CET / SIET SCHOLARSHIP PRACTICE- TEST 3 (SUBJECT: CHEMISTRY)

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"Please Answer all the Questions to know the correct Answers in view score after submission" .

(Estimated Answering Time Duration: 60 Min to 75 Min)

1. 27 gram of Al will react completely with how many grams of oxygen?

1 point

a) 8 gram

b) 16 gram

c) 32 gram

d) 24 gram

Clear selection

2. The principle quantum number of an atom is related to the

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a) Size of the orbital

b) Spin angular momentum

c) Orbital angular momentum

d) Orientation of the orbital in space

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3. The IP1, IP2, IP3, IP4 and IP5 of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. The element is likely to be

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a) Na

b) Si

c) F

d) Ca

Clear selection

4. In Mendeleev’s periodic table some pairs of element do not allow increasing order of atomic weight known as anomalous pair. The correct example of anomalous pair is

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a) Cl, Ar

b) Th, Pa

c) Te, In

d) Co, Ld

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5. The structure of IF7 is

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a) Square pyramidal

b) Trigonal bi pyramidal

c) Octahedral

d) Pentagonal bi pyramidal

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6. 4.48 L of an ideal gas at S.T.P requires 12 calories to raise its temperature by 15 degree Celsius at constant volume. The Cp of the gas is

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a) 3 Cal

b) 4 Cal

c) 7 Cal

d) 6 Cal

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7.Hydrolysis of sodium acetate will give

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a) Acedic solution

b) Basic solution

c) Neutral solution

d) Normal solution

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1 point

a) +4

b) +3

c) +2

d) -2

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9. Hydrogen readily combines with metals and thus shows its

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a) Electropositive character

b) Electronegitive character

c) Both (A) & (B)

d) None of these

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10. The property of hydrogen which distinguishes it from alkali metals

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a) Its electropositive character

b) Its affinity for non metal

c) Its reducing character

d) Its non metallic character

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11. Which of the following statement about LiCl and NaCl is correct

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a) LiCl has higher melting point than NaCl

b) LiCl dissolves in water whereas NaCl doesnot

c) LiCl would ionize in water more than NaCl

d) Fused LiCl would be less conducting than NaCl

Clear selection

12.

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a) HCl and Aluminum metal

b) Aluminum and chlorine gas

c) Hydrogen chloride gas and Aluminum metal

d) None of these

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13. When Al is added to KOH solution then

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a) No action takes place

b) Oxygen is evolved

c) Water is produced

d) Hydrogen is evolved

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14.

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a) Benzene chloro ketone

b) Benzyl chloride

c) Chloro phenyl ketone

d) Benzene carbonyl chloride

Clear selection

15. Which of the following compounds does not dissolve in conc. sulfuric acid even on warming?

1 point

a) Ethylene

b) Benzene

c) Hexane

d) Aniline

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16. Which of the following has the minimum boiling point?

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a) Isobutane

b) 1-butyne

c) 1- butene

d) N-butane

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17. Nitrobenzene can be prepared from benzene by using a mixture of conc. Nitric acid and Conc. Sulfuric acid in the nitrating mixture Nitric acid acts as a

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a) Base

b) Acid

c) Reducing agent

d) Catalyst

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18. Persistent pesticides such as DDT pass into food chain and increase in amount for unit weight of organism due to their accumulation in fat this phenomenon is called

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a) Biomagnifications

b) Biodegradation

c) Biosynthesis

d) Decomposition

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19. Iron and manganese present in water are removed by

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a) Chlorination

b) Aeration

c) Filtration

d) Lime soda treatment

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20. Drained sewage as biological oxygen demand (BOD):

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a) More than that of water

b) Less than that of water

c) Equal to that of water

d) None of the above

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21. Na and Mg crystallize in bcc and fcc type crystals, respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystals is

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a) 4 and 2

b) 9 and 14

c) 14 and 9

d) 2 and 4

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22. Lithium forms body centered cube structure. The length of the side of its unit cell is 351 pm. Atomic radius of the Lithium will be

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a) 300 pm

b) 240 pm

c) 152 pm

d) 75 pm

Clear selection

23. During the depression in freezing point experiment, an equilibrium is established between themolecules of

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a) Liquid solvent and solid solvent

b) Liquid solute and solid solvent

c) Liquid solute and solid solute

d) Liquid solvent and solid solute

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24. If 3 grams of glucose (mol. Wt. 180) is dissolved in 60 gm of water at 15 degree Celsius. Then the osmotic pressure of this solution will be

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a) 0.34 atm

b) 0.65 atm

c) 6.57 atm

d) 5.57 atm

Clear selection

25. Conductivity of a strong electrolyte

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a) Increase on dilution

b) Does not change considerably on dilution

c) Decrease on dilution

d) Depends on density

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26. Which of the following is conductor of electricity?

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a) Diamond

b) Graphite

c) Carborandum

d) Silica

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27. Which of the following catalyses the conversion glucose into ethanol

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a) Zymase

b) Invertase

c) Maltase

d) Diastase

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28. When a catalyst is added to a system the

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a) Value of equilibrium constant is decreased

b) The rate of forward reaction is increased and that of backward reaction is decreased

c) Equilibrium concentration are unchanged

d) Equilibrium concentration are increased

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29. In which of the following process, platinum is used as a catalyst

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a) Oxidation of ammonia to form nitric acid

b) Hardening of oils

c) Production of synthetic rubber

d) Synthesis of methanol

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30. The role of a catalyst in a reversible reaction is to

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a) Increase the rate of forward reaction

b) Decreased the rate of backward reaction

c) Alter the equilibrium constant of the reaction

d) Allow the equilibrium to be achieved quickly

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31. Roasting is generally done in case of the following

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a) Oxide ores

b) Sillicate ores

c) Sulphide ores

d) Carbonate ores

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32. A substance which reacts with gangue to form fusible material is called

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a) Flux

b) Catalyst

c) Ore

d) Slag

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33. Purpose of smelting of an ore is

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a) To oxidize it

b) To reduce it

c) To remove vaporizable impurities

d) To obtain an alloy

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34. Regular use of which of the following fertilizer increase the acidity of soil?

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a) Potassium nitrite

b) Urea

c) Super phosphate of lime

d) Ammonium sulphate

Clear selection

35. In Tetraphosphorus hexoxide and Phosphorus pentoxide ,the number of oxygen atoms bonded to each phosphorus atoms are respectively

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a) 3 & 3

b) 4 & 4

c) 3 & 4

d) 4 & 3

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36. Who among the following first prepared a stable compound of noble gas?

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a) Rutherford

b) Rayleigh

c) Ramsay

d) Neil bartlett

Clear selection

37. Rusting of iron in moist air involves

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a) Loss of electrons by iron

b) Gain of electrons by iron

c) Neither gain nor Loss of electrons

d) Hydration of iron

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38. One of the important use of ferrous sulphate is in the

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a) Manufacture of blue black ink

b) Manufacture of chalks

c) Preparation of hydrogen sulphide

d) Preparation of anhydrous ferric chloride

Clear selection

39. Zinc and Mercury donot show variable valency like d- block elements because

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a) They are soft

b) Their d-shells are complete

c) They have only two electrons in the outermost subshell

d) Their d-shells are incomplete

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40. Trunbulls blue is compound

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a) Ferricyanide

b) Ferrous Ferri cyanide

c) Ferrous cyanide

d) Ferri ferro cyanide

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41. Which reagent can be used to identify nickel ion?

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a) Resorcinol

b) Diemethyl glyoxime [DMG]

c) Diphenyl benzidine

d) Potassium ferrous cyanide

Clear selection

42.

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a) Benzoyl chloride

b) Benzyl chloride

c) o-and p-chlorotoluene

d) m- chlorotoluene

Clear selection

43. Chlorobenzene can be prepared by reacting aniline with

1 point

a) Hydrochloric acid

b) Cuprous chloride

c) Chlorine in presence of anhydrous aluminum chloride

d) Nitrous acid followed by heating with cuprous chloride

Clear selection

44. HBr reacts fastest with

1 point

a) 2-methylpropan-2-ol

b) Propan-1-ol

c) Propan-2-ol

d) 2-methylpropan-1-ol

Clear selection

45. Acetyl bromide with excess of Methylmagnesium Iodide followed by treatment with asaturated solution of Ammonium Chloride gives

1 point

a) Acetyl Iodide

b) Acetamide

c) 2-methyl-2-propanol

d) Acetone

Clear selection

46. Phenol reacts with bromine in carbon disulphide at low temperature to give

1 point

a) m-bromophenol

b) o-and p-bromophenol

c) p-bromophenol

d) 2, 4, 6- tribromophenol

Clear selection

47. Which is used has an antifreeze?

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a) Glycol

b) Ethylalcohol

c) Water

d) Methanol

Clear selection

48. Which of the following compounds would undergo cannizzaro reaction-

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a) Acetaldehyde

b) Benzaldehyde

c) Propionaldehyde

d) Anisole

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49. When Acetaldehyde is treated with aluminum ethoxide, it forms

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a) Ethyl alcohol

b) Ethyl acetate

c) Acetic acid

d) Methyl propionate

Clear selection

50. Which one of the following undergoes reaction with 50 % sodium hydroxide solution to give the corresponding alcohol and acid

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a) Benzoic acid

b) Benzaldehyde

c) Butanol

d) Phenol

Clear selection

51. On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is

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a) An alkanol

b) An alknediol

c) An alkyl cyanide

d) An alkyl isocyanide

Clear selection

52. Reduction of methyl isocyanide gives

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a) Ehaylamine

b) Methylamine

c) Di methylamine

d) Tri methylamine

Clear selection

53. Which carbohydrate is used in silvering of mirrors?

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a) Sucrose

b) Starch

c) Glucose

d) Cellulose

Clear selection

54. Animals starch is the name given for

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a) Glycogens

b) Lactogen

c) Cellulose

d) None of these

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55. Common table sugar is more formally described as

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a) Glucose

b) Lactose

c) Maltose

d) Sucrose

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56. Trans-form of polyisoprene is

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a) Gutta percha

b) Hydrochloride rubber

c) Buna-N

d) Synthetic rubber

Clear selection

57. Which of the following statement is correct regarding the drawbacks of raw rubber?

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a) It is plastic in nature

b) It has little durability

c) It has large water-absorption capacity

d) All of these

Clear selection

58. Which of the following is known as broad spectrum antibiotic?

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a) Streptomycin

b) Ampicillin

c) Chloramphenicol

d) Penicillin

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59. Which are the following can possibly be used as analgesic without causing addiction and modification?

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a) Morphine

b) N-acetyl-para-aminophenol

c) Diazepam

d) Tetrahydrocatenol

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60. 2-Acetoxybenzoic acid is called

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a) Antiseptic

b) Aspirin

c) Antibiotic

d) Mordant dye

Clear selection

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