EASY
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Ortho & para hydrogen differ in:

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Important Questions on Hydrogen

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which of the following statements is not true for hydrogen:
1) It exists as a diatomic molecule.
2) It has one electron in the outermost shell.
3) It can lose an electron to form a cation which can freely exist.
4) It cannot form ionic compounds.
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The radius R of a nucleus of mass number A can be estimated by the formula R=1.3×10-15A1/3m. It follows that the mass density of a nucleus is of the order of: Mprot≅Mneut ≃1.67×10-27 kg
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Which of the following statements about hydrogen is incorrect?

MEDIUM
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.

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EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which one of the following statements is incorrect ?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The isotopes of hydrogen are:
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Write the four uses of dihydrogen gas.
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which of the following properties of hydrogen is similar to halogen family?
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen

Out of the oxides given below which of them cannot be reduced by H2?

I-Al2O3; II-CuO; III-ZnO

EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
At 298.2 K the relationship between enthalpy of bond dissociation (in kJ mol-1) for hydrogen EH and its isotope, deuterium ED, is best described by:
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which physical property of di-hydrogen is wrong?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The gas used in the manufacture of vegetable oils is 
 
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Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The first ionization potential of Na, Mg, Al and Si are in the order :
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Hydrogen can be liquefied under high pressure and by cooling it below _____.
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which of the following is not a property of hydrogen?
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The period that contains only gaseous elements is
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
The colour of hydrogen is,
EASY
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Moist hydrogen cannot be dried over concentrated H2SO4 because it:
MEDIUM
Chemistry>Inorganic Chemistry>Hydrogen>Properties of Dihydrogen
Which of the following cannot be reduced by hydrogen?