From the following statements regarding H 2 O 2 , choose the incorrect statement:

It can act only as an oxidising agent

It decomposes on exposure to light

It has to be stored in plastic or wax lined glass bottles in dark

It has to be kept away from dust

Physical properties in which D 2 O differs from H 2 O is/are:

solubility of salts in heavy water is less than in ordinary water

all physical constants of D 2 O are higher than H 2 O.

heavy water is almost 11% denser than light (normal) water.

Chemistry - Hydrogen - Quiz-5

$H_{2} O_{2}$ act as a reducing agent in :

0%

Reaction with a ferrous salt
0%

Reaction with iodides
0%

Reaction with lead sulphide
0%

Reaction with ${KMnO}_{4}$ in an acid medium

$H_{2} O_{2}$ turns an acidified solution of ........... to orange-red.

0%

$B a O_{2}$
0%

$P b O_{2}$
0%

$N a_{2} O_{2}$
0%

$T i O_{2}$

$H_{2} O_{2}$ cannot be formed by which of the following reaction?

0%

Electrolysis of 50% $H_{2} S O_{4} (a q .)$
0%

Hydrolysis of $H_{2} S O_{5}$
0%

Action of $H_{2} O o n B a O_{2}$
0%

Action of $H_{2} O o n M n O_{2}$

The correct statement among the following regarding H₂O₂is-

0%

Two hydrogen atoms are connected to one oxygen atom
0%

All the four atoms are in the same plane
0%

The four atoms are arranged in a non-linear and non-planar manner
0%

O-H bonds are polar but the molecule is non-polar

The oxidising nature of $H_{2} O_{2}$ is shown in the reaction-

0%

$H_{2} O_{2} + 2 KI \to 2 KOH + I_{2}$
0%

${Cl}_{2} + H_{2} O_{2} \to 2 HCl + O_{2}$
0%

$H_{2} O_{2} + {Ag}_{2} O \to 2 Ag + H_{2} O + O_{2}$
0%

$NaClO + H_{2} O_{2} \to NaCl + H_{2} O + O_{2}$

$H_{2} O_{2}$ on treatment with chlorine gives:

0%

$H_{2}$
0%

oxygen
0%

HOCl
0%

$C l O_{2}$

For the bleaching of hair, the substance used is:

0%

${SO}_{2}$
0%

Bleaching powder
0%

$H_{2} O_{2}$
0%

$O_{3}$

Decolourisation of acidified potassium permanganate by $H_{2} O_{2}$ is due to:

0%

Oxidation of ${KMnO}_{4}$
0%

Reduction of ${KMnO}_{4}$
0%

Both oxidation and reduction of ${KMnO}_{4}$
0%

None of the above

$H_{2} O_{2} r e d u c e s K_{3} [F e {(C N)}_{6}] i n :$

0%

neutral solution
0%

acidic solution
0%

alkaline solution
0%

non-polar medium

Tellurium hydride on dissolution in water gives:

0%

$H_{2} T e + H_{2} O ⇌ H_{3} O^{+} + H T e^{-}$
0%

$H_{2} T e + H_{2} O ⇌ H_{3} T e^{+} + O H^{-}$
0%

$H_{2} T e + H_{2} O \to T e O + 2 H_{2}$
0%

None of these

Reaction among the following where $H_{2} O_{2}$ acts as a reducing agent is-

a. $H_{2} O_{2} + 2 H^{+} + 2 e^{-} \to 2 H_{2} O$

b. $H_{2} O_{2} - 2 e^{-} \to O_{2} + 2 H^{+}$

c. $H_{2} O_{2} + 2 e^{-} \to 2 {OH}^{-}$

d. $H_{2} O_{2} + 2 {OH}^{-} - 2 e^{-} \to O_{2} + 2 H_{2} O$

0%

a, b
0%

c, d
0%

a, c
0%

b, d

Hydrogen peroxide in its reaction with ${KIO}_{4} and {NH}_{2} OH$ respectively is acting as a

0%

reducing agent, oxidising agent
0%

reducing agent, reducing agent
0%

oxidising agent, oxidising agent
0%

oxidising agent, reducing agent

Calcium carbide with heavy water generates-

0%

$Ca {(OH)}_{2}$
0%

$C_{2} D_{2}$
0%

$D_{2} O_{2}$
0%

${CaD}_{2}$

From the following statements regarding H₂O₂, choose the incorrect statement:

0%

It can act only as an oxidising agent
0%

It decomposes on exposure to light
0%

It has to be stored in plastic or wax lined glass bottles in dark
0%

It has to be kept away from dust

Hydrogen peroxide is now generally prepared on industrial scale by the:

0%

Action of H₂SO₄ on barium peroxide
0%

Action of H₂SO₄ on sodium paraoxide
0%

Electrolysis of 50% H₂SO₄
0%

Burning hydrogen in excess of oxygen

$H_{2} O_{2}$ functions as a

0%

Bleaching agent
0%

Oxidising agent
0%

Oxidant for a rocket fuel
0%

All of the above

$Fe + H_{2} O \overset{1023 - 1073 K}{\to} Product (Steam) Product formed is 1 . FeO + H_{2}$

0%

$1 . FeO + H_{2}$
0%

${Fe}_{2} O_{3} + H_{2} O$
0%

${Fe}_{2} O_{3} + H_{2}$
0%

${Fe}_{3} O_{4} + H_{2}$

A compound that can remove both temporary and permanent hardness of water is -

0%

${NaHCO}_{3}$
0%

Boiling
0%

$Ca {(OH)}_{2}$
0%

${Na}_{6} P_{6} O_{18}$

An isotope that is used as a tracer in a chemical reaction is-

0%

$H_{1}^{1}$
0%

$H_{1}^{2}$
0%

$H_{1}^{3}$
0%

Ortho hydrogen

Calgon ( a water softener) is :

0%

${Na}_{2} [{Na}_{4} {({PO}_{3})}_{6}]$
0%

${Na}_{4} {[{Na}_{2} ({PO}_{3})]}_{6}$
0%

${Na}_{2} {[{Na}_{4} ({PO}_{4})]}_{6}$
0%

${Na}_{4} {[{Na}_{2} ({PO}_{4})]}_{6}$

Match the following and identify the correct option

(a) CO(g)+H₂(g) (i) Mg(HCO₃)₂+Ca(HCO₃)₂

(b) Temporary hardness of water (ii) An electron deficient hydride

(d) H₂O₂ (iv) Non-planar structure

(a) (b) (c) (d)

0%

(iii) (ii) (i) (iv)
0%

(iii) (iv) (ii) (i)
0%

(i) (iii) (ii) (iv)
0%

(iii) (i) (ii) (iv)

The percentage by weight of Hydrogen of $H_{2} O_{2}$ is:

0%

5.88
0%

6.25
0%

25
0%

50

Hard water can be produced by -

0%

Saturation of water with CaSO₄
0%

Addition of $N a_{2} S O_{4}$ to water
0%

Saturation of water with CaCO₃
0%

Saturation of water with MgCO₃

The amount of $H_{2} O_{2}$ present in 1 L of 1.5 N $H_{2} O_{2}$ solution is:

0%

2.5 g
0%

25 g
0%

3.0 g
0%

8.0 g

Choose reactions to explain the amphoteric nature of water.

$1) H_{2} O (l) + {NH}_{3} (aq) \to {OH}^{-} (aq) + {NH}_{4}^{+} (aq) 2) H_{2} O (l) + H_{2} S (aq) \to H_{3} O^{+} (aq) + {HS}^{-} (aq) 3) a & b 4) none$

0%
1
0%
2
0%
3
0%
4

Atomic hydrogen combines with almost all elements but molecular hydrogen does not because

0%

Atomic hydrogen is highly unstable molecular, hydrogen is almost inert at room temperature.
0%

Atomic hydrogen is highly inert, molecular hydrogen is almost unstable at room temperature.
0%

Atomic hydrogen and molecular hydrogen are unstable.
0%

Atomic hydrogen and molecular hydrogen are inert.

Physical properties in which D₂O differs from H₂O is/are:

0%

solubility of salts in heavy water is less than in ordinary water
0%

all physical constants of D₂O are higher than H₂O.
0%

heavy water is almost 11% denser than light (normal) water.
0%

all of the above.

Industrial preparation of $H 2 O 2$ is-

0%

By the action of dilute sulphuric acid: $B a O 2 . 8 H 2 O (s) + H 2 S O 4 (a q) \to B a S O 4 (s) + H 2 O 2 (a q) + 8 H 2 O (l)$
0%

By the action of carbon dioxide: $B a O 2 + H 2 O + C O 2 \to B a C O 3 + H 2 O 2 $
0%

By the action of phosphoric acid: $3 B a O 2 + 2 H 3 P O 4 \to B a 3 (P O 4 ) 2 + 3 H 2 O 2 $
0%

$H_{2} O_{2} + 2 ethylanthraquinol ⇌_{H_{2} / Pd}^{O_{2} (air)} H_{2} O_{2} + Oxidised Products$

Hydrogen is placed separately in the periodic table because :

0%

It resembles alkali metals.
0%

It shows the same reactions as halogens.
0%

Both (1) and (2)
0%

None of the above.

NH₃ is an example of :

0%

Electron rich hydride
0%

Electron-precise hydride
0%

Electron deficient hydride
0%

None of the above

0:0:1

Practice Chemistry Quiz Questions and Answers

0:0:1

Practice Chemistry Quiz Questions and Answers

Support mcqexams.com by disabling your adblocker.