Hydrogen Test

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Hydrogen Test - 39

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following will be decomposed into hydrogen by metals like $$Fe,Sn,Ni$$?

A
Cold water

B
Boiling water

C
Steam

D
All of these

Solution

$$Fe,Sn,Ni$$ are not easily oxidised so,it is a poor reducing agent and can not reduce cold and boiling water.It can just reduce steam.Steam is the easiest to reduce.
Question 2
1 / -0

Electrolysis of acidified water using platinum electrodes gives ________.

A
oxygen and hydrogen peroxide

B
hydrogen and oxygen

C
hydrogen peroxide

D
hydrogen and hydrogen peroxide

Solution

The electrolyte is dilute sulphuric acid (= acidified water) which, during electrolysis is split into hydrogen and oxygen gases.
Electrolysis (of acidified water) is a way of splitting up (decomposition) of the compound (water) using electrical energy. The electrical energy comes from a d.c. (direct current) battery or power pack supply. A conducting liquid, containing ions, called the electrolyte (dilute sulphuric acid), must contain the compound (water) that is being broken down. The electricity must flow through electrodes dipped into the electrolyte to complete the electrical circuit with the battery. Electrolysis can only happen when the circuit is complete, and an electrical current (electricity) is flowing, then the products of electrolysing dil. sulfuric acid are released on the electrode surfaces where they can be collected. Electrolysis always involves a flow of electrons in the external wires and electrodes and a flow of ions in the electrolyte and there is always a reduction at the negative cathode electrode (which attracts positive ions, cations) and an oxidation at the positive anode electrode (which attracts negative ions, anions) and it is the ions which are discharged to give the products.
Question 3
1 / -0

In the laboratory preparation of Dihydrogen,which of the following species is oxidised?

A
$$Zn$$

B
$$H_2$$

C
Both A and B

D
None

Solution

The chemical reaction for laboratory preparation of water is shown below:
$$Zn + H_2SO_4 \longrightarrow ZnSO_4 + H_2$$,or
$$Zn + HCl \longrightarrow ZnCl_2 + H_2$$
This shows that in either case,$$Zn$$ is being oxidised.
Question 4
1 / -0

Which is the correct combination of products collected over anode and cathode respectively in order to prepare hydrogen by electrolysis of water?

A
$$O_2,H_2$$

B
$$H_2,O_2$$

C
$$Na,O_2$$

D
$$O_2,Na$$

Solution

Electrolysis of water is the decomposition of water $$(H_2O)$$ into oxygen$$(O_2)$$ and hydrogen gas $$(H_2)$$ due to an electric current being passed through the water.
$$O_2$$ is collected at anode and $$H_2$$ is collected at cathode.
Option A is correct.
Question 5
1 / -0

Which is NOT a commercial method for preparation of Dihydrogen?

A
Lane's Process

B
Thermal cracking of natural gas

C
Reacting metals with dilute mineral acids

D
Syngas-Bosch Process

Solution

Lane's Process, Thermal cracking of natural gas and Syngas-Bosch Process are all the commercial methods for the preparation of dihydrogen.
Question 6
1 / -0

In the laboratory preparation of dihydrogen, which of the following species is reduced?

A
$$Zn^+$$

B
$$H^+$$

C
Both $$A$$ and $$B$$

D
None of the above

Solution

The chemical reaction for laboratory preparation of water is shown below:
$$Zn + H_2SO_4 \longrightarrow ZnSO_4 + H_2$$,or
$$Zn + HCl \longrightarrow ZnCl_2 + H_2$$
This shows that in either case,$$H^+$$ is being reduced to $$H_2$$.
Question 7
1 / -0

In the Lane's process for the manufacture of hydrogen the reagents used in oxidation-reduction process are respectively:

A
$$Fe/H_2O$$ and water gas

B
$$Fe_3O_4\ and\ H_2$$

C
$$O_2\ and\ H_2$$

D
$$Fe/H_2O$$ and $$Fe_3O_4 $$

Solution

The Lane's process involves following reactions:-
$$3Fe+4H_2O\longrightarrow Fe_3O_4+4H_2$$
$$Fe_3O_4+CO\longrightarrow 3Fe+CO_2$$
water
gas
Net reaction :- $$CO+H_2O\longrightarrow CO_2+H_2$$
The iron and steam are used to produce $$Fe_3O_4$$ & $$H_2$$ which then reacts with water gas to liberate $$CO_2$$ and produce fresh iron which again reacts with steam & the process goes on. It is called Lane's process for manufacturing of hydrogen gas.
Thus the answer is option (A) $$Fe/H_2O$$ and water gas.
Question 8
1 / -0

Which of the following method produces $$H_2$$ as By-product?

A
Petroleum Cracking in plants

B
In Electrolysis of Brine

C
Microbial Biomass conversion

D
All the above

Solution

Petroleum Cracking in plants,Microbial Biomass conversion and Electrolysis of Brine,all the three processes produces $$H_2$$ as by-product.
Question 9
1 / -0

Which of the one is correct about Hydrogen?

A
resembles in IA since it forms monovalent cation $$H^+$$.

B
resembles in VIIA (halogen family) since it forms monovalent anion $$H^-$$.

C
resembles in IVA(carbon family) since both have a half filled shell of electron.

D
all of the above

Solution

In HCl, H has + 1 oxidation state so it resembles IA group property.

In NaH, H has -1 oxidation state so it resembles VIIA group property.

H due to half-filled s shell of electron it resembles IVA group property.

So option D is the correct answer.
Question 10
1 / -0

Temporary hardness is caused due to the presence of:

A
magnesium sulphate

B
magnesium chloride

C
calcium sulphate

D
magnesium carbonate

Solution

Temporary hardness is caused due to the presence of carbonates of calcium and magnesium which can be removed by boiling the water.

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Hydrogen Test - 39

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Hydrogen Test - 39

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SHARING IS CARING

Question 1

Cold water

Boiling water

Steam

All of these

Solution

Question 2

oxygen and hydrogen peroxide

hydrogen and oxygen

hydrogen peroxide

hydrogen and hydrogen peroxide

Solution

Question 3

$$Zn$$

$$H_2$$

Both A and B

None

Solution

Question 4

$$O_2,H_2$$

$$H_2,O_2$$

$$Na,O_2$$

$$O_2,Na$$

Solution

Question 5

Lane's Process

Thermal cracking of natural gas

Reacting metals with dilute mineral acids

Syngas-Bosch Process

Solution

Question 6

$$Zn^+$$

$$H^+$$

Both $$A$$ and $$B$$

None of the above

Solution

Question 7

$$Fe/H_2O$$ and water gas

$$Fe_3O_4\ and\ H_2$$

$$O_2\ and\ H_2$$

$$Fe/H_2O$$ and $$Fe_3O_4 $$

Solution

Question 8

Petroleum Cracking in plants

In Electrolysis of Brine

Microbial Biomass conversion

All the above

Solution

Question 9

resembles in IA since it forms monovalent cation $$H^+$$.

resembles in VIIA (halogen family) since it forms monovalent anion $$H^-$$.

resembles in IVA(carbon family) since both have a half filled shell of electron.

all of the above

Solution

Question 10

magnesium sulphate

magnesium chloride

calcium sulphate

magnesium carbonate

Solution

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