Hydrogen Test

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Hydrogen Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

A good quality of water will have
A) high DO
B) high BOD
C) high COD

A
A

B
B & C

C
C & A

D
A, B, C
Question 2
1 / -0

In water-gas shift reaction, hydrogen gas is produced from the reaction of steam with:

A
methane

B
coke

C
carbon monoxide

D
carbon dioxide

Solution

Water-gas shift reaction explains the reaction of carbon monoxide and water vapour to form carbon dioxide and hydrogen:

$$CO+H_2O\rightarrow CO_2 + H_2$$
Hence option C is correct.
Question 3
1 / -0

High purity $$(>99.95\%)$$ dihydrogen is obtained by:

A
Electrolysis of acidified water using platinum electrodes

B
Electrolyzing warm aqueous barium hydroxide solution between nickel electrodes

C
Electrolysis of brine solution

D
Reaction of steam on hydrocarbons or coke at high temperature in the presence of catalyst

Solution
Question 4
1 / -0

A cell contains two hydrogen electrodes. The negative electrode is in contact with a solution of $$10^{-6}$$ M hydrogen ions. The EMF of the cell is 0.118 V at $$25^{\circ}C$$. The concentration of hydrogen ions at the positive electrode is

A
$$10^{-6}M$$

B
$$10^{-3}M$$

C
$$10^{-4}M$$

D
$$10^{-5}M$$

Solution

For a Concentration cell Nernst Equation is

$$Ecell= \frac{0.059}{n}log\frac{C_2}{C_1}$$

Given $$Ecell= 0.118V$$

Concentration of hydrogen ion at the positive electrode$$\left [ C_2 \right ]=Unknown$$
Concentration of hydrogen ion at the negetive elctrode $$\left [ C_1 \right ]=10^{-6}M$$

$$Ecell= \frac{0.059}{n}log\frac{C_2}{C_1}$$
$$0.118= \frac{0.059}{1}log\frac{C_2}{C_1}$$

$$log\frac{C_2}{C_1}=\frac{0.118}{0.059}$$

$$\frac{C_2}{C_1}= 10^{2}= 100$$

$$C_2=100\times 10^{-6}M=10^{-4}M$$

Hence the correct answer is [C]
Question 5
1 / -0

A solution of $$H_{2} O_{2}$$ is titrated with a solution of $$KMnO_{4}.$$ The reaction is
$$ 2MnO_{4}-+5H_{2}O_{2}+6H^{+}$$
$$ \rightarrow 2Mn^{2+}+5O_{2}+8H_{2}O$$
It requires $$50$$ ml of $$0.1$$ $$ M - KMnO_{4} $$ to oxidize $$10$$ ml of $$ H_{2}O_{2}.$$ The strength of $$ H_{2}O_{2} $$ solution is

A
$$4.25 (w/v)$$%

B
$$8.5 (w/v)$$%

C
$$0.85 (w/v)$$%

D
$$1.7 (w/v)$$%

Solution

we have balanced equation
$$ 2MnO_{4}^{\circleddash} + 5H_{2}O_{2}+ 6H^{\oplus } \rightarrow 2Mn^{2+}+5O_{2}+8H_{2}O$$

moles of oxidizing agent = moles of reducing $$ \times $$ stoichiometric Ratio
$$ 0.05 \times 0.1 = 0.01 \times M \times \left ( \dfrac{2}{5} \right )$$

$$ M = 1.25 \, molar $$

(ml.wt. of $$ H_{2}O_{2} = 34 $$ )

wt. of $$ H_{2}O_{2} = 1.25 \times 34 = 42.5 gm$$

strength (gm/m) $$= \dfrac{42.5 gm}{1000 ml} \times 100 = 4.25 \%$$

$$ = 4.25\% $$

Ans- option (A)
Question 6
1 / -0

Hydrogen can be prepared by mixing steam and water gas at $$673 K$$ in the presence of $$Fe_2O_3$$ and $$Cr_2O_3$$. This process is called:

A
Nelson's process

B
Bosch's process

C
Serpeck's process

D
Parke's process

Solution

$$CO_{(g)}+H_2O_{(g)}\xrightarrow[Fe_2O_3/Cr_2O_3]{673K}CO_{2_{(g)}}+H_{2_{(g)}}$$
(Catalyst)

This is called water-gas shift reaction or Bosch's process.
Question 7
1 / -0

$$H_2$$ gas is usually prepared by the reaction of

A
$$Zn+dil.HCl$$

B
$$Zn+dil.H_2SO_4$$

C
$$Zn+NaOH$$

D
All of these

Solution
Question 8
1 / -0

$$H_2O_2$$ is manufactured these days...

A
By the action of $$H_2SO_4$$ on $$Na_2O_2$$

B
By the action of $$H_2O_2$$ on $$BaO_2$$

C
By electrolysis of $$50\%\ H_2SO_4$$

D
By burning hydrogen in excess of oxygen

Solution

Electrolysis of $$50\%$$ sulphuric acid gives per disulphuric acid, represented as $$H_2S_2O_8$$, which on distillation with water yields $$30\%$$ solution of hydrogen peroxide as follows :

$$H_2S_2O_8 + 2H_2O\rightarrow 2H_2SO_4 + H_2O_2$$

Hence, option (C) is correct.
Question 9
1 / -0

Which of the following statement is correct for ionic hydrides?

A
The ionic hydrides are crystalline

B
The ionic hydrides are non-volatile

C
The ionic hydrides are non-conducting in solid state

D
All the correct

Solution
Question 10
1 / -0

Which of the following properties of water leads in comparison to $$H_2S$$ and $$H_2Se$$ due to H-bonding?

A
Low freezing point

B
Low boiling point

C
Low heat of vaporization

D
High heat of fusion

Solution

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Hydrogen Test - 68

Result

Hydrogen Test - 68

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SHARING IS CARING

Question 1

A

B & C

C & A

A, B, C

Question 2

methane

coke

carbon monoxide

carbon dioxide

Solution

Question 3

Electrolysis of acidified water using platinum electrodes

Electrolyzing warm aqueous barium hydroxide solution between nickel electrodes

Electrolysis of brine solution

Reaction of steam on hydrocarbons or coke at high temperature in the presence of catalyst

Solution

Question 4

$$10^{-6}M$$

$$10^{-3}M$$

$$10^{-4}M$$

$$10^{-5}M$$

Solution

Question 5

$$4.25 (w/v)$$%

$$8.5 (w/v)$$%

$$0.85 (w/v)$$%

$$1.7 (w/v)$$%

Solution

Question 6

Nelson's process

Bosch's process

Serpeck's process

Parke's process

Solution

Question 7

$$Zn+dil.HCl$$

$$Zn+dil.H_2SO_4$$

$$Zn+NaOH$$

All of these

Solution

Question 8

By the action of $$H_2SO_4$$ on $$Na_2O_2$$

By the action of $$H_2O_2$$ on $$BaO_2$$

By electrolysis of $$50\%\ H_2SO_4$$

By burning hydrogen in excess of oxygen

Solution

Question 9

The ionic hydrides are crystalline

The ionic hydrides are non-volatile

The ionic hydrides are non-conducting in solid state

All the correct

Solution

Question 10

Low freezing point

Low boiling point

Low heat of vaporization

High heat of fusion

Solution

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