1. A
   A-3, B-1, C-4, D-2
2. B
   A-3, B-4, C-1, D-2
3. C
   A-2, B-4, C-1, D-3
4. D
   A-2, B-1, C-4, D-3

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1. A
   Heat
2. B
   Compression
3. C
   Decomposition
4. D
   Solution

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1. A
   NaOH
2. B
   KCl
3. C
   $\text{FeCl}_3$
4. D
   NaCl

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1. A
   $\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$
2. B
   $\text{CaO} + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2$
3. C
   $2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$
4. D
   $\text{Na}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{NaCl}$

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1. A
   Ammonium nitrate
2. B
   Ammonium sulphide
3. C
   Ammonium phosphate
4. D
   Ammonium sulphate

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1. A
   $\text{CaSO}_4 \cdot 2\text{H}_2\text{O}$
2. B
   $\text{Ca}_2\text{SiO}_4$
3. C
   $2\text{CaSO}_4 \cdot \text{H}_2\text{O}$
4. D
   $\text{CaSO}_4$

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1. A
   A given compound always contains exactly same proportion of elements.
2. B
   When gases combine in a reaction, they do so in a simple ratio by volume, provided all gases are at room temperature.
3. C
   Matter can neither be created nor destroyed.
4. D
   Equal volumes of all gases at same temperature and pressure contain equal number of molecules.

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1. A
   $1$ Å
2. B
   $1$ $\mu$m
3. C
   $1$ mm
4. D
   $1$ cm

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1. A
   $8$ m/s$^2$
2. B
   $12$ m/s$^2$
3. C
   $2$ m/s$^2$
4. D
   $-1$ m/s$^2$

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1. A
   +2 dioptre
2. B
   +0·02 dioptre
3. C
   −0·5 dioptre
4. D
   +0·5 dioptre

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1. A
   $\theta = \sin^{-1}(1/9\cdot8)$
2. B
   $\theta = \sin^{-1}(1/20)$
3. C
   $\theta = \sin^{-1}(1/80)$
4. D
   $\theta = \sin^{-1}(1/100)$

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1. A
   $0\cdot8 \times 10^{-5}$ K$^{-1}$
2. B
   $2\cdot4 \times 10^{-5}$ K$^{-1}$
3. C
   $3\cdot2 \times 10^{-5}$ K$^{-1}$
4. D
   $4\cdot8 \times 10^{-5}$ K$^{-1}$

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1. A
   $v_1$ is 1·5 times $v_2$.
2. B
   $v_2$ is 1·5 times $v_1$.
3. C
   $v_1$ is equal to $v_2$.
4. D
   $v_1$ is 3 times $v_2$.

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1. A
   Chlorofluorocarbon
2. B
   Nitrous oxide
3. C
   Carbon dioxide
4. D
   Methane

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1. A
   A-1, B-4, C-2, D-3
2. B
   A-1, B-2, C-4, D-3
3. C
   A-3, B-2, C-4, D-1
4. D
   A-3, B-4, C-2, D-1

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1. A
   A-2, B-3, C-4, D-1
2. B
   A-1, B-4, C-3, D-2
3. C
   A-2, B-4, C-3, D-1
4. D
   A-1, B-3, C-4, D-2

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1. A
   Mizoram—Manipur—Tripura—Meghalaya
2. B
   Tripura—Manipur—Meghalaya—Mizoram
3. C
   Meghalaya—Manipur—Mizoram—Tripura
4. D
   Manipur—Meghalaya—Tripura—Mizoram

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1. A
   Pretoria
2. B
   Saskatchewan
3. C
   Perth
4. D
   Buenos Aires

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1. A
   Solution
2. B
   Carbonation
3. C
   Oxidation
4. D
   Exfoliation

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1. A
   Its focal length is zero.
2. B
   The size of the image of an object placed in front of the mirror is slightly less than that of the object.
3. C
   The image is virtual, erect and laterally inverted.
4. D
   Its focal length is 200 cm.

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1. A
   It will never form an inverted image.
2. B
   The image moves towards the focus when the object moves towards the mirror.
3. C
   Depending on the position of the object with respect to the mirror, the image can be inverted and real.
4. D
   The size of the image becomes larger than that of the object when the object is placed at a distance equal to half the focal length.

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1. A
   0·05 tesla
2. B
   0·2 tesla
3. C
   0·4 tesla
4. D
   0·8 tesla

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1. A
   Right to equality
2. B
   Right to freedom
3. C
   Right to citizenship
4. D
   Right against exploitation

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1. A
   Opium
2. B
   Coffee
3. C
   Betel leaf
4. D
   Chili

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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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