MCQ
Which statement is false?
- AIn $3d$ series $Z_{eff}$ increased by $0.15$ continuously for last electron
- B$_{90}Th$ is an exception of block classification
- C$P \to P^-$ exothermic
- ✓$H_3PO_2 > H_3PO_3 > H_3PO_4$ acidic character
$(B)$ The oxides $NO _2 N _2 O , CO$ are neutral. Whereas the remaining oxides of $p$ block metals are acidic in nature.
Some of the $d$ block metal oxides are basic in nature, some of them acidic in nature where as the rest are amphoteric in nature.
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${N_2}(g)\, + \,3{H_2}(g)\,\rightleftharpoons \,2N{H_3}\,(g)$
at constant temperature and pressure. Then the ratio of the final volume to the initial volume of gases are.
$2Al{(s)}+6HCl{(aq)} \rightarrow 2Al^{^{3+}}{(aq)}+6Cl^-{(aq)} +3H_2{(g)}$
In which of the following pair above statement is $NOT$ $CORRECT$ ?
The pair $(s)$ of solutions which form a buffer upon mixing is(are)
$(A)$ $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COOH}$
$(B)$ $\mathrm{KOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
$(C)$ $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$
$(D)$ $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$