Hydrogen Peroxide

Q.

Name the oxidising and reducing agents in the reaction:

CuO + H₂ → Cu + H₂O

Q.

How is the equation for ${\mathrm{CuSO}}_4+{\mathrm{H}}_2\mathrm{O}$determined?

Q. The bond order and magnetic behaviour of $O_2^{-}$ ion are, respectively:

1. 1.5 and diamagnetic
2. 1.5 and paramagnetic
3. 1 and paramagnetic
4. 2 and diamagnetic

Q.

Hydrogen peroxide and water contains 5.93% and 11.2% hydrogen respectively. Show that the data illustrates law of multiple proportions?

Q. In Haber’s process, hydrogen is obtained by reacting methane with steam in presence of \(\text{NiO}\) as catalyst. The process is known as steam reforming. Why is it necessary to remove \(CO\) when ammonia is obtained by Haber’s process?

Q.

Is this reaction a double displacement reaction? ${\mathrm{CH}}_3\mathrm{COOH}\left(\mathrm{aq}\right)+{\mathrm{NaHCO}}_3\left(\mathrm{s}\right)\to {\mathrm{CH}}_3\mathrm{COONa}\left(\mathrm{aq}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Q.

Mole fraction of ethyl alcohol in aqueous ethyl alcohol solution is 0. 25 hence the percentage of ethyl alcohol by weight is:

Q. In which of the following reaction(s) $H_2{O}_2$ acts as a reducing agent?

1. $H_2{O}_2+2H^{+}+2e^{-}⟶2H_{2}O$
2. $H_2{O}_2\underset{-2e^{-}}{⟶}{O}_2+2H^{+}$
3. $H_2{O}_2+2e^{-}⟶2O{H}^{-}$
4. $H_2{O}_2+2O{H}^{-}\underset{-2e^{-}}{⟶}{O}_2+2H_{2}O$

Q.

What happens when SiO₂ reacts with NaOH?

Q.

Which of the following statements about the given reaction are correct?

$3\mathrm{Fe}\left(\mathrm{s}\right)+4{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\to {\mathrm{Fe}}_3{\mathrm{O}}_4\left(\mathrm{s}\right)+4{\mathrm{H}}_2\left(\mathrm{g}\right)$

(i) Iron metal is getting oxidised

(ii) Water is getting reduced

(iii) Water is acting as a reducing agent

(iv) Water is acting as an oxidising agent

1. (i), (ii) and (iii)

2. (iii) and (iv)

3. (i), (ii) and (iv)

4. (ii) and (iv)

Q.

Give the reaction between sulfur dioxide with water.

Q. Bleaching action of $H_2{O}_2$ is due to its:

1. Oxidising nature
2. Reducing nature
3. Acidic nature
4. Thermal instability

Q. Why H2O2 cannot be stored in glass bottle?

Q.

Give chemical equations for reaction of copper sulphate with excess of ${\mathrm{NH}}_4\mathrm{OH}$

Q.

Identify the reducing agent in the following reaction: $2{\mathrm{H}}_2+{\mathrm{O}}_2\to 2{\mathrm{H}}_2\mathrm{O}$

Q. An iodized salt contains 0.5 $\%$ of NaI. A person consumes 3 gm of salt every day. The number of iodide ions going into his body every day is

1. 
2. 
3. 
4. 

Q.

The volume of oxygen liberated from 15 ml of 20 volume $H_2{O}_2$ is

1. 250 ml

2. 300 ml

3. 150 ml

4. 200 ml

Q. What will be the dihedral angle present in hydrogen peroxide $\left(H_2{O}_2\right)$ in solid phase.

1. ${111.5}^{\circ }$
2. ${180}^{\circ }$
3. ${90.0}^{\circ }$
4. $0^{\circ }$

Q.

What is a double decomposition reaction? Give an example each for neutralization and precipitation reactions.

Q. Synergic bonding in metal carbonyl complexes [M = Metal]:

1. Decreases the $C-O$ bond strength
2. Increases the $M-C$ bond strength
3. Increases the bond order for $M-C$ bond
4. Changes the geometry of the complex

Q. Of the given anions, the strongest Bronsted base is

1. $Cl{O}^{-}$
2. $Cl{O}_2^{-}$
3. $Cl{O}_3^{-}$
4. $Cl{O}_4^{-}$

Q. $34g$ hydrogen peroxide is present in $1120mL$ of the solution. The volume strength of $H_2{O}_2$ is :

1. 10 V
2. 20 V
3. 30 V
4. 32 V

Q.

The most abundant elements by mass in the body of a healthy human adult are:
Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all 1H atoms are replaced by 2H atoms is_______.

Q. Alkene $C{H}_3-CH=C{H}_2$ reacts readily with $B_2{H}_6$ and the product on oxidation with alkaline hydrogen peroxides produces:

1. $C{H}_3-\stackrel{O}{\stackrel{||}{C}}-C{H}_3$
2. $C{H}_3-\stackrel{OH}{\stackrel{|}{C}H}-C{H}_3$
3. $C{H}_3-\stackrel{OH}{\stackrel{|}{C}H}-\stackrel{OH}{\stackrel{|}{C}}{H}_2$
4. $C{H}_3-C{H}_2-C{H}_2-OH$

Q. At what pH oxidation potential of water is $-0.81V$? ( Standard oxidation potential of water = -1.23 V)

Q.

Which one acts as both oxidising as well as reducing agent?

1. HNO₃

2. HNO₂

3. H₂SO₄

4. HCl

Q.

How does $H_2{O}_2$ behave as a bleaching agent?

Q. Why concentrate H2SO4 and HNO3 are strong oxidising agent?

Q. can slow down the decomposition of hydrogen peroxide.

1. Sunlight
2. Urea
3. Dust

Q.

${\mathrm{H}}_2{\mathrm{O}}_2$ acts as a bleaching agent. Explain?