MCQ
The oxide without nitrogen-nitrogen bond is :
- A$\mathrm{N}_{2} \mathrm{O}$
- B$\mathrm{N}_{2} \mathrm{O}_{4}$
- C$\mathrm{N}_{2} \mathrm{O}_{3}$
- ✓$\mathrm{N}_{2} \mathrm{O}_{5}$

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(Rounded-off to the nearest integer) $\left[ h =6.63 \times 10^{-34}\, Js , c =3.00 \times 10^{8} \,ms ^{-1}\right.$ $,$ $\left. N _{ A }=6.02 \times 10^{23}\, mol ^{-1}\right]$
$C_2H_4(g) + H_2(g) \to C_2H_6(g)$
.......$kJ$
| Bond | Bond energy $(kJ)$ |
| $C-H$ |
$413$ |
| $C-C$ | $348$ |
| $C=C$ | $610$ |
| $H-H$ | $436$ |
$(A)$ Enzymes are biocatalysts.
$(B)$ Enzymes are non-specific and can catalyse different kinds of reactions.
$(C)$ Most Enzymes are globular proteins.
$(D)$ Enzyme - oxidase catalyses the hydrolysis of maltose into glucose.
Choose the correct answer from the option given below: