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

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

The apparatus used for detecting lie is known as 

X - rays region lies between 

Atmospheric temperature increasing at the higher altitudes is called 

Which lubricant is used for heavy machines? 

Which one of the following is a condition of delayed blood clotting? 

The thickness of the Troposphere increases