
4. D
   NaOH

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1. A
   It is used as a reducing agent in chemical industries
2. B
   It is used for bleaching wood pulp in paper factories
3. C
   It is used for disinfecting drinking water
4. D
   It is used for bleaching linen in textile industry

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1. A
   single stranded circular DNA
2. B
   double stranded DNA
3. C
   single stranded RNA
4. D
   double stranded RNA

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1. A
   Cell wall
2. B
   Mitochondria
3. C
   Plasma membrane
4. D
   Ribosome

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1. A
   Bronchi
2. B
   Bowman's capsule
3. C
   Diaphragm
4. D
   Trachea

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1. A
   Thallophytes have well differentiated body design
2. B
   Funaria is a fungus
3. C
   All Pteridophytes are Phanerogams
4. D
   Vascular system is not found among Bryophytes

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1. A
   Phylum – Class – Order – Family – Genus
2. B
   Phylum – Class – Family – Order – Genus
3. C
   Family – Order – Class – Species – Genus
4. D
   Class – Family – Order – Species – Genus

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1. A
   These are dead tissues and form wood
2. B
   They provide flexibility to plant due to their thickened walls
3. C
   These are present in the bark of a tree only
4. D
   Growth occurs in plants due to division of cells of these tissues

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1. A
   Chandigarh
2. B
   Lakshadweep
3. C
   Andaman and Nicobar Islands
4. D
   Puducherry

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