1. A
   Compound A is $\text{C}_2\text{H}_5\text{OH}$ and B is $\text{CH}_3\text{CHO}$
2. B
   Compound A is $\text{CH}_3\text{OCH}_3$ and B is $\text{CH}_3\text{COOCH}_3$
3. C
   Compound A is $\text{C}_2\text{H}_5\text{OH}$ and B is $\text{CH}_3\text{COOH}$
4. D
   Compound A is $\text{CH}_3\text{COOH}$ and B is $\text{C}_2\text{H}_5\text{COOH}$

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1. A
   Reducing agent, Esterification
2. B
   Oxidizing agent, Saponification
3. C
   Acid, Esterification
4. D
   Dehydrating agent, Esterification

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1. A
   $\text{C}_3\text{H}_6$, $\text{C}_2\text{H}_2$
2. B
   $\text{C}_3\text{H}_8$, $\text{CH}_4$
3. C
   $\text{C}_3\text{H}_8$, $\text{C}_2\text{H}_5\text{OH}$
4. D
   $\text{C}_3\text{H}_8$, $\text{C}_3\text{H}_6$

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1. A
   Methylpentene
2. B
   Hex-1-yne
3. C
   Hex-2-ene
4. D
   Methylpentyne

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1. A
   helium
2. B
   neon
3. C
   argon
4. D
   krypton

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1. A
   All of these
2. B
   B and D
3. C
   A and C
4. D
   B and C

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1. A
   $\text{CH}_3\text{CH}_2\text{-COOCH}_3$ : Ethanoic acid
2. B
   $\text{CH}_3\text{CH}_2\text{-CO-CH}_3$ : Butanone
3. C
   $\text{CH}_3\text{CH}_2\text{-CHO}$ : Propanal
4. D
   $\text{CH}_3\text{-CH}_2\text{-CH}_2\text{-CH}_2\text{-OH}$ : Butanol

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1. A
   Alcohol makes the breath dry and the machine registers moisture.
2. B
   Alcohol makes the breath hotter which changes the machine reading.
3. C
   Alcohol causes more saliva which the machine checks.
4. D
   Alcohol in the breath causes a chemical change which is registered by the breath analyzer machine.

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1. A
   tin
2. B
   phosphorus
3. C
   sulphur
4. D
   carbon

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1. A
   (i) and (ii)
2. B
   (ii) and (iii)
3. C
   (i) and (iv)
4. D
   (iii) and (iv)

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1. A
   presence of water
2. B
   absence of sunlight
3. C
   presence of hydrochloric acid
4. D
   presence of sunlight

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1. A
   (iii) and (iv)
2. B
   (i) and (iv)
3. C
   (ii) and (iii)
4. D
   (i) and (ii)

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1. A
   $\text{C}_4\text{H}_9\text{OH} \xrightarrow{\text{Alkaline } \text{KMnO}_4} \text{C}_3\text{H}_7\text{COOH}$
2. B
   $\text{CH}_3\text{COONa} + \text{NaOH} \to \text{CH}_4 + \text{Na}_2\text{CO}_3$
3. C
   $\text{CH}_3\text{COOC}_2\text{H}_5 + \text{NaOH} \to \text{CH}_3\text{COONa} + \text{C}_2\text{H}_5\text{OH}$
4. D
   $2\text{C}_2\text{H}_5\text{OH} + 2\text{Na} \to 2\text{C}_2\text{H}_5\text{COONa} + \text{H}_2$

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1. A
   Formic acid, Ethanol
2. B
   Ethanoic acid, Ethanol
3. C
   Propanoic acid, Methanol
4. D
   Formic acid, Propanol

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

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1. A
   2-methyl butane
2. B
   3-methyl butane
3. C
   2 methyl butene
4. D
   3 methyl butane

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1. A
   Carboxylic acid
2. B
   Alcohol
3. C
   Ketone
4. D
   Aldehyde

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1. A
   Fourteen
2. B
   Twelve
3. C
   Sixteen
4. D
   One

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1. A
   $\text{-COOH}$
2. B
   $\text{-CHO}$
3. C
   $\text{-CO-}$
4. D
   $\text{-OH}$

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1. A
   One
2. B
   Two
3. C
   Three
4. D
   Four

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1. A
   Butyne $\text{C}_4\text{H}_8$
2. B
   Butyne $\text{C}_4\text{H}_6$
3. C
   Propyne $\text{C}_3\text{H}_6$
4. D
   Propyne $\text{C}_3\text{H}_4$

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1. A
   9 and 3
2. B
   6 and 6
3. C
   3 and 3
4. D
   3 and 9

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1. A
   (ii) and (iv)
2. B
   (iii) and (iv)
3. C
   (i) and (iii)
4. D
   (ii) and (iii)

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1. A
   Hydrogenation reaction
2. B
   Substitution reaction
3. C
   Combustion reaction
4. D
   Addition reaction

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1. A
   All of these
2. B
   Ethyne
3. C
   Ethane
4. D
   Ethene

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