Hydrogen : Chemistry MCQ Practice Questions & Answers (Tamil)

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1.

You can use a hydrogen fuel cell to power

A

Cars/Busses

B

Fork-lifts

C

Cell phones

D

All of the above

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2.

Why does H+ ion always get associated with other atoms or molecules?

A

Ionisation enthalpy of hydrogen resembles that of alkali metals.

B

Its reactivity is similar to halogens.

C

It resembles both alkali metals and halogens.

D

Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to smal size it cannot exist free.

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3.

Which one is ionic hydride in nature?

A

CrH

B

$NH_3$

C

$H_2O$

D

NaH

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4.

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

A

Ca2+

B

Na+

C

Cl-

D

K+

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5.

Which of the following hydrides is electron-precise hydride?

A

$B_2H_6$

B

$NH_3$

C

$H_2O$

D

$CH_4$

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6.

Which of the following compounds is used for water softening?

A

Ca3 ( $PO_4$ )2

B

$Na_3PO_4$

C

$Na_6P_6O_{18}$

D

$Na_2HPO_4$

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7.

Which group forms hydride?

A

6

B

7

C

8

D

9

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8.

When sodium peroxide is treated with dilute sulphuric acid, we get

A

sodium sulphate and water

B

sodium sulphate and oxygen

C

sodium sulphate, hydrogen and oxygen

D

sodium sulphate and hydrogen peroxide

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9.

When $MnO_4$ reacts with $H_2O_2$ in basic medium then following species are involved, except

A

$MnO_2$

B

$O_2$

C

OH-

D

$Mn^{2+}$

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10.

What is the strength of 20 volume solution of $H_2O_2$ ?

A

5g/L

B

10g/L

C

30g/L

D

60g/L

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11.

What is the only by-product of hydrogen fuel-cells?

A

Carbon Dioxide ( $CO_2$ , which is a greenhouse gas)

B

Nothing

C

Water vapor

D

Helium

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12.

What is the most common element in the world?

A

Hydrogen

B

Oxygen

C

Helium

D

Carbon

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13.

What can you produce hydrogen from?

A

Water

B

Plants

C

Natural gasl

D

All of the above and more

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14.

True/False: hydrogen fuel cell vehicles are electric vehicles

A

False Statement

B

True Statement

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15.

True or false: hydrogen is an energy source.

A

True Statement

B

False Statement

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16.

The oxide that gives $H_2O_2$ on treatment with dilute $H_2SO_2$ is

A

$PbO_2$

B

$BaO_2 \cdot 8H_2O + O_2$

C

$MnO_2$

D

$TiO_2$

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17.

The number of $H_2O$ molecules which are involve in Hydrozen bonding in $CuSO_4 \cdot 5H_2O$ molecule itself is

A

$H_3PO_2$

B

$H_3PO_3$

C

$H_3PO_4$

D

$PH_3$

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18.

The electronic conguration of D (Isotope of Hydrogen)

A

1s2

B

1s22s11

C

1s1

D

1s22s22p1

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19.

Syn-gas is a mixture of

A

CO+ $N_2$

B

$O_3$

C

CO + $H_2$

D

CO + $H_2CO_3$

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20.

Select the incorrect statement for $H_2O_2$ structure

A

It is non planar

B

O–O bond length is more in gaseous state than in solid phase

C

Both OH bond are in different plane

D

O–O–H bond angle in gas phase is more than in solid phase

Hydrogen in Chemistry : Practice MCQ Questions & Answers with Explanations

Hydrogen in Chemistry : Practice MCQ Questions & Answers with Explanations