Oxides of Sulphur

Q. $K_{2}C{r}_2{O}_7$ in acidic medium converts into

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1. $C{r}^{5+}$
2. $C{r}^{2+}$
3. $C{r}^{4+}$
4. $C{r}^{3+}$

Q. Which of the following oxyanions contain S-S (single bond)?

1. $S_2{O}_7^{2-}$
2. $S_2{O}_6^{2-}$
3. $S_2{O}_5^{2-}$
4. $S_2{O}_4^{2-}$

Q. $2N{H}_3\left(g\right)\rightleftharpoons N_2\left(g\right)+3H_2\left(g\right)$ If 'a' moles of $N{H}_3$ are given initially. Let x moles of $N{H}_3$ are decomposed at equilbrium and $Vlitre$ be the capacity of vessel in which reaction is being studied. Find out the value of $K_c$.

1. $\frac{27x^4}{16V^2(a-x{)}^2}$
2. $\frac{27x^2}{16V^2(a-x{)}^2}$
3. $\frac{27x^2}{16V^2(a-x)}$
4. $\frac{27x^4}{16V^4(a-x{)}^2}$

Q. 20. What is photochemical smog

Q. Consider the following equation.
$H_2{S}_2{O}_7+H_{2}O\to \left(A\right)$
When compound (A) is allowed to react with $P_2{O}_5$, compound (C) is formed. How many $p_{\pi }-d_{\pi }$ bonds are present in compound (C).

Q.

$Mg+B\to A$. A is

1. 

2. 

3. 

4. 

Q. Which of the following molecule(s) gives only acid(s) or acidic species on hydrolysis?

1. $PC{l}_3$
2. $S{F}_4$
3. $NC{l}_3$
4. $P_4{O}_6$

Q. Define particulate pollutant. Classify the following particulate pollutants as viable or non viable : Smoke, dust, mist, moulds. Define particulate pollutant. Classify the following particulate pollutants as viable or non viable : Smoke, dust, mist, moulds.

Q. Match Column -1 (molecule) with Column - II (shape):
$\begin{array}{cccc}& & & \\ & Column-I& & Column-II\\ \left(a\right)& P_4& \left(p\right)& Crown\\ \left(b\right)& S_8& \left(q\right)& Polymeric\left(dimeric\right)\\ \left(c\right)& AlC{l}_3& \left(r\right)& Tetrahedral\\ \left(d\right)& PC{l}_5& \left(s\right)& Trigonalbipyramidal\end{array}$

1. (a) r; (b) p; (c) q; (d) s
2. (a) s; (b) p; (c) q; (d) r
3. (a) r; (b) q; (c) p; (d) s
4. (a) r; (b) p; (c) s; (d) q