Naphthalene is used for making_________________?

Related Mcqs:

Pick out the wrong statement ?

A. Angle of repose of coal increases with its increasing size B. Specific gravity of coal increases with its increasing maturity C. Refractive index and reflectance of coal increases with the increasing rank of coal D. Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal...

‘Fat coals’ are those coals which have very high____________________?

A. Caking capacity B. Volatile matter content C. Fusion point of its ash D. Inherent moisture content...

Artificial draught produced by a fan can be controlled by the___________________?

A. Speed of the fan B. Damper C. Variation in the pitch of the fan blades D. All A., B. and C....

Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?

A. 50 B. 70 C. 85 D. 100...

Gross heating value of coal is ______________ the net heating value?

A. Higher than B. Lower than C. Same as D. Either A. or B.; depends on the type of coal...