Chemistry Questions and Answers for Competitive Exam

Chemistry Questions with Answers

Q.29 The main chemical constituent of the oil of cardamom which is responsible for flavor of this oil is

(A) cineole

(B) engenol

(C) geraniol

(D) limonene

Q.30 The molecule which has the highest percentage of ionic character among the following is

(A) HI

(B) HF

(C) HCI

(D) HBr

Q.31 The gas used in the manufacture of vanaspati from vegetable oil is

(A) hydrogen

(B) oxygen

(C) nitrogen

(D) carbon dioxide

Q.32 The ionic radii of N3-, O2-, F- and Na+ follows the order

(A) N3- > O2- > F- > Na+

(B) N3- > Na+ > O2- > F-

(C) Na+ > O2- > N3- > F-

(D) O2- > F- > Na+ > N3-

Q.33 The graphite rods in the nuclear reactor

(A) react with U to release energy

(B) produce neutrons

(C) undergo combustion which triggers the nuclear fission

(D) convert fast moving neutrons into thermal neutrons

Q.34 The first metal used by man was

(A) iron

(B) copper

(C) gold

(D) bronze

Q.35 The hydronium ion is

(A) H+

(B) HO -

(C) H2+

(D) H3O+

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