Preparation of Hydrogen from Steam

Q.

Translate the statement into chemical equation and then balance:

Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Q.

When steam is passed over the red-hot coke then which of the following is formed:-

1. Biogas

2. Mixture of $CO$ and $H_2$

3. Producer gas

4. Water gas

Q.

Give the chemical equation for the production of water gas.

Q.

Is it possible to heat a metal to such an extent that it becomes a gas ?

Q.

Which substance is reduced in the fiven reaction?

ZnO + C → Zn + CO

1. Zinc

2. Zinc oxide

3. Carbon

4. Carbon monoxide

Q. Zinc upon reaction with steam forms zinc oxide and .

1. zinc hydroxide
2. water vapour
3. oxygen gas
4. hydrogen gas

Q.

Which metal is preferred for preparation of hydrogen

(i) from water ?

(ii) from acid ?

Q.

When reacting with steam, which of the following metals shows the fastest rate of reaction?

1. Aluminium

2. Zinc

3. Iron

4. Magnesium

Q.

(i) Under what conditions iron reacts with water.

(ii) Give the balanced equation of the reaction.

(iii) What is noticed if the products are not allowed to escape ?

Q.

Give equation to express the reaction between :

(a) steam and red hot iron

(b) calcium and water

Q.

Ammonium chloride on thermal dissociation gives:

1. ammonia gas and hydrochloric acid(l)

2. ammonia gas and hydrogen chloride gas

3. ammonia(l) and hydrogen chloride gas

4. ammonia liquid and hydrochloric acid liquid

Q. Red hot coke reacts with steam to form hydrogen and .

1. carbon monoxide
2. carbon dioxide
3. methane
4. water

Q.

From the following metals, which is/are stored in kerosene oil?

1. Magnesium

2. Aluminium

3. Sodium

4. Potassium

Q. What is chemical reaction of potassium

Q. Why do we rub magnesium ribbon with a cloth before heating?

Q.

Metals such as Sodium and Potassium are kept immersed in Kerosene. Why?

Q.

The lightest metal in the periodic table -

1. Ca

2. Li

3. Na

4. Hg

Q. Write the balanced chemical equation for the following and identify the type of reaction in each case:
Iron (III) oxide (s) + Carbon monoxide( g ) → Iron(s) + Carbon dioxide( g )

Q. balance the following equations:-
carbon monoxide+hydrogen gas->methanol.
ferrous sulphate->ferric oxide+sulphur dioxide+sulphur trioxide.
iron+steam->magnetic oxide of iron+ hydrogen gas
methane + oxygen gas-> carbon dioxide+ water
zinc+ dilute sulphuric acid-> zinc sulphate+ hydrogen gas
zinc oxide + carbon -> zinc +carbon monoxide

Q.

Experimental setup for reactions which involves gas as a product should be undertaken in a closed setup. True/False.

1. True

2. False

Q. Question 41(c)
Compound X and aluminium are used to join railway tracks. Write down its reaction.

Q. What are the products formed when zinc reacts with steam?

1. Zinc oxide and oxygen
2. Zinc hydroxide and oxygen
3. Zinc oxide and hydrogen
4. Zinc hydroxide and hydrogen

Q. Complete the following reaction.

$\mathrm{Fe}\left(s\right)+H_{2}O\left(\mathrm{steam}\right)\rightleftharpoons H_2\left(g\right)+$.

1. ${\mathrm{Fe}}_2{O}_3\left(s\right)$
2. ${\mathrm{Fe}}_3{O}_4\left(s\right)$
3. $\mathrm{FeO}\left(s\right)$

Q.

A new metal X is discovered and it is found to be between potassium and sodium in the activity series.
State the reactions (if any) that would take place when the following experiments are carried out with the compounds of X. Give balanced equations wherever possible.
i. the carbonate is heated.
ii. the nitrate is heated.
iii. the oxide is heated.
iv. the hydroxide is heated.

Q.

Question 46
A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.

Q.

The balanced chemical equation for the reaction of zinc metal with hydrochloric acid is:

1. 

2. 

3. 

4. 

Q.

Do non metals react with water?

Q.

When steam is passed over red hot coke, what is produced?

1. Carbon monoxide and hydrogen

2. Carbon Dioxide and Hydrogen

3. Water gas

4. Syngas

Q. Water gas is produced by passing steam over red hot ______.

1. coke
2. sulphur
3. phosphorus
4. iodine

Q. Red hot coke reacts with steam to form hydrogen and .

1. carbon monoxide
2. carbon dioxide
3. methane
4. water