NEET Practice Questions - Chemistry - Classification of Elements and Periodicity

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  • Subject:

    Chemistry

  • Chapter:

    Classification of Elements and Periodicity


the tenth element in the periodic table resembles:

(1)the second

(2)the fourth

(3)the fifth

(4)the eight


Which of the following order is not in accordance with the property stated against it ?

                                                                                                           

(a) F2 > Cl> Br2 > l2 Oxidising Power

(b) Hl > HBr >HCl >HF Acidic property in water

(c) F2 > Cl> Br2 > lElectronegativity

(d) F2 > Cl> Br2 > l2 Bond dissociation energy


An element X occurs in short period having configuration ns2np1 . The formula and nature of its oxide are:

(a) XO3, basic

(b) XO3, acidic

(c) X2O3, amphoteric

(d) X2O3, basic


The outermost electronic configuration of the most electronegative element is :

(a) ns2np3

(b) ns2np4

(c) ns2np5

(d) ns2np6


The elements X, Y, Z and J have the indicated electron configurations starting with the innermost shell. The most metallic element is :

(a) X = 2, 8, 3

(b) Y = 2, 8, 8

(c) Z = 2, 8, 8, 1

(d) j = 2, 8, 8, 7


Which statement is true?

(1) the electronegative nature of elements increases along the period

(2) the electropositive nature of elements increases along the period

(3) the chemical reactivity of elements increases along the period

(4) the chemical reactivity of element decreases along the period


The most non-metallic element among the following is:

(a) Be

(b) B

(c) Mg

(d) Al


58Ce is a member of:

(a) s-block elements

(b) p-block elements

(c) d-block elements

(d) f-block elements


The screening effect of 'd' electrons is :

(a) much less than s-electrons

(b) much more than s-electrons

(c) equal to s-electrons

(d) equal to p-electrons


Transuranic elements are those which are:

(a) of higher atomic number than uranium

(b) lighter than uranium

(c) of lower atomic number than uranium

(d) of same atomic number as uranium