National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-17

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Q: 76. A colorless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns white on cooling. An aqueous solution of the original solid gives a white precipitate with The original solid is

(A)

(B)

(C)

(D)

Answer: (A)

Q: 77. The following compounds are heated

(i)

(ii)

(iii)

(iv)

Which of the following statement/s is/are correct?

(A)

(B)

(C)

(D) All statements are correct

Answer: (D)

Q: 78. The diastereoisomer (Stereoisomer that is not a mirror image) of ‘X’ is

Q 78 Structure of Diastereoisomer

Q 78 Structure of Diastereoisomer

Q 78 Structure of Diastereoisomer

(A)

Q 78 A Structure of Diastereoisomer

Q 78 a Structure of Diastereoisomer

Q 78 A Structure of Diastereoisomer

(B)

Q 78 B Structure of Diastereoisomer

Q 78 B Structure of Diastereoisomer

Q 78 B Structure of Diastereoisomer

(C)

Q 78 C Structure of Diastereoisomer

Q 78 C Structure of Diastereoisomer

Q 78 C Structure of Diastereoisomer

(D)

Q 78 D Structure of Diastereoisomer

Q 78 D Structure of Diastereoisomer

Q 78 D Structure of Diastereoisomer

Answer: (C)

Q: 79. Given and 25°C, the value of for the reaction is

(A)

(B) 10

(C) 0.53

(D) 113

Answer: (B)

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