Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

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Assertion :Limestone added in the blast furnace decomposes to give CaO which forms slag in the molten state and separates out from iron. Reason: The iron obtained from the blast furnace contains about 4% carbon and many impurities like S, P, Si, Mn, etc.

Assertion :Limestone added in the blast furnace decomposes to give $C a O$ which forms slag in the molten state and separates out from iron. Reason: The iron obtained from the blast furnace contains about 4% carbon and many impurities like $S, P, S i, M n,$ etc.