Hydrogen & Its Compounds - Chemistry PYQ AP EAPCET

What are \(X\) and \(Y\) respectively in the following reactions?

$$\begin{aligned} & \underline{X}+D_2 \mathrm{O} \longrightarrow C_2 D_2+P \\ & \underline{Y}+D_2 \mathrm{O} \longrightarrow C D_4+Q \end{aligned}$$

Calcium carbide \(+\mathrm{D}_2 \mathrm{O} \longrightarrow \underline{X}+\mathrm{Ca}(\mathrm{OD})_2\). The hybridisation of carbon atom(s) in \(X\)

Two statements are given below :

I. In dry cleaning, the solvent $\mathrm{Cl}_2 \mathrm{C}=\mathrm{CCl}_2$ was earlier used and now it is replaced by liquefied $\mathrm{CO}_2$

II. In bleaching of paper, $\mathrm{H}_2 \mathrm{O}_2$ was used earlier and now it is replaced by chlorine gas. Correct anwer is

The correct statements among the following are

(i) saline hydrides produce $\mathrm{H}_2$ gas when reacted with water

(ii) presently $\sim 77 \%$ of the industrial dihydrogen is produced from coal

(iii) commercially marketed $\mathrm{H}_2 \mathrm{O}_2$ contains $3 \% \mathrm{H}_2 \mathrm{O}_2$

In which of the following reactions, hydrogen is oned the products?

I. $\mathrm{NaBH}_4+\mathrm{I}_2 \longrightarrow$

II. $\mathrm{BF}_3+\mathrm{NaH} \xrightarrow{450 \mathrm{~K}}$

III. $\mathrm{BF}_3+\mathrm{LiAlH}_4 \longrightarrow$

IV. $\mathrm{B}_2 \mathrm{H}_6+\mathrm{NH}_3 \xrightarrow{\text { heat }}$

Compound ' $X$ ' is prepared commercially by the electrolysis of brine solution.

Which of the following is not the use of ' $X$ '?

4 mL of ' $X$ volume' $\mathrm{H}_2 \mathrm{O}_2$ on heating gives 80 mL of oxygen at STP. The value of $X$ is

The incorrect statement in the following is

Which of the following property is less for $\mathrm{D}_2 \mathrm{O}$ than $\mathrm{H}_2 \mathrm{O}$ ?

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 hydride which is not correctly matched with the example given in brackets ?

Which of the following reactions give $\mathrm{H}_2$ as one of the products?

(Reactions are not balanced)

I. $\mathrm{NaBH}_4+\mathrm{I}_2 \longrightarrow$

II. $\mathrm{B}_2 \mathrm{H}_6+\mathrm{N}\left(\mathrm{CH}_3\right)_3 \rightarrow$

III. $\mathrm{Al}+\mathrm{NaOH}+\mathrm{H}_2 \mathrm{O} \longrightarrow$

IV. $\mathrm{BF}_3+\mathrm{NaH} \longrightarrow$