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Question Bank No: 6

1. When $H_{2} S$ is passed through nitric acid, the product is

a)		rhombic S
b)		prismatic S
c)		amorphous S
d)		monoclinic S

2. Which of the following does not form its oxyacids?

a)		Fluorine
b)		Chlorine
c)		Bromine
d)		Iodine

3. Bleaching powder is obtained by the action of Chlorine gas and

a)		Dilute solution of $Ca (OH)_{2}$
b)		Concentrated solution of $Ca (OH)_{2}$
c)		Dry CaO
d)		Dry slaked lime

4. The bleaching action of Chlorine is due to

a)		reduction
b)		hydrogenation
c)		chlorination
d)		oxidation

5. Which is the weakest acid

a)		HF
b)		HCl
c)		HBr
d)		HI

6. Which of the following Fluorides of Xenon is impossible

a)		${XeF}_{2}$
b)		${XeF}_{3}$
c)		${XeF}_{4}$
d)		${XeF}_{6}$

7. ${XeF}_{2}$ molecule is

a)		linear
b)		trigonal planar
c)		pyramidal
d)		square planar

8. In the clathrates of xenon with water, the nature of bonding between xenon and water is

a)		covalent
b)		hydrogen bonding
c)		co-ordinate
d)		dipole induced dipole interaction

9. The coloured discharge tubes for advertisement mainly contain

a)		xenon
b)		helium
c)		neon
d)		argon

10. ${XeF}_{4}$ on partial hydrolysis produces

a)		${XeF}_{2}$
b)		${XeOF}_{2}$
c)		${XeOF}_{4}$
d)		${XeO}_{3}$

11. Of the following which has the highest magnetic moment?

a)		$V^{3 +}$
b)		${Mn}^{2 +}$
c)		${Fe}^{2 +}$
d)		${Cu}^{2 +}$

12. Sodium thiosulphate is used in photography because of its

a)		oxidising behaviour
b)		reducing behaviour
c)		complexing behaviour
d)		photochemical behaviour

13. Which of the following ions will finally give a black precipitate with ${Ag}^{+}$ ion

a)		${SO}_{3}^{2 -}$
b)		${Br}^{-}$
c)		${C rO}_{4}^{2 -}$
d)		${S_{2} O}_{3}^{2 -}$

14. Which one of the following metal ions is colourless?

a)		$V^{2 +}$
b)		${Cr}^{3 +}$
c)		${Zn}^{2 +}$
d)		${Ti}^{3 +}$

15. German silver does not contain

a)		$Cu$
b)		Zn
c)		Ni
d)		Mn

16. The products of reaction of copper with dilute nitric acid are

a)		$Cu ({NO}_{3})_{2} + H_{2}$
b)		$Cu ({NO}_{3})_{2} + H_{2} O + NO$
c)		$Cu ({NO}_{3})_{2} + H_{2} O + {NO}_{2}$
d)		$Cu {NO}_{3} + H_{2}$

17. Transition metals

a)		exhibit diamagnetism
b)		undergo inert pair effect
c)		do not form alloys
d)		show variable oxidation states

18. Which one of the following ions has the lowest density?

a)		copper
b)		nickel
c)		scandium
d)		zinc

19. Zn does not show variable valency because of

a)		complete 'd' subshell
b)		inert pair effect
c)		$4 s^{2}$ subshell
d)		none of them

20. The starting material for the manufacture of ${KMnO}_{4} is$

a)		pyrolusite
b)		mangatite
c)		magnatite
d)		Haematite

21. Mercury sticks to the surface of the glass when it comes in contact with

a)		${Hg}_{2} O$
b)		${HNO}_{3}$
c)		$O_{3}$
d)		grease

22. A white solid halide of mercury forms a black mixture with ${NH}_{4} OH .$ The halide is

a)		${HgCl}_{2}$
b)		${HgI}_{2}$
c)		${Hg}_{2} I_{2}$
d)		${Hg}_{2} {Cl}_{2}$

23. Oxidation state of osmium in ${OsO}_{4} is$

a)		+4
b)		+6
c)		+7
d)		+8

24. In Nessler's reagent, the ion present is

a)		${HgI}^{2 -}$
b)		${HgI}_{4}^{2 -}$
c)		${Hg}^{+}$
d)		${Hg}^{2 +}$

25. Across the lanthanide series, the basicity of the lanthanide hydroxides

a)		increases
b)		decreases
c)		first increases and then decreases
d)		first decreases and then increases

26. Which of the following ligands is a bidentate?

a)		EDTA
b)		Ethylenediamine
c)		Acetate
d)		Pyridine

27. In which there is outer orbital hybridisation?

a)		$[Zn ({NH}_{3})_{4}]^{2 +}$
b)		$[Co ({NH}_{3})_{6}]^{3 +}$
c)		$[Cr ({NH}_{3})_{6}]^{3 +}$
d)		$[V ({NH}_{3})_{6}]^{3 +}$

28. $K_{4} [Fe ({CN)}_{6}]$ is called

a)		Potassium hexacyanoferrate(II)
b)		Potassium hexacyanoferrate(III)
c)		Potassium ferricyanide
d)		Prussian blue

29. Which complex has square planar structure?

a)		$Ni (CO)_{4}$
b)		$[{NiCl}_{4}]^{2 -}$
c)		$[{Ni (H_{2} O)}_{6}]^{2 +}$
d)		$[Cu ({NH}_{3})_{4}]^{2 +}$

30. In the compound lithiumtetrahydridoaluminate, the ligand is

a)		$A^{+}$
b)		H
c)		$H^{-}$
d)		none of these

31. The unpaired electrons in $Ni (CO)_{4}$ are

a)		0
b)		1
c)		3
d)		4

32. Which of the following compounds is not coloured?

a)		${Na}_{2} [{CuCl}_{4}]$
b)		${Na}_{2} [{CdCl}_{4}]$
c)		$K_{4} [Fe (CN)_{6}]$
d)		$K_{3} [Fe (CN)_{6}]$

33. ${CuSO}_{4}$ dissolves in ${NH}_{3}$ due to formation of

a)		$Cu (OH)_{2}$
b)		$[Cu ({NH}_{3})_{4}] {SO}_{4}$
c)		$[Cu ({NH}_{3})_{4} (OH)_{2}]$
d)		$CuO$

34. Which of the following is paramagnetic?

a)		$[Fe (CN)_{6}]^{4 -}$
b)		$[Ni (CO)_{4}]$
c)		$[Ni (CN)_{4}]^{2 -}$
d)		$[{CoF}_{6}]^{3 -}$

35. The coordination number of Fe(II) in oxyhaemoglobin is

a)		6
b)		4
c)		8
d)		10

36. In $[Cr (C_{2} O_{4})_{3}]^{3 -},$ the isomerism shown is

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

37. Both geometrical and optical isomerisms are shown by

a)		$[Co (en)_{2} {Cl}_{2}]^{+}$
b)		$[Co ({NH}_{3})_{5} Cl]^{2 +}$
c)		$[Co ({NH}_{3})_{4} {Cl}_{2}]^{+}$
d)		$[Cr (ox)_{3}]^{3 -}$

38. A square planar complex is formed by hybrisdisation of which atomic orbitals?

a)		s, $p_{x}, p_{y}, d_{yz}$
b)		s, $p_{x}, p_{y}, d_{x^{2} - y^{2}}$
c)		s, $p_{x}, p_{y}, d_{z^{2}}$
d)		s, $p_{x}, p_{y}, d_{xy}$

39. The type of isomerism present in nitropentaamminechromium (III)chloride is

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

40. Hybridisation of $Fe$ in $K_{3} [Fe (CN)_{6}]$ is

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

41. Froth floatation is used for the concentration of

a)		oxide ores
b)		sulphide ores
c)		chloride ores
d)		amalgams

42. In metallurgical processes, the flux used for removing acidic impurities is

a)		silica
b)		NaCl
c)		Lime Stone
d)		Sodium Carbonate

43. The main function of roasting is

a)		to remove the volatile matter
b)		to convert the ore into oxide
c)		both (a) and (b)
d)		to make slag

44. Which of the following metals is obtained by leaching its ores with dilute cyanide solution?

a)		Silver
b)		Titanium
c)		Vanadium
d)		Zinc

45. Which of the following is not employed for refining of metal

a)		poling
b)		leaching
c)		electrolysis
d)		liquation

46. Cupellation process is used in the metallurgy of

a)		Cu
b)		Ag
c)		Zn
d)		Al

47. In the extraction of iron, slag is produced. Slag is

a)		Co
b)		${FeSiO}_{3}$
c)		${MgSiO}_{3}$
d)

48. Which of the following is extracted by the electrometallurgical method?

a)		Cu
b)		Fe
c)		Na
d)		Ag

49. Galena is an ore of

a)		Pb
b)		Hg
c)		Sn
d)		Zn

50. The digestion of fats in the intestines is aided by

a)		diffusion
b)		protection
c)		peptization
d)		emulsification