The following ionic equations represent changes that occur during electrolysis: 2 C l - → C l 2 + 2 e - C u 2 + + 2 e - → C u C u → C u 2 + + 2 e - 2 H + + 2 e - → H 2 4 H O - → 2 H 2 O + O 2 + 4 e - Write two equations that show the processes that occur when diluting sulphuric acid is electrolysed

The solution in the electrolysis of dilute sulphuric acid will contain, H + and SO 4 2 - ions from sulphuric acid and H + and OH - ions from water. The H + ions migrate towards the cathode and the following reaction takes place at the cathode; 2 H + ( aq ) + 2 e - → H 2 ( g ) Hydrogen gas is evolved at the cathode. Both SO 4 2 - and OH - ions migrate towards anode. HO - ions discharged at the anode as it is lower than SO 4 2 - in the electrochemical series. The following reaction takes place at the anode; 4 OH - → 2 H 2 O + O 2 + 4 e - Oxygen gas is evolved at the anode.

HARD

Earn 100

Explain the Bosch process.

Important Questions on Hydrogen

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Write precautions to take while preparing hydrogen in a laboratory.

HARD

Science>Chemistry>Hydrogen>Preparation of hydrogen

Identity the salts $P$ and $Q$ from the observations given below:

When dilute $H C l$ is added to a salt $Q$ , a brisk effervescence is produced and the gas turns lime water milky. When $N H_{4} O H$ solution is added to the above mixture (after adding dilute $H C l$ ), it produces a white precipitate which is soluble in excess $N H_{4} O H$ solution.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Preparation of hydrogen with hot water is a fast reaction.

EASY

Science>Chemistry>Hydrogen>Preparation of hydrogen

Zinc metal shows amphoteric nature, it is due to which one of the following facts:

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Which of the following is not the industrial method of preparation of hydrogen?

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Write the equations for the following reaction.
Zinc with hydrochloric acid.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Demonstrate the laboratory preparation of hydrogen gas. Draw a well labelled diagram, also write equations of reaction. Discuss the preference of zinc granules to other metals for the process.

HARD

Science>Chemistry>Hydrogen>Preparation of hydrogen

Name the gas produced when aluminium foil reacts with dilute hydrochloric acid.

HARD

Science>Chemistry>Hydrogen>Preparation of hydrogen

The following ionic equations represent changes that occur during electrolysis:

2 C l^{-} \to C l_{2} + 2 e^{-}

C u^{2 +} + 2 e^{-} \to C u

C u \to C u^{2 +} + 2 e^{-}

2 H^{+} + 2 e^{-} \to H_{2}

4 H O^{-} \to 2 H_{2} O + O_{2} + 4 e^{-}

Write two equations that show the processes that occur when diluting sulphuric acid is electrolysed

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

What happens when hydrochloric acid is poured on a copper plate? Which gas is produced? How do you test it?

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Give reason for the following:
In laboratory preparation of hydrogen gas, the gas is collected by the downward displacement of water.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

What happens when zinc reacts with dilute hydrochloric acid.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Complete the following reaction:

$Zn + H_{2} {SO}_{4} \to$

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

In the laboratory, hydrogen gas is prepared by the reaction of _____ with hydrochloric acid.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

What happens when dilute sulphuric acid is added to zinc?

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Give the reason for the electrolysis of acidulated water is considered to be an example of catalysis.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Rahul took some zinc granules in a test tube and added dilute

HCl

to it. He observed that the colour of zinc granules changed to.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

What happens when dilute sulphuric acid is poured on a copper plate? Write word equations of the reactions involved.

MEDIUM

Science>Chemistry>Hydrogen>Preparation of hydrogen

Complete the following reaction:

$Zn + 2 HCl \to$

HARD

Science>Chemistry>Hydrogen>Preparation of hydrogen

Why should we use zinc granules in Bosch process? Why should we not use nitric acid (even in its dilute form) during this process?

Note: This question given in the book seems to have error and the modified question should be as given below.

Why should we use zinc granules in laboratory process for the preparation of hydrogen gas? Why should we not use nitric acid (even in its dilute form) during this process?

Explain the Bosch process.

Important Questions on Hydrogen

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