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Question Bank No: 3

1. Which one of the following metal ions is coloured

a)		${Cu}^{+}$
b)		${Zn}^{2 +}$
c)		${Sc}^{3 +}$
d)		$V^{4 +}$

2. A non-copper alloy is

a)		Solder
b)		Brass
c)		Bronze
d)		Bell metal

3. Among the lanthanides the one obtained by synthetic method is

a)		Lu
b)		Pm
c)		Pr
d)		Gd

4. Concentration of silver ore is based on its solubility in

a)		conc. HN $O_{3}$
b)		aqua regia
c)		dil. KCN
d)		conc. KOH

5. Cupric hydroxide dissolves in aqueous ammonia due to

a)		reduction to cuprous hydroxide
b)		complex formation
c)		increase in pH
d)		the amphoteric nature of Cu(OH $)_{2}$

6. Which of the following has the least magnetic moment?

a)		${Cu}^{2 +}$
b)		${Ni}^{2 +}$
c)		${Co}^{2 +}$
d)		${Fe}^{2 +}$

7. Nessler's reagent is

a)		$K_{2} Hg$ $I_{4}$
b)		$K_{2} Hg$ $I_{4}$ +KOH
c)		$K_{2} Hg$ $I_{2}$ +KOH
d)		$K_{2} Hg$ $I_{4}$ +Hg

8. The noble gas was first time discovered by

a)		Cavendish
b)		William Ramsay
c)		Lockyer
d)		Frankland

9. The structure of Xe $F_{6}$ is

a)		distorted octahedral
b)		pyramidal
c)		tetrahedral
d)		none of the above

10. Which of the following statements is not true about noble gases?

a)		their ionization energies are very high
b)		their electron affinities are nearly zero
c)		they dont form any chemical compounds
d)		they are not easily liquefied

11. Noble gases do not react with other elements because

a)		they are monoatomic
b)		they are found in abundance
c)		the size of their atoms is very small
d)		they have completely paired up and stable electron shells

12. Which noble gas is most soluble in water ?

a)		He
b)		Ar
c)		Ne
d)		Xe

13. Xe $F_{6}$ on complete hydrolysis gives

a)		Xe
b)		Xe $O_{2}$
c)		Xe $O_{3}$
d)		Xe $O_{4}$

14. Which is a planar molecule?

a)		Xe $O_{4}$
b)		Xe $F_{4}$
c)		XeO $F_{4}$
d)		Xe $O_{2} F_{2}$

15. Which of the following cannot be formed ?

a)		${He}^{2 +}$
b)		${He}^{+}$
c)		He
d)		${He}_{2}$

16. Sea divers go deep in the sea water with a mixture of which of the following gases?

a)		$O_{2}$ and He
b)		$O_{2}$ and Ar
c)		$O_{2}$ and C $O_{2}$
d)		C $O_{2}$ and Ar

17. In the complexes ${[Fe {(H_{2} O)}_{6}]}^{3 +}$ , ${[Fe {(CN)}_{6}]}^{3 -}$ , ${[Fe {(C_{2} O_{4})}_{3}]}^{3 -}$ and ${[Fe {Cl}_{6}]}^{3 -}$ more stability is shown by

a)		${[Fe {(H_{2} O)}_{6}]}^{3 +}$
b)		${[Fe {(CN)}_{6}]}^{3 -}$
c)		${[Fe {(C_{2} O_{4})}_{3}]}^{3 -}$
d)		${[Fe {Cl}_{6}]}^{3 -}$

18. Which of the following cannot show linkage isomerism ?

a)		${N O_{2}}^{-}$
b)		SC $N^{-}$
c)		C $N^{-}$
d)		N $H_{3}$

19. Which statement is incorrect

a)		Ni ${(CO)}_{4}$ -Tetrahedral, paramagnetic
b)		${[Ni {(CN)}_{4}]}^{2 -}$ Square planar, diamagnetc
c)		Ni ${(CO)}_{4}$ - Tetrahedral, diamagnetic
d)		${[Ni {(Cl)}_{4}]}^{2 -}$ -Tetrahedral, paramagnetic

20. Coordination number of Ni in ${[Ni {(C_{2} O_{4})}_{3}]}^{4 -}$ is

a)		3
b)		6
c)		4
d)		5

21. Some salts although containing two different metallic elements give test for only one of them in solution. Such salts are

a)		complex salts
b)		double salts
c)		normal salts
d)		none

22. Which of the following will exhibit optical isomerism ?

a)		${[Cr {(en) (H_{2} O)}_{4}]}^{3 +}$
b)		${[Cr {(en)}_{3}]}^{3 +}$
c)		trans- ${[Cr (en) ({Cl}_{2}) {({NH}_{3})}_{2}]}^{+}$
d)		${[Cr {(N H_{3})}_{6}]}^{3 +}$

23. The number of isomers exhibited by [Cr ${(N H_{3})}_{3} {Cl}_{3}]$ is

a)		2
b)		3
c)		4
d)		5

24. Correct formula of the complex formed in the brown ring test for nitrates is

a)		FeS $O_{4} . NO$
b)		${[Fe {(H_{2} O)}_{5} NO]}^{2 +}$
c)		${[Fe {(H_{2} O)}_{5} NO]}^{+}$
d)		${[Fe {(H_{2} O)}_{5} NO]}^{3 +}$

25. Which one of the following is an example of octahedral complex ?

a)		${[Fe F_{6}]}^{3 -}$
b)		${[Zn {(N H_{3})}_{4}]}^{2 +}$
c)		${[Ni {(CN)}_{4}]}^{2 -}$
d)		${[Cu {(N H_{3})}_{4}]}^{2 +}$

26. Which of the following species represent the example of ds $p^{2}$ - hybridisation?

a)		${[Fe {(CN)}_{6}]}^{3 -}$
b)		${[Ni {(CN)}_{4}]}^{2 -}$
c)		${[Zn {(N H_{3})}_{4}]}^{2 +}$
d)		${[Fe F_{6}]}^{3 -}$

27. Which is not $π -$ bonded complex ?

a)		Zeise's salt
b)		Ferrocene
c)		Dibenzene chromium
d)		Tetraethyl lead

28. Which of the following is paramagnetic ?

a)		${[Co {(N H_{3})}_{6}]}^{3 +}$
b)		[Ni ${(CO)}_{4}$ ]
c)		${[Ni {(N H_{3})}_{4}]}^{2 +}$
d)		${[Ni {(CN)}_{4}]}^{2 -}$

29. The oxidation state of Fe in brown complex [Fe ${(H_{2} O)}_{5} No] S O_{4}$ is

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

30. Which of the following is organo-metallic compound?

a)		Ti ${(C_{2} H_{4})}_{4}$
b)		Ti ${({OC}_{2} H_{5})}_{4}$
c)		Ti ${(OCOC H_{3})}_{4}$
d)		Ti ${({OC}_{6} H_{5})}_{4}$

31. $[Co {(N H_{3})}_{5} Br]$ S $O_{4}$ and $[Co {(N H_{3})}_{5} S O_{4}]$ $Br$ are example of which type of isomerism ?

a)		linkage
b)		geometrical
c)		ionisation
d)		optical

32. Carnalite is a

a)		simple salt
b)		double salt
c)		alum
d)		coordination compund

33. The green pigment present in plants, chlorophyll contains the metal

a)		Al
b)		Fe
c)		Mg
d)		Ca

34. The oxidation number of Pt in ${[Pt (C_{2} H_{4}) {Cl}_{3}]}^{-}$ is

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

35. When oxalic acid is dehydrated by conc. $H_{2} S O_{4}$ , then it forms

a)		C+C $O_{2}$
b)		CO
c)		C $O_{2}$
d)		CO+C $O_{2}$

36. Which of the following formula represents the fuming sulphuric acid (Oleum) ?

a)		$H_{2} S_{2} O_{4}$
b)		$H_{2} S O_{5}$
c)		$H_{2} S_{2} O_{7}$
d)		$H_{2} S_{2} O_{8}$

37. Bond angle is minimum for

a)		$H_{2} O$
b)		$H_{2} S$
c)		$H_{2} Se$
d)		$H_{2} Te$

38. As a fising agent in photography, sodium thiosulphate is used for

a)		Dissolving out unreacted silver bromide
b)		Converting silver halides to metallic silver
c)		Reducing solubility of AgBr
d)		Preventing overdeveloping and fogging

39. The acid used in lead storage cells is

a)		Phosphoric acid
b)		Nitric acid
c)		Sulphuric acid
d)		Hydrochloric acid

40. The temperature of gas is raised from $27^{0} C$ to $927^{0} C, the root mean$ square velocity is

a)		$\sqrt{927 / 27}$ times the earlier value
b)		Same as before
c)		halved
d)		doubled

41. 50 ml of $H_{2} diffuses$ through a small hole from vessel in 20 minutes time. Time taken for 40 ml of Oxygen to diffuse out under similar conditions will be

a)		12min
b)		64 min
c)		8 min
d)		32 min

42. The van der Waal's equation of state reduces itself to the ideal gas equation at

a)		high pressure and low temperature
b)		low pressure and low temperature
c)		low pressure and high temperature
d)		high pressure and high temperature

43. Use of the hot air balloons in sports and metrological observations is an application of

a)		Boyle's Law
b)		Newton's Law
c)		Charle's Law
d)		Brown's Law

44. If the four tubes of a car are filled to the same pressure with $N_{2}, O_{2}, H_{2} and He,$ then which one will be filled first?

a)		$N_{2}$
b)		$O_{2}$
c)		$H_{2}$
d)		$H_{e}$

45. Which is disfilled first?

a)		Liquid ${CO}_{2}$
b)		Liquid $N_{2}$
c)		Liquid $O_{2}$
d)		Liquid $H_{2}$

46. The kinetic energy of two moles of $N_{2}$ at $27^{0} C is$

a)		5491.6 J
b)		6491.6 J
c)		7491.6 J
d)		8882.4 J

47. Which of the following is hcp crystal structure?

a)		NaCl
b)		CsCl
c)		Zn
d)		RbCl

48. Bragg's equation is given by

a)		n $λ = 2 θ Sin θ$
b)		n $λ = 2 d Sin θ$
c)		2n $λ = d Sin θ$
d)		n $λ = \frac{1}{2} d Sin θ$

49. In a crystel a $\neq b \neq c, α = r = 90^{0} and β \neq 90^{0} .$ It is

a)		monoclinic
b)		Rhombic
c)		Trigonal
d)		Tetragonal

50. How many kinds of space lattices are possible in a crystal?

a)		23
b)		7
c)		230
d)		14