For decolorisation of 1 mole of acidified KMnO₄, the moles of H₂O₂ required is ___________

(a)

\(\frac{1}{2}\)

(b)

\(\frac{3}{2}\)

(c)

\(\frac{5}{2}\)

(d)

\(\frac{7}{2}\)

The hybridisation of oxygen atom is H₂O and H₂O₂ are, respectively __________

(a)

sp and Sp³

(b)

sp and sp

(c)

Sp and Sp²

(d)

Sp³and Sp³

In solid ice, oxygen atom is surrounded _____________

(a)

tetrahedrally by 4 hydrogen atoms

(b)

octahedrally by 2 oxygen and 4 hydrogen atoms

(c)

tetrahedrally by 2 hydrogen and 2 oxygen atoms

(d)

octahedrally by 6 hydrogen atoms

Heavy water is used as _________

(a)

moderator in nuclear reactions

(b)

coolant in nuclear reactions

(c)

both (a) and (b)

(d)

none of these

Assertion: Permanent hardness of water is removed by treatment with washing soda.
Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates

(a)

Both assertion and reason are true and reason is the correct explanation of assertion.

(b)

Both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

Assertion is true but reason is false

(d)

Both assertion and reason are false