Which one of the following salts gives an acidic solution in water?

Viruses are distinct from other living cells because -

If the terminal speed of a sphere of gold (density $= 19.5 \times 10^3 \, kg/m^3$) is $0.2 \, m/s$ in a viscous liquid (density $= 1.5 \times 10^3 \, kg/m^3$),find the terminal speed of a sphere of silver (density $= 10.5 \times 10^3 \, kg/m^3$) of the same size in the same liquid.

If the altitudes of a triangle are in arithmetic progression,then the sides of the triangle are in

Which one of the following is a secondary alcohol?

$A$ man is standing on a balance and his weight is measured. If he takes a step to the left side,then his weight: