181. Which of the following is an exothermic reaction?
A. Combustion of methane
B. Decomposition of water
C. Conversion of H2 to 2 [H]
D. Dehydrogenation of alkane
182. A system which neither exchanges matter nor energy with surrounding is:
A. Open system
B. Closed system
C. Isolated system
D. Inert System
183. Plants and animals are examples of:
A. Open system
B. Closed system
C. Isolated system
D. Adiabatic system
184. If the value of ΔH of reaction is positive then the reaction is called:
A. Exothermic
B. Endothermic
C. Spontaneous
D. Non-Spontaneous
185. What is the color of iodoform?
A. White
B. Yellow
C. Black
D. Blue
186. The industrial smog contains smoke mixed with:
A. CO2
B. O3
C. SO2
D. SO3
187. Nail polish remover is composed of:
A. Ethyl alcohol and ethyl acetate
B. Acetic acid and Acetone
C. Acetone and ethyl alcohol
D. Acetone and ethyl acetate
188. Ethers can be prepared by the reaction of alkyl halides with:
A. PbO
B. Cu2O
C. Na2O
D. Ag2O
189. The alcohol with greater reactivity with respect to the cleavage of its O-H bond is?
A. Ter-alcohol
B. CH3OH
C. Pri-alcohol
D. Sec-alcohol
190. The temperature at which two or more than two types of crystals exist in equilibrium is called:
A. Melting Point
B. Transition temperature
C. Boiling point
D. Eutectic temperature
Admin