General Properties

Q. Bond angle of Group-16 hydrides decreases down the group and the bond angle of $H_{2}Te$ is approximately ${90}^0.$

1. False
2. True

Q.

Which of the following can be beaten into thin sheets?

1. Zinc

2. Phosphorus

3. Sulfur

4. Oxygen

Q.

Amongst all the elements discovered, how many are:

Metals

Q. Which is the correct thermal stability order for $H_{2}E(E=O,S,Se,TeandPo)?$

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1. $H_{2}Po<H_{2}Te<H_{2}Se<H_{2}S<H_{2}O$
2. $H_{2}O<H_{2}S<H_{2}Se<H_{2}Te<H_{2}Po$
3. $H_{2}Se<H_{2}Te<H_{2}Po<H_{2}O<H_{2}S$
4. $H_{2}S<H_{2}O<H_{2}Se<H_{2}Te<H_{2}Po$

Q. Which is the correct thermal stability order
for $H_{2}E$ $(E=O,S,Se,TeandPo$)?

1. $H_{2}S$<$H_{2}O$<$H_{2}Se$<$H_{2}Te$<$H_{2}Po$
2. $H_{2}O$<$H_{2}S$<$H_{2}Se$<$H_{2}Te$<$H_{2}Po$
3. $H_{2}Po$<$H_{2}Te$<$H_{2}Se$<$H_{2}S$<$H_{2}O$
4. $H_{2}Se$<$H_{2}Te$<$H_{2}Po$<$H_{2}O$<$H_{2}S$

Q. $K_{2}C{r}_2{O}_7+S{O}_2\stackrel{H^{+}}{\to }$ Products.
In this reaction, the final oxidation states of sulphur and chromium are:

1. +3, +6
2. +6, +3
3. +4, +3
4. +6, +6