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2nd Year Chemistry Chapter 12 Test2nd Year · Chemistry · Federal (FBISE)
Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)
- Reaction of acyl chloride with primary amines produces:
- The product formed when acetaldehyde reacts with HCN is:
- Warming benzene diazonium chloride with water gives:
- Which reducing agent is used for nitrile reduction?
- The product formed when CH₃Br reacts with KCN in ethanol is:
- Which catalyst is used in the formation of cyanohydrin?
- Phenylamine is a weaker base than ammonia because:
- Ethyl group in ethyl amine is:
- Azo compounds are widely used as:
- What happens when benzenediazonium chloride reacts with phenol in NaOH(aq)?
Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)
- Why is HCN not used directly in reactions?
- Give the equation for the reduction of ethanamide.
- Explain the role of ethyl group as an electron-donating group.
- Why do amino acids exist as zwitter ions in solid state?
- Mention one industrial use of azo dyes.
- Write the pKb values of ammonia, ethyl amine, and phenylamine.
- Name the yellow dye obtained from benzene diazonium chloride and phenylamine.
- What is the difference between an amine and an amide?
Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)
- Describe the reduction of nitriles to form amines. Support with chemical reactions.
- Write a detailed note on essential and non-essential amino acids and their biological importance.
- Describe the reaction of phenylamine with HNO₂ and dilute acid below 1°C to produce the diazonium salt. What is the significance of this reaction in organic chemistry?