Which of the following statements regarding -block elements are true?

CHEMISTRY · Multi correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements

Problem

Which of the following statements regarding dd-block elements are true? (1) The colour of anhydrous CuSO4\text{CuSO}_4 is blue. (2) Spitting of silver can be prevented by covering the surface of molten silver with charcoal. (3) Iodine liberated in a reaction can be estimated by titration against a standard thiosulphate solution. (4) Lanthanum is the first element of the third transition series.

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