Lead Monoxide

Q. An aqueous solution of a substance gives a white precipitate on treatment with dil $HCl$, which dissolved on heating. On passing $H_{2}S$ in hot acidic solution a black precipitate is formed. The substance is:

1. $H{g}_2^{2+}$ salt
2. $C{u}^{2+}$ salt
3. $A{g}^{+}$ salt
4. $P{b}^{2+}$ salt

Q. Potassium carbonate cannot be prepared by Solvay process. Why ?

Q.

$Pb{C}_2{O}_4\underrightarrow{\Delta }A+C{O}_2+CO$

Identify A.

1. $Pb{O}_2$

2. $PbO$

3. $P{b}_{2}O$

4. $\text{None of these}$

Q.

$Pb{O}_2$ is

1. Basic

2. Acidic

3. Neutral

4. Amphoteric

Q. Which of the following halides does not hydrolyse at room temperature ?

1. $PbC{l}_4$
2. $SiC{l}_4$
3. $CC{l}_4$
4. $SnC{l}_4$

Q. Acetylene can form a precipitate of __________ when it is passed through ammonical cuprous chloride.

1. copper sulphate
2. copper nitrate
3. polypropylene
4. copper acetylide