MCQ
Cutting of trees decreases :
- APollution level.
- BTemperature.
- ✓Fertility of soil.
- DCarbon dioxide level.
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[Given : $R :0.08314 \,L$ $bar$ $\,K ^{-1} \,mol ^{-1}]$
Reason : $NaOH$ is strong alkali.
| List$-I$ | List$-II$ |
| $A$ $16\,g \text { of } CH _{4( g )}$ | $I$ Weighs $28\,g$ |
| $B$ $1\,g \text { of } H _{2( g )}$ | $II$ $60.2 \times 10^{23}$ electrons |
| $C$ $1\,mole \text { of } N _{2( g )}$ | $III$ Weighs $32\,g$ |
| $D$ $0.5\,mol$ of $SO _{2( g )}$ | $IV$ Occupies $11.4\,L$ volume at STP |
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