National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-8

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Q: 33. The kinetic energy of an electron that has a wavelength of 10 nm is

(A)

(B)

(C)

(D)

Answer: (A)

Q: 34. Which of the following compounds contain 3-centered 2-electron bonding?

(i)

(ii)

(iii)

(iv)

(A)

(B)

(C)

(D)

Answer: (C)

Q: 35. 3-Methylpentane on monochlorination gives four possible products. The reaction follows free radical mechanism. The relative reactivities for replacement of –H are

Q 35 Image of Methylpentane Reaction

Q 35 Image of Methylpentane Reaction

Q 35 Image of Methylpentane Reaction

Relative amounts of A, B, C and D formed are

(A)

(B)

(C)

(D)

Answer: (C)

Q: 36. White phosphorous on reaction with NaOH gives and

(A)

(B)

(C)

(D)

Answer: (B)

Q: 37. Given the values for the half reactions

Which of the following statements is true?

(A) is a stronger oxidizing agent than

(B) is a stronger reducing agent than

(C) is a stronger oxidizing agent than

(D) is a stronger reducing agent than

Answer: (B)

Q: 38. For the conversion at 1 bar 350 K, the correct set of thermodynamic parameters is (Boiling point of is 77° C)

(A)

(B)

(C)

(D)

Answer: (A)

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