Question

Choose the correct option.

Type 1	Type 2
I) First order reaction	a) $\propto \frac{1}{a^{n-1}}$
II) Zero order reaction	b) Radioactive decay
III) Trimolecular reaction	c) Photochemical reactions
IV) Half life of nth order reaction	d) $2CO+O_2\to 2C{O}_2$

• A. I - a, II - b, III - c, IV - d
• B. I - b, II - c, III - d, IV - a
• C. I - c, II - d, III - b, IV - a
• D. I - d, II - c, III - b, IV - a

Answer 1

The correct option is B I - b, II - c, III - d, IV - a

All radioactive decay is the first-order reaction.

Photochemical reactions are zero order reaction.

Half-life of nth order reaction is:
$t_{\frac{1}{2}}$ for $n^{th}$ order $\propto \frac{1}{a^{n-1}}$

Trimolecular reaction $⟹2CO+O_2\to 2C{O}_2$
$rate=k\left[CO{]}^2\right[O_2]$
$order=2+1=3$