MCQ
The process requiring absorption of energy is
- ✓$N \longrightarrow {N^ - }$
- B$F \longrightarrow {F^ - }$
- C$Cl \longrightarrow {Cl^ - }$
- D$H \longrightarrow {H^ - }$
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$CS_2 + 3O_2 \to 2SO_2 + CO_2$

(Rounded-off to the nearest integer) $\left[ h =6.63 \times 10^{-34}\, Js , c =3.00 \times 10^{8} \,ms ^{-1}\right.$ $,$ $\left. N _{ A }=6.02 \times 10^{23}\, mol ^{-1}\right]$
Assertion $A :$ The amphoteric nature of water is explained by using Lewis acid/base concept.
Reason $R$ : Water acts as an acid with $NH _{3}$ and as a base with $H _{2} S$.
In the light of the above statements choose the correct answer from the options given below :