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Question Bank No: 1

1. Which of the following on oxidation gives $H_{2} O_{2} ?$

a)		2-ethyleanthraquinol
b)		2-ethyleanthraquinone
c)		anthracene
d)		2-ethyleanthracene

2. Water is said to be permenantly hard when it contains

a)		sulphates of Mg and Ca
b)		Bicarbonates of Mg and Ca
c)		sulphates of Cu and Hg
d)		Carbonates and Bicarbonates of Mg and Cu

3. Which of the following evolve Hydrogen on reacting with cold dilute nitric acid?

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

4. $D_{2} O$ is used more in

a)		chemical industry
b)		nuclear reactor
c)		pharmaceutical preparation
d)		insecticide preparation

5. The structure of $H_{2} O_{2} is$

a)		Planar
b)		non planar
c)		spherical
d)		linear

6. The absorption of hydrogen by palladium is called

a)		hydration
b)		reduction
c)		occlusion
d)		hydrogenation

7. The percentage by weight of hydrogen in $H_{2} O_{2} is$

a)		5.88
b)		6.25
c)		25
d)		50

8. Pure water can be obtained from sea water by

a)		centrifugation
b)		plasmolysis
c)		reverse osmosis
d)		sedimentation

9. In Bosch's process which gas is utilised for the production of hydrogen gas?

a)		producer gas
b)		water gas
c)		coal gas
d)		none

10. 1ml of $H_{2} O_{2}$ solution gives 10 ml of $O_{2}$ at NTP. It is

a)		$10 vol . H_{2} O_{2}$
b)		$20 vol . H_{2} O_{2}$
c)		$30 vol . H_{2} O_{2}$
d)		$40 vol . H_{2} O_{2}$

11. Fire extinguishers contain $H_{2} {SO}_{4}$ and

a)		${NaHCO}_{3}$ and ${Na}_{2} {CO}_{3}$
b)		${NaHCO}_{3}$
c)		${Na}_{2} {CO}_{3}$
d)		${CaCO}_{3}$

12. Alkali metals impart colour to Bunsen flame due to

a)		low ionisation energies
b)		low melting points
c)		their softness
d)		the presence of one electron in the outer most shell

13. Which of the following alkali metal hydroxides is the strongest base

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

14. Which halide has the highest melting point?

a)		NaCl
b)		NaBr
c)		NaF
d)		NaI

15. A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

a)		sodium atoms
b)		sodium hydride
c)		sodium amide
d)		solvated electrons

16. The alkali metal that reacts with nitrogen directly to form nitride is

a)		Li
b)		Na
c)		K
d)		Rb

17. Which is the weakest reducing agent?

a)		Li
b)		Na
c)		K
d)		Rb

18. Main process for the manufacture of sodium carbonate is

a)		Castner process
b)		Solvay process
c)		Down process
d)		Nelson process

19. When NaOH is made, the gas released at Cathode is

a)		${Cl}_{2}$
b)		$H_{2}$
c)		$O_{2}$
d)		$H_{2} O$

20. Sodium metal reacts with ${Al}_{2} O_{3}$ at high temperature to give a sodium compound X. X reacts with ${CO}_{2}$ in water to form Y. Y is

a)		${Na}_{2} O_{2}$
b)		${Na}_{2} O$
c)		${Na}_{2} {CO}_{3}$
d)		${NaAlO}_{2}$

21. Setting of cement is an

a)		Exothermic reaction
b)		Endothermic reaction
c)		Neither exothermic nor endothermic
d)		None

22. Nitrolim is

a)		${CaCN}_{2} + C$
b)		$Ca (CN)_{2} + C$
c)		${CaC}_{2} + C$
d)		All

23. Chemical A is used for water softening to remove temporary hardness. A reacts with Sodium Carbonite to give Caustic Soda. When ${CO}_{2}$ is bubbled through A, it turns cloudy. What is A?

a)		${CaCO}_{3}$
b)		$CaO$
c)		$Ca (OH)_{2}$
d)		$Ca ({HCO}_{3})_{2}$

24. Epsom Salt is

a)		${MgSO}_{4} . 7 H_{2} O$
b)		$Mg (OH)_{2}$
c)		$2 {CaSO}_{4} . H_{2} O$
d)		${BaSO}_{4}$

25. Which of the following decomposes on heating?

a)		${MgCO}_{3}$
b)		${Na}_{2} {CO}_{3}$
c)		$K_{2} {CO}_{3}$
d)		All

26. What is X in the following reaction? ${MgCl}_{2} + H_{2} O \to X + 2 HCl$

a)		MgO
b)		Mg
c)		$Mg (OH)_{2}$
d)		$Mg (OH) Cl$

27. On heating quick lime with coke in an electric furnace, we get

a)		$Ca and {CO}_{2}$
b)		${CaCO}_{3}$
c)		$CaO$
d)		${CaC}_{2}$

28. The chemical used for cooling in refrigeration is

a)		${CO}_{2}$
b)		${NH}_{4} OH$
c)		${NH}_{4} Cl$
d)		Liquid ${NH}_{3}$

29. Boron compounds behave as Lewis acid because of their

a)		acidic nature
b)		covalent nature
c)		electron deficient character
d)		ionisation property

30. Which one of the following is strongest Lewis acid?

a)		${BF}_{3}$
b)		${BCl}_{3}$
c)		${BBr}_{3}$
d)		${BI}_{3}$

31. Which of the following type of forces bind together the carbon atoms in diamond

a)		ionic
b)		covalent
c)		dipolar
d)		van der Waals

32. Which one of the following is used in the industrial preparation of nitric acid by Ostwald's process?

a)		$N_{2}$
b)		${NH}_{4} {NO}_{3}$
c)		$N_{2} O_{5}$
d)		${NH}_{3}$

33. Carbon Monoxide reacts with Chlorine in the presence of sunlight to give

a)		Phosgene
b)		COCl
c)		Phosphine
d)		${CCl}_{4}$

34. The type of hybridisation of boron in diborane is

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

35. The Halide which is not hydrolysed is

a)		${SiCl}_{4}$
b)		${SiF}_{4}$
c)		${CCl}_{4}$
d)		${PbCl}_{4}$

36. White Lead is

a)		basic lead acetate
b)		acidic lead carbonate
c)		basic lead carbonate
d)		basic lead hydroxide

37. Carborundum is

a)		${Al}_{2} ({SO}_{4})_{3}$
b)		${Al}_{2} O_{3} .2 H_{2} O$
c)		${AlCl}_{3}$
d)		$SiC$

38. Which of the following is a tetrabasic acid?

a)		Orthophosphoric acid
b)		Hypophosphorous acid
c)		Metaphosphoric acid
d)		Pyrophosphoric acid

39. Phosphine is prepared by the action of

a)		$P and H_{2} {SO}_{4}$
b)		$P and NaOH$
c)		$P and H_{2} S$
d)		$P and {HNO}_{3}$

40. Which one of the following compounds does not exist?

a)		${NCl}_{5}$
b)		${AsF}_{5}$
c)		${SbCl}_{5}$
d)		${PF}_{5}$

41. In $P_{4} O_{6},$ the number of oxygen atoms bonded to each P atom is

a)		1.5
b)		2
c)		3
d)		4

42. Which oxide of Nitrogen is obtained on heating Ammonium Nitrate at $250^{0} C$

a)		Nitric Oxide
b)		Nitrous Oxide
c)		Nitrogen Dioxide
d)		Dinitrogen Tetraoxide

43. The number $σ$ bonds in $P_{4} O_{10} is$

a)		6
b)		16
c)		20
d)		7

44. When conc. $H_{2} {SO}_{4}$ comes in contact with sugar, it becomes black due to

a)		hydrolysis
b)		hydration
c)		decolourisation
d)		dehydration

45. Oleum is

a)		Castor oil
b)		Oil of Vitriol
c)		Fuming $H_{2} {SO}_{4}$
d)		None of them

46. Which is an oxidising substance amongst the following

a)		${CO}_{2}$
b)		${NO}_{2}$
c)		${SO}_{2}$
d)		${SO}_{3}$

47. Which of the following does not react with AgCl?

a)		${Na}_{2} S_{2} O_{3}$
b)		${NH}_{4} OH$
c)		${NaNO}_{3}$
d)		${Na}_{2} {CO}_{3}$

48. What is the oxidation number of Sulphur in ${Na}_{2} S_{4} O_{6}$

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

49. Which of the following Hydrides has the lowest boiling point?

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

50. Which one is anhydride of ${HClO}_{4}$

a)		${Cl}_{2} O$
b)		${ClO}_{2}$
c)		${Cl}_{2} O_{6}$
d)		${Cl}_{2} O_{7}$