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Question Bank No: 2

1. Elements belonging to the same group have the same

a)		atomic size
b)		atomic mass
c)		Covalent radii
d)		Valence electrons

2. The correct order of ionization energy is given by

a)		B<N<C<O
b)		B<C<N<O
c)		B= C<O<N
d)		B<C<O<N

3. The strongest base among the following is

a)		LiOH
b)		NaOH
c)		KOH
d)		CsOH

4. The sizes of $A$ , $A^{+}$ , $A^{2 +}$ and $A^{-}$ decrease in the order

a)		$A^{2 +} > A^{+} > A > A^{-}$
b)		$A^{+} > A^{2 +} > A^{-} > A$
c)		$A^{-} > A^{+} > A > A^{2 +}$
d)		$A^{-} > A > A^{+} > A^{2 +}$

5. The element with very high ionization potential but zero electron affinity is

a)		H
b)		He
c)		Na
d)		Be

6. The correct order of atomic size of C, N, P and S follows the order

a)		N<C<P<S
b)		C<N<P<S
c)		N<C<S<P
d)		C<N<S<P

7. The successive ionization energies of a metal M are 100.5 and 1124.5 k Cal respectively. The possible formula of its chloride will be

a)		${MCl}_{4}$
b)		${MCl}_{3}$
c)		${MCl}_{2}$
d)		$MCl$

8. The first electron affinity of halogens vary in the order

a)		F>Cl>Br>I
b)		Cl>Br>F>I
c)		I>Br>Cl>F
d)		Cl>F>Br>I

9. An atom which atomic number 29 belongs to

a)		3rd period and 4th group
b)		4th group and 2nd period
c)		4th period and 11th group
d)		11th group and 3rd period

10. The two places left empty by Mendeleev in the periodic table were later filled by the elements

a)		Al and Si
b)		Ar and Sb
c)		Sb and Bi
d)		Ga and Ge

11. The Scientist responsible for the addition of zero group to Mendeleev's original periodic table was

a)		Planck
b)		Bohv
c)		Rutherford
d)		Ramsay

12. Among the following which one will have highest electron affinity?

a)		$1 s^{1}$
b)		$1 s^{2} {2 s}^{1}$
c)		$1 s^{2} 2 s^{2} 2 p^{4}$
d)		$1 s^{2} 2 s^{2} 2 p^{5}$

13. Which of the following is associated with biggest jump between 2nd and 3rd IE?

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

14. Which of the following requires radiation of highest frequency to cause emission of electron?

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

15. Which of the following decreases in going down the halogen group?

a)		Ionic Radiaus
b)		Atomic radius
c)		IE
d)		Boiling point

16. The oxide of which of the following will be acidic

a)		Mg
b)		Rb
c)		Li
d)		Cl

17. The valancy of noble gases, in general is

a)		0
b)		1
c)		3
d)		2

18. The element with Z=26 will be found in group

a)		2
b)		8
c)		6
d)		10

19. Which of the following is not isoelectronic with $O^{2 -}$

a)		$N^{3 -}$
b)		${Na}^{+}$
c)		$F^{-}$
d)		${Ti}^{+}$

20. Alkali metal in each period have

a)		smallest size
b)		lowest IE
c)		highest IE
d)		highest electro negtivity

21. The ionic radius of $N^{3 -}, O^{2 -}, F^{-}, {Na}^{+}$ follows the order

a)		$N^{3 -} > O^{2 -} > F^{-} > {Na}^{+}$
b)		$N^{3 -} > {Na}^{+} > O^{2 -} > F^{-}$
c)		${Na}^{+} > O^{2 -} > N^{3 -} > F^{-}$
d)		${Na}^{+} > F^{-} > O^{2 -} > N^{3 -}$

22. The correct sequence of elements in the decreasing order of first IE is

a)		Na>Mg>Al>Si
b)		Mg>Na>Al>Si
c)		Al>Mg>Na>Si
d)		Si>Mg>Al>Na

23. Which of the following has the maximum electron affinity?

a)		F
b)		S
c)		I
d)		Cl

24. In the modern periodic table, elements are arranged in the increasing order of

a)		Atomic mass
b)		Atomic number
c)		Mass number
d)		Isotopic number

25. Which is true about the electronegativity order of the following?

a)		P $>$ S
b)		C >N
c)		Br >Cl
d)		Sr >Ca

26. Which of the following molecules does not have a dipole moment?

a)		${ClO}_{2}$
b)		${CO}_{2}$
c)		${NO}_{2}$
d)		${SO}_{2}$

27. Methanol and Ethanol are miscible in water due to

a)		Co-valent character
b)		Hydrogen bonding character
c)		Oxygen bonding character
d)		None of the above

28. A ${sp}^{3}$ hybrid orbital contains

a)		$\frac{1}{4} s$ character
b)		$\frac{1}{2} s$ character
c)		$\frac{3}{2} s$ character
d)		$\frac{2}{3} s$ character

29. The H-O-H angle in water molecules is

a)		$90^{0}$
b)		$180^{0}$
c)		$105^{0}$
d)		$75^{0}$

30. The pyramidal geometry is associated with

a)		${CH}_{4}$
b)		${NH}_{3}$
c)		$H_{2} O$
d)		${CO}_{2}$

31. The correct order of decreasing polarisability of ions is

a)		${Cl}^{-,} {Br}^{-}, I^{-}, F^{-}$
b)		$F^{-}, I^{-}, {Br}^{-}, {Cl}^{-}$
c)		$F^{-}, {Cl}^{-}, {Br}^{-}, I^{-}$
d)		$I^{-}, {Br}^{-}, {Cl}^{-}, F^{-}$

32. In a homonuclear molecule which of the following set of orbitals are degenerate?

a)		$σ_{2 s}, σ_{1 s}$
b)		$π_{2 px}, π_{2 py}$
c)		$π_{2 px}, σ_{2 pz}$
d)		$σ_{2 pz}$ , ${σ^{*}}_{2 px}$

33. The hybrid states of carbon in diamond, graphite, and acetylene are respectibvely.

a)		${sp}^{2}, sp, {sp}^{3}$
b)		$sp, {sp}^{2}, {sp}^{3}$
c)		${sp}^{3}, {sp}^{2}, sp$
d)		${sp}^{2}, {sp}^{3}, sp$

34. The lustre of the metal is on account of

a)		high density of metals
b)		high polish of metals
c)		reflection of light due to the presence of free electrons
d)		chemical inertness of metals

35. Which of the following compounds has $μ = 0 ?$

a)		${CCl}_{4}$
b)		${CHCl}_{3}$
c)		HF
d)		${NH}_{3}$

36. Which of the following is electron deficient?

a)		${BCl}_{3}$
b)		${PCl}_{3}$
c)		${PCl}_{5}$
d)		${NH}_{3}$

37. ${NH}_{3}$ and ${BF}_{3}$ form adduct readily because they form

a)		Ionic bond
b)		Covalent bond
c)		Co-ordinate bond
d)		Hydrogen bond

38. In which of the following species is the underlined carbon having ${sp}^{3}$ hybridisation

a)		${CH}_{3} -$ COOH
b)		${CH}_{3} -$ C $H_{2} - OH$
c)		${CH}_{3} -$ C $O - {CH}_{3}$
d)		${CH}_{2} =$ C $H - {CH}_{3}$