Reactivity Towards Water

Q. Which of the following chlorides cannot get hydrolysed ?

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

Q. $\left[Ni\right(dmg{)}_2]$ complex is extra stable than expected due to formation of ring if the total number of five and six membered ring present in the complex is $x$ than the value of $x^2,$ is

Q. $Al(OH{)}_3$ is soluble in water.

1. True
2. False

Q. Which one is not true about carbides?

1. $A{l}_4{C}_3$ is methanide and produces methane on hydrolysis
2. $M{g}_2{C}_3$ is propylide and produces propane on hydrolysis
3. $Ca{C}_2$ and $N{a}_2{C}_2$ are acetylides and they produce acetylene on hydrolysis
4. $B{e}_{2}C$ gives methane on hydrolysis

Q. For the following reactions, the major products are:
$\text{Reaction 1:}(C{H}_3{)}_{3}CH\underset{\text{Oxidation}}{\overset{KMn{O}_4}{\to }}P$

$\text{Reaction 2:}C{H}_4+O_2\underset{}{\overset{Cu/523K/1atm}{\to }}Q$

1. P is Butane
2. P is 2-Methylpropan-2-ol
3. Q is methanal
4. Q is methanol

Q. Which gas is liberated when $A{l}_4{C}_3$ is hydrolysed ?

1. $C{H}_4$
2. $C_2{H}_2$
3. $C_2{H}_6$
4. $C{O}_2$

Q. $KOH$ is preferably used to absorb $C{O}_2$ gas because :

1. $KHC{O}_3$ is soluble in water and $NaHC{O}_3$ is sparingly soluble in water
2. $KOH$ is cheaper than $NaOH$
3. $KOH$ is more soluble than $NaOH$ in water
4. $KOH$ is stronger base than $NaOH$

Q. Among the following, the molecule that is bent/V-shape is/are:

1. $N{O}_2$
2. $Cl{O}_2$
3. $C{O}_2$
4. (b) and (c) above

Q. Assertion :Sodium and potassium carbonates are soluble in water but magnesium and calcium carbonates are insoluble in water. Reason: Lattice energy of Mg and Ca carbonates is much higher than sodium and potassium carbonate.

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

Q. The chloride that cannot get hydrolysed is :

JEE MAIN 2019

Q. Formation of polyethene from calcium carbide takes place as follows:
$Ca{C}_2+H_{2}O\to Ca(OH{)}_2+C_2{H}_2{C}_2{H}_2+H_2\to C_2{H}_4$
$n\left(C_2{H}_4\right)\to (-C{H}_2-C{H}_2-{)}_n$
The amount of polyethylene possibly obtainable from 64.0 kg $Ca{C}_2$ can be:

1. 28 kg
2. 32 kg
3. 14 kg
4. 56 kg

Q. Polyethylene is obtained from calcium carbide.
$Ca{C}_2+2H_{2}O⟶Ca{\left(OH\right)}_2+C_2{H}_2$
$C_2{H}_2+H_2⟶C_2{H}_4$
$n{C}_2{H}_4⟶(-C{H}_2-C{H}_2-{)}_n$
Therefore, the amount of polyethylene obtained for 64 kg $Ca{C}_2$ is:

1. 14 kg
2. 21 kg
3. 28 kg
4. 7 kg

Q. Methane cannot be prepared by hydrolysis of:

1. $A{l}_4{C}_3$
2. $B{e}_{2}C$
3. $Ca{C}_2$
4. $\text{All of these}$

Q. Assertion :$Xe{F}_4$ exists while $Xe{H}_4$ does not exist. Reason: In $Xe{H}_4$ d-orbital contraction is absent.

1. The Assertion is true, the Reason is true and Reason is the correct explanation for Assertion
2. The Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
3. Assertion is true, Reason is false.
4. Assertion is false, Reason is true.

Q. $Xe{F}_6$ on complete hydrolysis gives:

1. $Xe$
2. $Xe{O}_2$
3. $Xe{O}_3$
4. $Xe{O}_4$

Q. Select the correct structure.

1. $(C{H}_3{)}_{3}P=O$
2. $(C{H}_3{)}_{3}N=O$
3. Both (A) and (B)
4. None of these

Q. Which of the following is a false statement?

1. $B{H}_3$ is a electron deficient compound
2. Boron hydrides are formed when $H_{3}P{O}_4$ reacts with $M{g}_3{B}_2$
3. All the $B-H$ bond distances in $B_2{H}_6$ are equal
4. The boron hydrides are readily hydrolysed.

Q. 2$C{H}_{3}CO{O}^{-}N{a}^{+}+2H_{2}O\to C{H}_{3}C{H}_3+2C{O}_2+H_2+2NaOH$
The name of the above reaction is:

1. Sabatier-Senderens reaction
2. Wurtz reaction
3. Kolbe's electrolysis
4. Friedel-Crafts reaction

Q. Which of the following is not true regarding free radical intermediates?

1. They are $s{p}^2$ hybridised
2. They are formed by the homolytic cleavage of a bond
3. They are electron rich species
4. All of the above

Q. Formation of polyethylene from calcium carbide takes place as given below:
$Ca{C}_2+2H_{2}O\to Ca{\left(OH\right)}_2+C_2{H}_2$
$C_2{H}_2+H_2\to C_2{H}_4$
$n{C}_2{H}_4\to {(-C{H}_2-C{H}_2-)}_n$
The amount (in kg) of polyethylene obtained from $64.1$ kg of $Ca{C}_2$ is

1. $7$
2. $14$
3. $28$
4. $21$

Q. When pyrolusite is fused with $KOH$ and $KCl{O}_3$, we get:

1. $KMn{O}_4$
2. $K_{2}Mn{O}_4$
3. Both $KMn{O}_4$ and $K_{2}Mn{O}_4$
4. None of these

Q. Which of the following can be easily hydrolysed by water?

1. Both (a) and (b)
2. None of the above
3. $SiC{l}_4$
4. $CC{l}_4$

Q. $\left[Fe\right(H_{2}O{)}_6{]}^{3+}$ is called outer orbital complex.

Q. $Al(OH{)}_3$ is soluble in water.

1. True
2. False

Q. The molecule which is NOT hydrolysed by water at ${25}^o$C is?

1. $AlC{l}_3$
2. $B{F}_3$
3. $SiC{l}_4$
4. $S{F}_6$

Q. Two elements $X$ and $Y$ react separately with highly electropositive metal to form binary compounds, which upon hydrolysis yield a mixture of boranes and silanes. $X$ and $Y$ are _________ respectively

1. $B,Si$
2. $Si,B$
3. $Al,B$
4. $B,Al$

Q. When gypsum is totally dehydrated, what is the percentage weight loss?

Q. In the following reaction $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$ at constant temp. rate of backward reaction is increase by :

1. Inert gas mixed at constant volume
2. Inert gas mixed at constant pressure
3. $C{l}_2$ gas mixed at constant volume
4. $PC{l}_5$ mixed in constant volume.

Q. Identify (Z) in the reaction series,
$H_{2}C=C{H}_2\stackrel{HBr}{\to }\left(X\right)\stackrel{Hydrolysis}{\to }\left(Y\right)\stackrel{NaOH}{\underset{I_2\left(excess\right)}{\to }}\left(Z\right)$:

1. $C_2{H}_{5}I$
2. $C_2{H}_{5}OH$
3. $CH{I}_3$
4. $C{H}_{3}CHO$

Q. Explain the following.
"The first ionization energy of carbon atom is greater than that of boron whereas, the reverse is true for the second ionization energy".