Which of the following is $NOT$ a characteristic of chemisorption?

An insulated container contains $4 \, moles$ of an ideal diatomic gas at temperature $T$. Heat $Q$ is supplied to this gas,due to which $2 \, moles$ of the gas are dissociated into atoms,but the temperature of the gas remains constant. Then:

$NaOH$ is prepared by which of the following methods?

One mole of calcium phosphide on reaction with excess water gives

$A$ ray of light is incident along a line which meets another line,$7x - y + 1 = 0$,at the point $(0, 1)$. The ray is then reflected from this point along the line $y + 2x = 1$. Find the equation of the line of incidence of the ray of light.

If an organism is in the same $Class$ but not in the same $Family$, then it may belong to the same: