Consider the following.
Statement $\mathrm{IH}_2 \mathrm{O}_2$ acts as an oxidising as well as reducing agent in both acidic and basic mediim.
Statement $\mathrm{II} 10 \mathrm{~V} \mathrm{H}_2 \mathrm{O}_2$ sample means it contains $6 \% \left(\frac{w}{v}\right) \mathrm{H}_2 \mathrm{O}_2$.
The correct answer is
Identify the correct statements from the following.
I. All alkaline earth metals give hydrides on heating with hydrogen.
II. Calcium hydroxide is used to purify sugar.
III. $\mathrm{BeCl}_2$ is a dimer in gaseous phase.Select the correct statements from the following
(A) Aluminium liberates $\mathrm{H}_2$ gas with dil. HCl but not with aqueous NaOH .
(B) Formula of sodium metaborate is $\mathrm{Na}_3 \mathrm{BO}_3$.
(C) Boric acid is a weak monobasic acid.
(D) For thallium, +1 state is more stable than +3 state.
The number of amphoteric oxides from the following is $\mathrm{CO}_2, \mathrm{GeO}_2, \mathrm{SnO}_2, \mathrm{PbO}_2$, $\mathrm{CO}, \mathrm{GeO}, \mathrm{SnO}, \mathrm{PbO}$
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