Important Questions From Hydrogen For NEET | Hydrogen MCQs

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Questions
1 Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of
A Chlorides of Ca and Mg in water
B Sulphates of Ca and Mg in water
C Hydrogen carbonates of Ca and Mg in water
D Carbonates of alkali metals in water

Answer:A, B
2 Which of the following statements is correct?
A Elements of group 15 form electron deficient hydrides.
B All elements of group 14 form electron precise hydrides.
C Electron precise hydrides have tetrahedral geometries.
D Electron rich hydrides can act as Lewis acids.

Answer:B, C
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3 Which of the following statements is correct?
A Hydrides of group 13 act as Lewis acids.
B Hydrides of group 14 are electron deficient hydrides.
C Hydrides of group 14 act as Lewis acids.
D Hydrides of group 15 act as Lewis bases.

Answer:A, D
4 Which of the following statements is correct?
A Metallic hydrides are deficient of hydrogen.
B Metallic hydrides conduct heat and electricity.
C Ionic hydrides do not conduct electricity in solid state.
D Ionic hydrides are very good conductors of electricity in solid state.

Answer:A, B, C
5 Assertion (A) : Permanent hardness of water is removed by treatment with washing soda.

Reason (R) : Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

A Statements A and R both are correct and R is the correct explanation of A.
B A is correct but R is not correct.
C A and R both are correct but R is not the correct explanation of A.
D A and R both are false.

Answer:Statements A and R both are correct and R is the correct explanation of A.
6 Assertion (A) : Some metals like platinum and palladium, can be used as storage media for hydrogen.

Reason (R) : Platinum and palladium can absorb large volumes of hydrogen.

A Statements A and R both are correct and R is the correct explanation of A.
B A is correct but R is not correct.
C A and R both are correct but R is not the correct explanation of A.
D A and R both are false.

Answer:Statements A and R both are correct and R is the correct explanation of A.
7 Dihydrogen can be prepared on a commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of CO and H2 gas is formed. It is known as ____________.
A Water-gas
B Syngas
C Producer gas
D Industrial gas

Answer:A, B
8 Which of the following statement(s) is/are correct in the case of heavy water?
A Heavy water is used as a moderator in a nuclear reactor.
B Heavy water is more effective as a solvent than ordinary water.
C Heavy water is more associated than ordinary water.
D Heavy water has a lower boiling point than ordinary water.

Answer:A, C
9 Which of the following statements about hydrogen are correct?
A Hydrogen has three isotopes of which protium is the most common.
B Hydrogen never acts as a cation in ionic salts.
C The hydrogen ion, H+, exists freely in solution.
D Dihydrogen does not act as a reducing agent.

Answer:A, B
10 Some of the properties of water are described below. Which of them is/are not correct?
A Water is known to be a universal solvent.
B Hydrogen bonding is present to a large extent in liquid water.
C There is no hydrogen bonding in the frozen state of water.
D Frozen water is heavier than liquid water.

Answer:C, D
11 The hardness of water may be temporary or permanent. Permanent hardness is due to the presence of
A Chlorides of Ca and Mg in water
B Sulphates of Ca and Mg in water
C Hydrogen carbonates of Ca and Mg in water
D Carbonates of alkali metals in water

Answer:A, B
12 Which of the following statements is correct?
A Elements of group 15 form electron deficient hydrides.
B All elements of group 14 form electron precise hydrides.
C Electron precise hydrides have tetrahedral geometries.
D Electron rich hydrides can act as Lewis acids.

Answer:B, C
13 Which of the following statements is correct?
A Hydrides of group 13 act as Lewis acids.
B Hydrides of group 14 are electron deficient hydrides.
C Hydrides of group 14 act as Lewis acids.
D Hydrides of group 15 act as Lewis bases.

Answer:A, D
14 Which of the following statements is correct?
A Metallic hydrides are deficient of hydrogen.
B Metallic hydrides conduct heat and electricity.
C Ionic hydrides do not conduct electricity in solid-state.
D Ionic hydrides are very good conductors of electricity in solid-state.

Answer:A, B, C
15 _____ is added as Stabilizer in H202.
A Dust
B Urea
C Zn Powder
D Carbamate

Answer:Urea
16 H2O2 as an antiseptic is sold in the market as:
A Per-carbonate
B Cephalosporin
C Perhydrol
D Sodium perborate

Answer:Perhydrol
17 Arrange in order of increasing Electrical conductance:
A BeH2 > TiH2 > CaH2
B LPG > CH4 > Octane > H2(g)
C CaH > TiH2 > BeH2
D TiH2 > CaH2 > BeH2

Answer: TiH2 > CaH2 > BeH2
18 Arrange the following as per the order of energy released per gram:
A H2 (g) > CH4 > LPG > Octane
B LPG > CH4 > Octane > H2 (g)
C LPG > H2 (g) > CH4 > Octane
D H2 (g) > LPG > CH4 > Octane

Answer:H2 (g) > CH4 > LPG > Octane
19 The basic Principle of hydrogen economy is:
A Transportation of gas in liquid form
B Storage in liquid form
C Transport in liquid form
D All of these

Answer:All of these
20 On Mass basis Dihydrogen can release about how much times more energy than petrol?
A 4 times
B 10 times
C 3 times
D 30 times

Answer:3 times

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