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Daily Practice Problems
Class 11 Chemistry
Hydrogen
daily practice problem

Question1.

Which of the following hydrides is electron-deficient hydride?

(i) B2H6

(ii) NH3

(iii) H2O

(iv) CH4

Question2.

How will you prepare H2O2 from BaO2?

Question3.

Which of the following ions will cause hardness in water sample?

(i) Mg2+

(ii) Na+

(iii) Ca2+

(iv) K+

Question4.

Which among the following is only element of group 6 which forms hydride?

1) Mo

2) Cr

3) W

4) Sg

Question5.

Reaction of steam on methane at 1270K in presence of nickel catalyst, yields a mixture of CO and H2 gas which is known as ____________.

(i) Water gas

(ii) Syngas

(iii) Producer gas

(d) Industrial gas

Question6.

Give 2 reactions showing that heavy water is used for the preparation of other deuterium compounds.

Question7.

State any two uses of H2O2.

Question8.

Write the reaction between water and fluorine. Justify whether it is a redox reaction.

Question9.

How temporary hardness of water can be removed by Clark’s method?

Question10.

Give one reaction each showing oxidising and reducing action of H2O2 in acidic & basic mediums.

Question11.

Complete the following reactions:

LiH + Al2Cl6

LiH + B2H6

Question12.

How Dihydrogen can be prepared from Zn in Laboratory?

Question13.

How is methanol prepared from Dihydrogen? Give chemical reaction.

Question14.

Why hard water does not lather with soap?

Question15.

Statues coated with white lead on long exposure to atmosphere turns black and the original colour can be restored on treatment with H2O2. Explain.

Question16.

Which isotope of Hydrogen contain equal number of proton & neutron?

1) Protium

2) Tritium

3) Hydronium

4) Deuterium

Question17.

Name two complex metal hydrides which are used as reducing agents in organic reactions.

Question18.

Give four industrial uses of Dihydrogen.

Question19.

Calculate the strength of 15 volume H2O2 solution.

Question20.

What is molecular mass of heavy water? Give one reaction for the preparation of deuterium from heavy water.

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