National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-11

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Q: 49. Compound ‘X’ in the following reaction is

Q_49_Structure of Ozonolysis Aq. KOH, Heat Compound X Reacti …

(A)

Q_49_A_Find the Compound X Reaction

(B)

Q_49_B_Find the Compound X Reaction

(C)

Q_49_C_Find the Compound X Reaction

(D)

Q_49_D_Find the Compound X Reaction

Answer: (C)

Q: 50. A toxic element is to be removed from drinking water by adsorption on activated charcoal. At low concentrations, the rate constant for adsorption is The time required to reduce the concentration of the toxic element to 10 % of its initial concentration is

(A)

(B)

(C)

(D) Cannot be calculated from the given data

Answer: (A)

Q: 51. Assuming that Hund՚s rule is violated by the diatomic molecule its bond order and magnetic nature will be respectively

(A) 1, Diamagnetic

(B) 1, Paramagnetic

(C) 2, Diamagnetic

(D) 2, Paramagnetic

Answer: (A)

Q: 52. In a cubic crystal structure, divalent metal-ion is located at the body-centered position, the smaller tetravalent metal ions are located at each corner and the ions are located half way along each of the edges of the cube. The number of nearest neighbors for oxygen is

(A) 4

(B) 6

(C) 2

(D) 8

Answer: (C)

Q: 53. Organic compounds sometimes adjust their electronic as well as steric structures to attain stability. Among the following, the compound having highest dipole moment is

(A)

Q_53_A_Structure of Steric

(B)

Q_53_B_Structure of Steric

(C)

Q_53_C_Structure of Steric

(D)

Q_53_D_Structure of Steric

Answer: (D)

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