100) Which of the following is used as a scavenger in metallurgy?

Answer is:

Ca

Explanation:

Ca is used as a scavenger of oxygen and nitrogen in metallurgical operations.

Inorganic Chemistry MCQ with Answers

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101) The metal that forms a self protecting film of oxide to prevent corrosion is:

Answer is:

Al

102) Carbon can not be used in the extraction of Al₂O₃ because:

Pure carbon is not easily available

The enthalpy of formation of CO₂ is more than that of Al₂O₃

It is an expensive proposition

The enthalpy of formation of Al₂O₃ is very high

Answer is:

The enthalpy of formation of Al₂O₃ is very high

Explanation:

Enthalpy of formation being high, it can not be reduced by carbon.

103) Which of the following statements is incorrect about B₂H₆?

It has two 2e−3c bonds

It is an electrom deficient molecule

All the B−H bond lengths are equal

It has four 2e−2c bonds

Answer is:

All the B−H bond lengths are equal

104) Which of the following statements is correct?

N₂ does not react with metallic lithium at room temperature to form Li₃N

Hydrolysis of Mg₃N₂ gives NH₃

NH₃ is a stronger Lewis base than PH₃

Maximum covalency of nitrogen is 3

Answer is:

Hydrolysis of Mg₃N₂ gives NH₃

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100) Which of the following is used as a scavenger in metallurgy?

Ca

Inorganic Chemistry MCQ with Answers

Related Inorganic Chemistry MCQ with Answers

101) The metal that forms a self protecting film of oxide to prevent corrosion is:

Al

102) Carbon can not be used in the extraction of Al2O3 because:

The enthalpy of formation of Al2O3 is very high

103) Which of the following statements is incorrect about B2H6?

All the B−H bond lengths are equal

104) Which of the following statements is correct?

Hydrolysis of Mg3N2 gives NH3

Inorganic Chemistry MCQ with Answers

102) Carbon can not be used in the extraction of Al₂O₃ because:

The enthalpy of formation of Al₂O₃ is very high

103) Which of the following statements is incorrect about B₂H₆?

Hydrolysis of Mg₃N₂ gives NH₃