chemistry MCQs – Page 57

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
1121. Which one of the following species is not an electrophile ?
comments icon0

A. Br+

B. H+

C. NH3

D. BF3

1122. Which of the following is not use of compounds of Fluorine________________?
comments icon0
A. None of the above

B. SbF3 is used for manufacture of pottery

C. Cu F2 is used in ceramic industry

D. Sodium fluoroacetate is a rat poison

1123. The stationary and mobile phases in paper chromatography are____________?
comments icon0

A. Liquid/solid

B. Solid/liquid

C. Liquid/liquid

D. Liquid/gas

1124. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?
comments icon0
A. 12 moles of KMnO4

B. 4.6 gram of C<sub>2</sub>H<sub>5</sub>OH

C. 0.6N H<sub>2</sub>SO<sub>4</sub>

D. 1.8 gram of H<sub>2</sub>O

1125. Which is the paramagnetic oxide of chlorine ?
comments icon0

A. Cl2O7

B. all

C. Cl2O6

D. ClO2
1126. What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ?
comments icon0
A. Two

B. One

C. Three

D. Zero

1127. Elimination bimolecular reactions involve____________________________?
comments icon0

A. third order kinetics

B. first order kinetics

C. second order kinetics

D. zero order kinetics

1128. Which of the following phenomenon is considered responsible for Global Warming?
comments icon0
A. Greenhouse effect

B. Monsoon

C. Fire in coal mines

D. Dry farming

1129. Which is methyl cyanide_________________?
comments icon0

A. CH3NO2

B. CH2 = CH CN

C. CH3NH2

D. CH3CN
1130. The number of lone pairs in XeOF4 is_________?
comments icon0

A. O

B. 3

C. 1

D. 2

1131. Which of the following alloys contain(s) Cu and Zn?
comments icon0

A. Gun-metal

B. Brass

C. Type metal

D. Bronze

1132. Heating phenol with Zn will yield_________________?
comments icon0

A. Phenoxide

B. Benzoic acid

C. Cyclohexane

D. Benzene
1133. Ethyl chloride with nascent hydrogen produces_________________?
comments icon0

A. butane

B. ethane

C. methane

D. propane

1134. What is the density ofargon gas at a temperature of 30C and a pressure of 1.05 atm?
comments icon0

A. 1.67 g/L

B. 1.65 g/L

C. 1.68 g/L

D. None of the above

1135. Which of the following is the most reactive_________________?
comments icon0

A. ethyne

B. ethene

C. ethane

D. benzene

1136. Fluorine can react with_________________?
comments icon0

A. Kr

B. Xe

C. Rn

D. All of the above
1137. The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
comments icon0

A. P-Block

B. d-Block

C. f-Block

D. S-Block

1138. What is the molecular formula for Nitric acid ________ ?
comments icon0

A. HNO2

B. H2NO4

C. HN2O2

D. HNO3
1139. Carbon in wrought iron is present as_________?
comments icon0

A. Partly as iron carbide and partly as graphite

B. Iron carbide

C. Graphite

D. Silicon carbide

1140. Hydrogenolysis results in the formation of________________?
comments icon0

A. alkyne

B. aldehydes

C. alkane

D. alkene