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Enthalpy of fusion of hydrogen is $2.18 kJ {mol}^{- 1} .$

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Important Questions on Hydrogen

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

The isotopes of hydrogen are:

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

The most abundant elements by mass in the body of a healthy human adult are:

Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75kg person would gain if all

^{1} H

atoms are replaced by

^{2} H

atoms is:

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Dihydrogen of high purity

(> 99.95 %)

is obtained through :

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Write a chemical equation for the reaction taking place in the flask. Write name and one property of the gas evolved.

Question Image

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Write the four uses of dihydrogen gas.

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Out of the oxides given below which of them cannot be reduced by $H_{2}$ ?

$I - {Al}_{2} O_{3}; II - CuO; III - ZnO$

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which of the following acts as oxidising agent in hydrogen- oxygen fuel cell?

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

298.2 K

the relationship between enthalpy of bond dissociation (in

kJ {mol}^{- 1}

) for hydrogen

(E_{H})

and its isotope, deuterium

(E_{D})

, is best described by:

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which one of the following statements is incorrect ?

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

The radius

R

of a nucleus of mass number

A

can be estimated by the formula

R = (1.3 \times 10^{- 15}) A^{1 / 3} m

. It follows that the mass density of a nucleus is of the order of:

(M_{p r o t} ≅ M_{neut} ≃ 1.67 \times 10^{- 27} kg)

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which of the following properties of hydrogen is similar to halogen family?

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which physical property of di-hydrogen is wrong?

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

The bond length in

H_{2}

molecule is

0.74 Å

. The covalent radius of hydrogen is :

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Hydrogen can be liquefied under high pressure and by cooling it below _____.

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Covalent radius of hydrogen is measured using the _____ of

H_{2}

molecule.

HARD

Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Covalent radius of hydrogen is measured in _____ .

HARD

Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

If the bond dissociation energies of

XY, X_{2}

and

Y_{2}

(all diatomic molecules) are in the ratio of

1 : 1 : 0.5

and

Δ H_{f}

for the formation of

XY

- 200 kJ {mol}^{- 1}

. The bond dissociation energy of

X_{2}

will be

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which of the following is not a property of hydrogen?

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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Give reasons why hydrogen is not collected in air but is collected over water.

Enthalpy of fusion of hydrogen is 2.18 kJ mol-1.

Important Questions on Hydrogen

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Enthalpy of fusion of hydrogen is $2.18 kJ {mol}^{- 1} .$