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1. A
   $\text{I}_2 > \text{Br}_2 > \text{Cl}_2 > \text{F}_2$
2. B
   $\text{Br}_2 > \text{Cl}_2 > \text{F}_2 > \text{I}_2$
3. C
   $\text{F}_2 > \text{Cl}_2 > \text{Br}_2 > \text{I}_2$
4. D
   $\text{Cl}_2 > \text{F}_2 > \text{Br}_2 > \text{I}_2$

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1. A
   $3.6132 \times 10^{23}$
2. B
   $7.2264 \times 10^{23}$
3. C
   $4.8396 \times 10^{23}$
4. D
   $5.0331 \times 10^{23}$

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1. A
   Stephen reduction
2. B
   Clemmensen reduction
3. C
   Wolf Kishner reduction
4. D
   Rosenmund reduction

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1. A
   $\text{BeCl}_2$ and $\text{Be(OH)}_2$
2. B
   $\text{BeCl}_2$ and $\text{Na}_2\text{BeO}_4$
3. C
   $\text{Be(OH)}_2$ and $\text{BeCl}_2$
4. D
   $\text{BeCl}_2$ and $\text{Na}_2\text{BeO}_2$

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1. A
   $\text{SO}_3$
2. B
   NO
3. C
   $\text{Al}_2\text{O}_3$
4. D
   CaO

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1. A
   $3.24 \times 10^{-10}$
2. B
   $2.44 \times 10^{-10}$
3. C
   $1.64 \times 10^{-10}$
4. D
   $4.00 \times 10^{-10}$

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1. A
   $\text{RCONH}_2 \xrightarrow{\text{Br}_2/\text{KOH(aq)}} \text{R-NH}_2$
2. B
   $\text{R-NH}_2 \xrightarrow{\text{excess R-X}} \text{R}_4\text{NX}$
3. C
   $\text{R}_4\text{NX} \xrightarrow{\text{moist Ag}_2\text{O}, \Delta} \text{Alkene} + \text{R}_3\text{N}$
4. D
   $\text{RCN} \xrightarrow{\text{Na/C}_2\text{H}_5\text{OH}} \text{RCH}_2\text{NH}_2$

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1. A
   $0.5x$ mol dm$^{-3}$ s$^{-1}$
2. B
   $x$ mol dm$^{-3}$ s$^{-1}$
3. C
   $2x$ mol dm$^{-3}$ s$^{-1}$
4. D
   $\frac{3}{2}x$ mol dm$^{-3}$ s$^{-1}$

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1. A
   But-1-en-1-ol
2. B
   But-3-en-1-ol
3. C
   But-2-en-1-ol
4. D
   Butane-1,3-diol

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1. A
   Haemoglobin
2. B
   Gum
3. C
   Gelatin
4. D
   Cadmium sulfide

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1. A
   $1.1 \times 10^{21}$
2. B
   $2.2 \times 10^{21}$
3. C
   $3.3 \times 10^{21}$
4. D
   $4.4 \times 10^{21}$

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1. A
   1-Fluoro-2-methylpropane
2. B
   2-Fluoro-2-methylpropane
3. C
   1-Flurobutane
4. D
   2-Flurobutane

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1. A
   $\Delta H^\circ = T\Delta S^\circ$
2. B
   $\Delta H^\circ = \frac{\Delta S^\circ}{T}$
3. C
   $\Delta H^\circ = T\Delta S^\circ$
4. D
   $\Delta H^\circ = \frac{1}{T}\Delta S^\circ$

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1. A
   Monomolecular and $\frac{1}{2}$
2. B
   Monomolecular and 1
3. C
   Monomolecular and $\frac{3}{2}$
4. D
   Bimolecular and $\frac{3}{2}$

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1. A
   No
2. B
   Mo
3. C
   Co
4. D
   Ce

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1. A
   -5
2. B
   5
3. C
   6
4. D
   7

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1. A
   14
2. B
   10
3. C
   04
4. D
   06

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1. A
   Water (molecular level)
2. B
   Glucose (molecular level)
3. C
   Virus
4. D
   Bacteria

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1. A
   Cytosine
2. B
   Guanine
3. C
   Uracil
4. D
   Thymine

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1. A
   $5.10 \times 10^{-2}$ kg
2. B
   $4.25 \times 10^{-2}$ kg
3. C
   $1.72 \times 10^{-2}$ kg
4. D
   $3.44 \times 10^{-2}$ kg

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

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1. A
   $\frac{1}{5}$
2. B
   $\frac{2}{5}$
3. C
   $\frac{3}{5}$
4. D
   $\frac{4}{5}$

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1. A
   38
2. B
   36
3. C
   33
4. D
   34

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1. A
   $\tan^{-1}\frac{22}{19}$
2. B
   $\tan^{-1}\frac{22}{13}$
3. C
   $\tan^{-1}\frac{21}{19}$
4. D
   $\tan^{-1}\frac{19}{22}$

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1. A
   $\left(\frac{48}{19}, \frac{23}{19}, -\frac{13}{19}\right)$
2. B
   $\left(-\frac{48}{19}, \frac{23}{19}, -\frac{13}{19}\right)$
3. C
   $\left(-\frac{48}{19}, -\frac{23}{19}, -\frac{13}{19}\right)$
4. D
   $\left(\frac{48}{19}, -\frac{23}{19}, -\frac{13}{19}\right)$

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