National Standard Examination in Chemistry (NSEC) Solved Paper 2016 Part-2
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Q: 5. The correct statement⟋s is⟋are:
I. Soap is excellent for cleaning, 100% broken down by bacteria in rivers and hence has no further environmental damaging repercussions
II. Soap forms an insoluble precipitate⟋scum when hard water containing calcium and magnesium ion is used.
III. Soaps can be used for cleansing under acidic solutions
(A) Only I
(B) Only II
(C) Only III
(D) I and III
Answer: (B)
Q: 6 The kinetic rate expression and the unit of rate constant (k) of the above reaction are respectively
(A)
(B)
(C)
(D)
Answer: (C)
Q: 7. Which of the following statements is not true for and ?
(A) Both absorb in UV region
(B) Both show f-f transition
(C) Both show 4f to 5d transition
(D) Both ions are colorless
Answer (B)
Sol: Both and are colored ions but donot show f-f transition
Q: 8.Complete catalytic hydrogenation of naphthalene gives decalin The number of isomers of decalin formed and the total number of isomers of decalin possible are respectively
Answer: (A)
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