Oxoacids of Halogens

Q. The correct statement(s) regarding, (i) $HClO$, (ii) $HCl{O}_2$, (iii) $HCl{O}_3$ and (iv) $HCl{O}_4$ , is (are)

1. The number of Cl = O bonds in (ii) and (iii) together is two
2. The number of lone pairs electrons on Cl in (ii) and (iii) together is three.
3. The hybridization of Cl in (iv) is $s{p}^3$
4. Amongst (i) to (iv), the strongest acid is (i).

Q. Which of the following compound give same $S_{N}1$ and $S_{N}2$ product ?

1. 
2. 
3. 

4. 

Q.

What does the passing of carbon dioxide through slaked lime give?

Q.

What is the color of lead oxide when hot and when it is cold?

Q.

C₁₂H₂₂O₁₁ + Conc. H₂SO₄ $\to$

The product of the given reaction is.

Q.

During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

1. Absorb the evolved gas

2. Moisten the gas

3. Absorb moisture from the gas

4. Absorb Cl^- ions from the evolved gas

Q.

Explain why fluorine forms only, one oxo-acid, HOF?

Q. Consider the molecules $C{H}_4,N{H}_3,\text{and}{H}_{2}O$. Which of the given statements is false?

1. The $H-C-H$ bond angle in $C{H}_4$, the $H-N-H$ bond angle in $N{H}_3$, and the $H-O-H$ bond angle in $H_{2}O$ are all greater than ${90}^o$
2. The $H-O-H$ bond angle in $H_{2}O$ is larger than the $H-C-H$ bond angle in $C{H}_4$
3. The $H-O-H$ bond angle in $H_{2}O$ is smaller than the $H-N-H$ bond angle in $N{H}_3$
4. The $H-C-H$ bond angle in $C{H}_4$ is larger than the $H-N-H$ bond angle in $N{H}_3$

Q.

Why Nitration of Aniline Is Difficult?

Q. Value of standard electrode potential for the oxidation of $C{l}^{-}$ ions is more positive than that of water, even then the electrolysis of aqueous sodium chloride, why is $C{l}^{-}$ oxidised at anode instead of water?

Q. Tetraaminecopper(II) ion is a square planar complex with one unpaired electron. According to valence bond theory the hybrid state of copper should be

1. $s{p}^3$
2. $ds{p}^2$
3. $ds{p}^3$
4. $d^{2}s{p}^3$

Q. In catalytic acidic medium, the rate of reaction between $Br{O}_{3^{-}}$ and $B{r}^{-}$ ions is given by the expression $-\frac{d\left[Br{O}_3^{-}\right]}{dt}=k\left[Br{O}_3^{-}\right]\left[B{r}^{-}\right][H^{+}{]}^2$

Now consider the statements
(I) Rate constant for the reaction does not depend upon the concentration of $B{r}^{–}$ ions
(II) Rate of reaction is independent of the concentration of acid added
(III) The change in $pH$ of the solution will affect the rate of reactions
The incorrect statements is/are

1. I, II & III
2. II only
3. I only
4. I & II only

Q. What is the order of the oxidizing power of perhalates?

1. $I{O}_4^{-}<Br{O}_4^{-}<Cl{O}_4^{-}$
2. $Cl{O}_4^{-}<Br{O}_4^{-}<I{O}_4^{-}$
3. $Cl{O}_4^{-}<I{O}_4^{-}<Br{O}_4^{-}$
4. $Br{O}_4^{-}<Cl{O}_4^{-}<I{O}_4^{-}$

Q.

Write the name of the Compound ${\mathrm{K}}_2{\mathrm{SO}}_4$.

Q.

Which electrode: anode or cathode is the oxidising electrode? Why?

Q. The positive value of the standard electrode potential of $C{u}^{2+}/Cu$ indicates that ___.

1. this redox couple is a stronger oxidising agent than $H^{+}/H_2$ .
2. this redox couple is a stronger reducing agent than the $H^{+}/H_2$ couple.
3. Cu cannot displace $H_2$ from acid.
4. Cu can displace $H_2$ from acid.

Q. Fluorine forms more than one oxoacid - True or False?

1. False
2. True

Q. Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry.

Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

1. $C{l}_{2}O$
2. $C{l}_2{O}_7$
3. $Cl{O}_2$
4. $C{l}_2{O}_6$

Q. Which of the following is not anodic reaction in an electrochemical series?

1. $C{l}^{-}\to Cl+e^{-}$
2. $H^{+}+e^{-}\to H$
3. $Cu\to C{u}^{2+}+2e^{-}$
4. $Ag-e^{-}\to A{g}^{+}$

Q. $S_1:B{F}_3\text{has planar geometry}$
$S_2:B{F}_3\text{is volatile liquid even at room temperature}$
$S_3:B{F}_3\text{is Lewis acid}$
$S_4:B{F}_3\text{forms adduct with}N{H}_3$

Choose the correct option.

1. F T T T
2. T F T T
3. F F T T
4. F T T F

Q. what do all the acids have in common?

Q. 39. Which one is more acidic and why , propanoic acid and propenoic acid

Q. Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and salt of acid ?

1. Phenol
2. Benzaldehyde
3. Butanal
4. Benzoic acid

Q. Bond order of $H{e}_2,H{e}_2^{+}$ and $H{e}_2^{2+}$ are respectively:

1. $1,\frac{1}{2},0$
2. $0,\frac{1}{2},1$
3. $\frac{1}{2},1,0$
4. $1,0,\frac{1}{2}$

Q.

Discuss the other methods of preparation of carbon dioxide.

Q.

Which of the following is formed in reaction mechanism of halogenation of alkanes in presence of UV light?

1. Free radical

2. Diazonium ion

3. Carbanion

4. Carbocation

Q. $H_2{O}_2$ acts as an oxidising agent in:

1. acidic medium
2. neutral medium
3. alkaline medium
4. acidic as well as alkaline medium

Q. Paragraph 2
The reactions of $C{l}_2$ gas with cold-dilute and hot-concentrated NaOH in water give soduum salts fo two different oxoacids of chlorine, P and Q, respectively. The $C{l}_2$ gas reacts with $S{O}_2$ gas, in presence of charcoal, to give a product R reacts with white phosphorus to give a compound S. On hydrolysis, S gives an oxoacid of phosphorus.

4. R, S and T, respectively, are
(IIT-JEE, 2013)

1. $SOC{l}_2,PC{l}_{3}and{H}_{3}P{O}_2$
2. $S{O}_{2}C{l}_2,PC{l}_{3}and{H}_{3}P{O}_3$
3. $SOC{l}_2,PC{l}_{5}and{H}_{3}P{O}_4$
4. $S{O}_{2}C{l}_2,PC{l}_{5}and{H}_{3}P{O}_4$

Q.

Rewrite the statement in the correct form using the appropriate word/words

Magnesium reacts with Nitric acid to liberate hydrogen gas.

Q.

Why is HCI a stronger acid than acetic acid?