National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-3

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Q: 9. The mass of argon adsorbed per unit mass of carbon surface is plotted against pressure. Which of the following plots is correct if X and m represent the masses of argon and carbon respectively? (……….represents extrapolated data)

(A)

Q 9 A Graph of Argon and Carbon

Q 9 a Graph of Argon and Carbon

Q 9 A Graph of Argon and Carbon

(B)

Q 9 B Graph of Argon and Carbon

Q 9 B Graph of Argon and Carbon

Q 9 B Graph of Argon and Carbon

(C)

Q 9 C Graph of Argon and Carbon

Q 9 C Graph of Argon and Carbon

Q 9 C Graph of Argon and Carbon

(D)

Q 9 D Graph of Argon and Carbon

Q 9 D Graph of Argon and Carbon

Q 9 D Graph of Argon and Carbon

Answer: (D)

Q: 10. In a process, n-propyl chloride is reacted with sodium butanoate in an aqueous medium. After the reaction, diethyl ether is added and the solution is shaken. The two layers are separated. The Incorrect statement with respect to this procedure is

(A) The reaction gives a solid product, which precipitates in the aqueous solution

(B) The reaction takes place in the aqueous medium

(C) The product is extracted in diethyl ether and the organic layer is the upper layer

(D) The salt formed in the reaction remains in aqueous medium

Answer: (A)

Q: 11. Which of the following statements about ammonium cerium (IV) nitrate, is false?

(A) acts as a monodontate ligand

(B) The Ce atom has a coordination number of 12

(C) The shape of the complex ion is icosahedron

(D) The solution is used as oxidizing agent

Answer: (A)

Q: 12. The correct order of the magnitude of bond energy of the central C-C bond in the following compounds is:

(i)

(J)

(k)

(l)

(A)

(B)

(C)

(D)

Answer: (D)

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