Reactivity Towards Halogens

Q.

Arrange the following hydrides of Group-16 elements in the increasing order of their thermal stability:

${\mathrm{H}}_2\mathrm{O},{\mathrm{H}}_2\mathrm{S},{\mathrm{H}}_2\mathrm{Se},{\mathrm{H}}_2\mathrm{Te}$

Q. Which of the following species is not stable?

1. $[Si{F}_6{]}^{2-}$
2. $[GeC{l}_6{]}^{2-}$
3. $\left[Sn\right(OH{)}_6{]}^{2-}$
4. $[SiC{l}_6{]}^{2-}$

Q. The bond energy (in ${\text{kcal mol}}^{–1}$) of a $C-C$ single bond is approximately

1. $1$
2. $1000$
3. $10$
4. $100$

Q.

Stability of ions of $Ge,Sn,andPb$ will be in the order:

1. $G{e}^{2+}<S{n}^{2+}<P{b}^{2+}$

2. $G{e}^{4+}>S{n}^{4+}>P{b}^{4+}$

3. $S{n}^{4+}>S{n}^{2+}$

4. $P{b}^{2+}>P{b}^{4+}$

Q. Statement I $Al(OH{)}_3$ is amphoteric in nature.

Statement II $Al-O$ and $O-H$ bonds can be broken with equal ease in $Al(OH{)}_3.$
[1 Mark]

1. Statement I is corect; Statement II is correct; Statement II is the corect explanation of Statement I.
2. Statement I is correct; Statement II is correct;Statement II is not the correct explanation of Statement I.
3. Statement I is correct; Statement II is incorrect.
4. Statement I is incorrect; Statement II is true.

Q.

What is Chromium Salt?

Q.

Give examples of trivalent and tetravalent element.

Q. Which of the following statements is incorrect regarding the compounds of carbon family elements?

1. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6
2. The stability order of group 14 dihalides is $Si{X}_2>Ge{X}_2>Sn{X}_2>Pb{X}_2$
3. The order of boiling points of hydrides of group 14 elements is $C{H}_4<Si{H}_4<Ge{H}_4<Sn{H}_4$
4. $MeSiC{l}_3$ on hydrolysis and subsequent condensation will produce $\left(Me\right)Si{\left(OH\right)}_3$

Q. A group 13 element X reacts with chlorine gas to produce a compound $XC{l}_3$. $XC{l}_3$ is electron deficient and easily reacts with $N{H}_3$ to form $C{l}_{3}X\to N{H}_3\text{adduct}$; however, $XC{l}_3$ does not dimerize, X is:

1. $B$
2. $Al$
3. $Ga$
4. $In$

Q.

What volume of oxygen will be required to completely burn $160\text{mL}$ of acetylene, and what will be the volume of carbon dioxide so formed?

Q. The C-X bond energy order for the carbon tetra halides is:

1. $C{I}_4>CB{r}_4>CC{l}_4>C{F}_4$
2. $CC{l}_4>CB{r}_4>C{I}_4>C{F}_4$
3. $C{F}_4>CC{l}_4>CB{r}_4>C{I}_4$
4. None of above

Q. Which of the following can not react directly with halogens under suitable conditions?

1. C
2. Si
3. Ge
4. Pb

Q. The inert pair effect is most prominent in

1. C
2. Pb
3. Ge
4. Si

Q. Identify the reaction which proceeds at low pressure?

1. $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$
2. $N_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2NO\left(g\right)$
3. $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$
4. $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right)$

Q. Compare the stability of $+2$ oxidation state for the elements of the first transition series.

Q. Identify the lewis base among the following:

1. $B{F}_3$
2. $BeC{l}_2$
3. $N{H}_3$
4. $AlC{l}_3$

Q.

What kind of molecule is ${\mathrm{AlCl}}_3$?

Q. The decreasing order of the stability of the ions:

1. $I>II>III$
2. $III>II>I$
3. $II>III>I$
4. $II>I>III$

Q. 10. InFe4(Fe(CN)6)3 , The oxidation number of Fe present in coordination sphere is

Q. It is because of inability of $n{s}^2$electrons of the valence shell to participate in bonding that:-

1. $S{n}^{2+}$ is oxidising while $P{b}^{4+}$ is reducing
2. $S{n}^{2+}$ and $P{b}^{2+}$ are both oxidising and reducing
3. $S{n}^{4+}$ is reducing while $P{b}^{4+}$ is oxidising
4. $S{n}^{2+}$ is reducing while $P{b}^{4+}$ is oxidising

Q. Which of the following option correctly represent the correct set of stability order for the given ions?
(I) $G{a}^{3+}>I{n}^{3+}>T{l}^{3+}$
(II) $G{a}^{3+}<I{n}^{3+}<T{l}^{3+}$
(III) $G{e}^{+4}>S{n}^{+4}>P{b}^{+4}$
(IV) $G{e}^{+2}<S{n}^{2+}<P{b}^{2+}$
(V) $A{s}^{3+}<S{b}^{3+}<B{i}^{3+}$

1. II, III, IV, V
2. I, II, III, IV
3. II, IV, V
4. I, III, IV, V

Q.

Predict the shift in equilibrium when the volume is decreased on the equilibrium reaction: ${\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_5\left(\mathrm{g}\right)$

Q. Assertion :STATEMENT 1 (Assertion)- $SnC{l}_2$ is reducing in nature. Reason: STATEMENT 2 (Reason)- $S{n}^{2+}$ is more stable than $S{n}^{4+}$ state.

1. Statement 1 is True, statement 2 is True; statement 2 is a correct explanation for statement 1.
2. Statement 1 is True, statement 2 is True; statement 2 is not a correct explanation for statement 1.
3. Statement 1 is True, statement 2 is False.
4. Statement 1 is False, statement 2 is True.

Q. The stability of dihalides of $Si,Ge,Sn$ and $Pb$ increases steadily in the sequence ?

1. $Pb{X}_2<<Sn{X}_2<<Ge{X}_2<<Si{X}_2$
2. $Ge{X}_2<<Si{X}_2<<Sn{X}_2<<Pb{X}_2$
3. $Si{X}_2<<Ge{X}_2<<Pb{X}_2<<Sn{X}_2$
4. $Si{X}_2<<Ge{X}_2<<Sn{X}_2<<Pb{X}_2$

Q. Which is a Lewis base?

1. $B_2{H}_6$
   
2. $BC{l}_3$
   
3. $Al{H}_3$
4. $N{H}_3$

Q. which is more stable KFe[Cr(CN)6] or KCr[Fe(CN)6] ? What is the reason? Give me step by step explanation how to find the oxidation states in these complexes.

Q. Which of the following reason is correct regarding $[Si{F}_6{]}^{2-}$ is known where, as $[SiC{I}_6{]}^{2-}$ not?

1. Six large chloride ions can not be accommodated around ${Si}^{4+}$ due to limitation of its size
2. Interaction between lone pair of chloride ion and ${Si}^{4+}$is not very strong
3. Both A and B
4. Presence of d-orbitals in chlorine

Q. Mn(iii) undergoes disproportionate reaction easily. Explain.

Q. Choose the correct answer :
Match List -I with List - II.
$\begin{array}{cc}List-I& List-II\\ \text{(Ore)}& \text{(Element Present)}\\ \left(a\right)\text{Kernite}& \left(i\right)Tin\\ \left(b\right)\text{Cassiterite}& \left(ii\right)Boron\\ \left(c\right)\text{Calamine}& \left(iii\right)Fluorine\\ \left(d\right)\text{Cryolite}& \left(iv\right)Zinc\end{array}$

Choose the most appropriate answer from the options given below :

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1. $\left(a\right)\to \left(i\right),\left(b\right)\to \left(iii\right),\left(c\right)\to \left(iv\right),d\to \left(ii\right)$
2. $\left(a\right)\to \left(ii\right),\left(b\right)\to \left(iv\right),\left(c\right)\to \left(i\right),d\to \left(iii\right)$
3. $\left(a\right)\to \left(iii\right),\left(b\right)\to \left(i\right),\left(c\right)\to \left(ii\right),d\to \left(iv\right)$
4. $\left(a\right)\to \left(ii\right),\left(b\right)\to \left(i\right),\left(c\right)\to \left(iv\right),d\to \left(iii\right)$

Q. Assertion :Between $SiC{l}_4$ and $CC{l}_4$ only $SiC{l}_4$ reacts with water. Reason: $SiC{l}_4$ is ionic whereas $CC{l}_4$ is covalent.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect