National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-13

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Q: 57.1. 250g metal carbonate was treated with 5oo mL of 0.1 M HCl solution. The unreacted HCl required 50.0ml of 0.500 M solution for neutralization. Identify the metal M

(A)

(B)

(C)

(D)

Answer: (B)

Q: 58. An electron beam can undergo diffraction by crystals which proves the wave nature of electrons. The potential required for a beam of electrons to be accelerated so that its wavelength becomes equal to 0.154 nm is

(A)

(B)

(C) 635 V

(D) 127 V

Answer: (A)

Q: 59. A biodegradable alternating copolymer of L-alanine and glycolic acid is

(A)

Q_59_A_Structure of L-Alanine and Glycolic Acid

(B)

Q_59_B_Structure of L-Alanine and Glycolic Acid

(C)

Q_59_C_Structure of L-Alanine and Glycolic Acid

(D)

Q_59_D_Structure of L-Alanine and Glycolic Acid

Answer: (A)

Q: 60. In which of the following complexes the metal ion has the lowest ionic radius?

(A)

(B)

(C)

(D)

Answer: (B)

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