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CBSE

Chemistry

NEET Chemistry : Classification of Elements and Periodicity in Properties

31.

The element which forms oxides in all oxidation states + 1 to + 5 is

32.

In long form of Periodic Table, the properties of the elements are a periodic function of their

33.

Which one of the following transition metal ions is diamagnetic?

34.

Which of the following configurations corresponds to element of highest ionisation energy?

35.

The metal that produces red-violet colour in the non-luminous flame is

36.

Which of the following is a wrong statement ? In a given period of the Periodic Table, the s-block element has, in general, a higher value of

37.

Argon is used

38.

Consider the following reaction,

C₆H₅NO₂ $\overset{Sn / HCl}{\to}$ X $\overset{C_{6} H_{5} COCl}{\to}$ Y + HCl

What is Y?

39.

The correct order of decreasing first ionisation energy is

40.

The most basic element is

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