The solution of one of the following compounds will conduct electricity. This compound is:

Why does a Blackboard appear black in colour? 

Species which has restricted distribution is called

The instrument which uses sound waves to measure the depth of oceans is

Earth’s escape velocity is – 

Ethanol containing 5% water is known as-

Which one of the following elements exhibits the greatest tendency to lose electrons? 

Which of the following metals is used in accumulator batteries?