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Question Bank No: 1

1. The increasing order of the first ionization enthalpies of the elements B,P,S and F(lowest first) is

a)		F $< S < P < B$
b)		P $< S < B < F$
c)		B $< P < S < F$
d)		B $< S < P < F$

2. Amongst the following elements (whose electronic configurations are given below), the one having the highest ionization enthalphy is

a)		[Ar]4 $s^{1}$
b)		[Ar]4 $s^{2}$
c)		[Ar]3 $d^{5} 4 s^{1}$
d)		[Ar]3 $d^{10} 4 s^{2}$

3. The first ionization energies in eV/atom of magnesium and aluminium are respectively given by

a)		7.64, 5.98
b)		7.64,7.64
c)		5.98, 7.64
d)		5.98, 5.98

4. The outermost electronic configuration of the most electronegative element is

a)		n $s^{2} n p^{3}$
b)		n $s^{2} n p^{4}$
c)		n $s^{2} n p^{5}$
d)		n $s^{2} n p^{6}$

5. Which of the order for ionization enthalphy is correct?

a)		Be $> B > C > N > O$
b)		B $< Be < C < O < N$
c)		B $< Be < C < N < O$
d)		B $< Be < N < C < O$

6. Gradual addition of electronic shells in the noble gases causes a decrease in their

a)		Ionization enthalpy
b)		Atomic radius
c)		Boiling point
d)		Density

7. The elctronic configuration of the element is 1 $s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3} .$ What is the atomic number of the element which is just below the above element in the periodic table?

a)		33
b)		34
c)		31
d)		49

8. Which of the following pairs has both memebers from the same period of the periodic table?

a)		Na-Ca
b)		Na-Cl
c)		Ca-Cl
d)		Ca-Br

9. If the valence shell electronic structure for an element is ns2 np4, the element will belong to the group of

a)		Alkali metals
b)		Halogens
c)		Noble gases
d)		Chalcogens

10. The lowest first ionization enthalphy would be associated with which of the following structures?

a)		1 $s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
b)		1 $s^{2} 2 s^{2} 2 p^{5}$
c)		1 $s^{2} 2 s^{2} 2 p^{6}$
d)		1 $s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$

11. Which of the following sets of elements does not belong to same group?

a)		C,Si,Ga,Sn
b)		Cl,Br,I,At
c)		N,P,As,Sb
d)		He,Ne,Ar,Kr

12. Which of the following elements has the highest third ionization enthalpy?

a)		Sodium
b)		Magnesium
c)		Aluminium
d)		Silicon

13. Which of the following is a typical element?

a)		Li
b)		Na
c)		F
d)		N

14. An element with atomic number 20 is placed in which period of the periodic table?

a)		4
b)		3
c)		2
d)		1

15. Elements in the same vertical group of the periodic table have same

a)		Number of electrons
b)		atomic number
c)		number of valence electrons
d)		electronic configuration

16. As we go from left to right in period 3, the gram atomic volume of the elements

a)		Increases regularly
b)		decreases regularly
c)		first decreases and then increases
d)		remains almost constant

17. To which block, $106^{th}$ element belongs

a)		s-block
b)		p-block
c)		d-block
d)		f-block

18. Which of the following transition elements is synthetic?

a)		Mo
b)		Re
c)		Tc
d)		Ir

19. Which group contains elements that exists as monoatomic molecules ?

a)		1
b)		2
c)		14
d)		18

20. Which element was named Eka aluminium by Mendeleev?

a)		Gallium
b)		Scandium
c)		Germanium
d)		Indium

21. Law of octaves was proposed by

a)		Lothar Meyer
b)		D.I Mendeleev
c)		J.A.R Newlands
d)		J.W Dobereiner

22. Which of the following isoelectronics species would require least energy for the removal of electron?

a)		${Ca}^{2 +}$
b)		${Cl}^{-}$
c)		K
d)		Ar

23. Chloride of an element as gives neutral solution in water. In the periodic table A belongs to

a)		first group
b)		third group
c)		fifth group
d)		first transition series

24. Which of the following metas requires radiation of highes frequency to cause emission of electrons ?

a)		Na
b)		Mg
c)		K
d)		Ca

25. Atomic radii of fluorine and neon in Angstrom units are respectively given by

a)		0.72, 1.60
b)		1.60, 1.60
c)		0.72, 0.72
d)		2.72, 1.62

26. The correct order for the electronegativities of N, O, F and P is

a)		F > N > P > O
b)		F > O > P > N
c)		F > O > N > P
d)		N > O > F > P

27. Which of the order for ionization energy is correct?

a)		Be > B > C > N > O
b)		B < Be < C < O < N
c)		B < Be < C < N < O
d)		B < Be < N < C < O

28. Which has the highest second ionization potential

a)		nitrogen
b)		carbon
c)		oxygen
d)		fluorine

29. In each period, the most electropositive element belongs to group

a)		18
b)		17
c)		1
d)		2

30. Among the elements A, B, C and D having atomic numbers 7, 8, 9 and 12 respectively, the element with smallest size and highest IE is

a)		A
b)		B
c)		C
d)		D

31. The most electronegative element of the third period is

a)		F
b)		P
c)		Cl
d)		Na

32. In which block, $106^{th}$ element belongs

a)		s- block
b)		p- block
c)		d-block
d)		f-block

33. Diagonal relationship exists with

a)		Li and Mg
b)		Na and Mg
c)		K and Mg
d)		Al and Mg

34. Ni, Pt, Pd belongs to which group of the periodic table?

a)		12th
b)		14th
c)		8th
d)		10th

35. Consider the ions $K^{+}, S^{2 -}, C l^{-}$ and C $a^{2 +} .$ The radii of these ionic species follow the order.

a)		C $l^{-} > S^{2 -} > K^{+} > C a^{2 +}$
b)		$C a^{2 +} > C l^{-} > K^{+} > S^{2 -}$
c)		$K^{+} > S^{2 -} > C l^{-}$ $>$ C $a^{2 +}$
d)		$S^{2 -} > C l^{-}$ $> K^{+} >$ C $a^{2 +}$

36. EKa aluminium and EKa silicon are known as

a)		Gallium and Germanium
b)		Aluminum and Silicon
c)		Iron and Suphur
d)		Proton and Silicon

37. The increasing order of atomic radii of elements O, C, F, Cl, Br

a)		F,O, C, Cl, Br
b)		F, C, O, Cl, Br
c)		F, Cl, Br, O, C
d)		C, O, F, Cl, Br

38. The decreasing order of the second ionization potential of K, Ca and Ba is (at No: K = 19, Ca = 20, Ba =56)

a)		K $>$ Ca $>$ Ba
b)		Ca $>$ Ba $>$ K
c)		Ba $>$ K $>$ Ca
d)		K $>$ Ba $>$ Ca

39. The values of 1 $E_{1},$ 1 $E_{2},$ 1 $E_{3},$ 1 $E_{4}$ and 1 $E_{5}$ of an element are 7.1,14.3, 34.5, 46.8, 162.2 eV respectively. The element is likely to be

a)		Na
b)		F
c)		Ca
d)		Si

40. The ionization energy and election affinity of an element are 13 eV and 3.8 eV respectively. Its electronegativity on the pauling scale is

a)		4
b)		3.5
c)		3
d)		2.8

41. The electron affinity of halogens follows the order

a)		F $>$ Cl $>$ Br $>$ 1
b)		F $>$ Br $>$ Cl $>$ 1
c)		F $>$ Br $>$ 1 $>$ Cl
d)		Cl $>$ F $>$ Br $>$ 1

42. Which of the following structure is associated with the biggest jump between the second and third ionization energies ?

a)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{2}$
b)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{6}, {3 S}^{2}$
c)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{1}$
d)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{3}$

43. The ionization energy of nitrogen is more than that of oxygen because of

a)		greater attraction of the electrons by the nucleus
b)		Extra stability of half filled P - orbitals
c)		Smaller size of nitrogen atom
d)		more penetration effect

44. Which of the following element is expected to have highest electron affinity?

a)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{6}$ ,3 $S^{2}$ ,3 $P^{5}$
b)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{3}$
c)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{4}$
d)		1 $S^{2},$ 2 $S^{2}$ , 2 $P^{5}$

45. Alkali and alkaline earth metals belong to

a)		S- block elements
b)		P- block elements
c)		d- block elements
d)		f- block elements

46. Elements were classified into groups of three called triads , by

a)		Newlands
b)		Dobereiner
c)		Prout
d)		Lother Meyer

47. Which one of the following ions has the smaller radius?

a)		${el}^{-}$
b)		$S^{2 -}$
c)		$K^{+}$
d)		${Ca}^{2 +}$

48. In the periodic table metallic character shows which of the following trends

a)		decreases down a group and increases along a period
b)		increases down a group and increases along a period
c)		increases down a group and decreases along a period
d)		decreases down a group and doesnt change along a period

49. Which of the following has the largest atomic size

a)		${1 S}^{2}$ , ${2 S}^{2}$ , ${2 P}^{6}$ , ${3 S}^{2}$
b)		${1 S}^{2}$ , ${2 S}^{2}$ , ${2 P}^{6}$ , ${3 S}^{2}$ , ${3 P}^{1}$
c)		${1 S}^{2}$ , ${2 S}^{2}$ , ${2 P}^{6}$ , ${3 S}^{2}$ , ${3 P}^{3}$
d)		${1 S}^{2}$ , ${2 S}^{2}$ , ${2 P}^{6}$ , ${3 S}^{2}$ , ${3 P}^{5}$

50. In which of the following pairs, the second atom is larger than the first

a)		N, P
b)		Br, Cl
c)		Ba, Sr
d)		Mg, Al