Which of the following carbides will give propyne on hydrolysis?

Name the plant whose leaves are economically important and earn foreign exchange.

The centre of mass of a body

Which of the following is non-ionizable?

Which of the following cations cannot give the borax bead test?

Two cylinders $A$ and $B$ fitted with pistons contain equal amounts of an ideal diatomic gas at $300 \ K$. The piston of $A$ is free to move while that of $B$ is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in $A$ is $30 \ K$,then the rise in temperature of the gas in $B$ is ..... $K$.