Moist hydrogen peroxide can not be dried over conc. H₂SO₄ because

• it can catch fire

• it is reduced by H₂SO₄

• it is oxidised by H₂SO₄

• it is decomposed by H₂SO₄

Glauber's salt is

• Na₂SO₄.10H₂O

• Na₂S₂O₃.5H₂O

• CuSO₄.5H₂O

• Na₂B₄O₇.10H₂O

Hydrogen molecule differs from chlorine molecule in the following respect.

• Hydrogen molecule is non-polar but chlorine molecule is polar

• Hydrogen molecule is polar while chlorine molecule is non-polar

• Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not

• Hydrogen molecule cannot participate in coordinate bond formation but chlorine molecule can

Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

• Mn²⁺

• I₂

• PbS

• Fe²⁺

CaC₂ and H₂O react to produce

• CH₄

• C₂H₄

• C₂H₂

• C₂H₆

Which of the following is not correct regarding the elecolytic preparation of H₂O₂?

• Lead is used as cathode

• 50% H₂SO₄ is used

• Hydrogen is liberated at anode

• Sulphuric acid undergoes oxidation

What are the values of n₁ and n₂ respectively for ${\mathrm{H}}_{\mathrm{\beta }}$ line in the Lyman series of hydrogen atomic spectrum 44 ?

• 3 and 5

• 2 and 3

• 1 and 3

• 2 and 4

The most probable velocity (in cm/s) of hydrogen molecule at 27$°$C will be

• 19.3 x 10⁴

• 17.8 x 10⁴

• 24.93 x 10⁹

• 17.8 x 10⁸

Heavy water is

• CaSO₄

• water contain CaSO₄, MgSO₄

• D₂O

• water contain CaCO₃

260.

The number of moles of oxygen obtained by the electrolytic decomposition of 108 g water is

• 2.5

• 3

• 5

• 7.5