Chemistry in Everyday Life — Chemistry STD 12 — Question

The formula of rust is ………..

Consider the following statements.
(i) The melting point decreases from Scandium to Vanadium in 3d series.
(ii) In 3d transition series, atomic radius decreases from Sc to V and upto copper atomic radius nearly remains the same.
(iii) As we move down in 3d transition series, atomic radius increases.
Which of the above statements is/are incorrect?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Which of the following d-block element has half-filled penultimate d sub shell as well as half-filled valence sub shell?

The method by which aniline cannot be prepared is ____________.

Which one of the following reaction is used to identify primary amines?

………… is a good reducing agent.

Compounds used in Holme’s signal are …………