Chemistry MCQ GK Questions

               

The nucleus of an atom consists of

 

electrons and neutrons.

electrons and protons.

protons and neutrons.

All of the above.

 

 

 


  1. The number of moles of solute present in 1 kg of a solvent is called its

 

molality

molarity

normality

formality

 

 

 


  1. The metallurgical process in which a metal is obtained in a fused state is called

 

smelting

roasting

calcinations

froth floatation

 

 

 


  1. The molecules of which gas have highest speed?

 

H2 at -73oC

CH4 at 300 K

N2 at 1,027oC

O2 at 0oC

 

 

 


  1. The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock’s called

 

granite

basalt

igneous rocks

sedimentary rocks