CET / SIET SCHOLARSHIP PRACTICE-TEST 2 (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 point

Option 1

Option 2

Option 3

Option 4

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2. A gas absorbs a photon of 355 nm and emits two wavelength, if one of the emission is at 680 nm, the other is at

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518 nm

1035 nm

325 nm

743 nm

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3. According to periodic law of elements, the variation in properties of elements is related to their

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Atomic number

Atomic mass

Nuclear mass

Neutron- proton ratio

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4. Which of the following elements has maximum atomic volume?

1 point

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2,3,1

1,2,3

4,1,2

3,2,1

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1 point

57.3 KJ

2.865 KJ

2.292 KJ

0.573 KJ

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7.The oxidation of sulphur dioxide by oxygen to sulphur trioxide is an exothermic reaction. The yield of sulphur trioxide will be maximum if

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Temperature is increased and pressure is kept constant

Temperature is reduced and pressure is increased

Both Temperature pressure are increased

Both Temperature pressure are reduced

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1 point

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9. Hydrogen acts as a reducing agent and thus resembles

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Halogen

Noble gas

Radioactive elements

Alkali metals

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10. Which is distilled first?

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Liquid carbon dioxide

Liquid Nitrogen

Liquid oxygen

Liquid hydrogen

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11. Which of the following is not correct about the solution when moderate amount of sodium metal is dissolved in liquid ammonia at low temperature?

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Sodium ions are produced in solution

We get a blue colored solution

The solution act as a good conductor of electricity

Liquid ammonia remains diamagnetic

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12. In which of the following the inert pair effect is most prominent

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13. Which of the following exist as a covalent crystal in the solid state?

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Iodine

Silicon

Sulphur

Phosphorus

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14. The compound which has one isopropyl group is

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2, 2 3, 3-tetramethylpentane

2, 2-dimethylpentane

Option 3

2-methylpentane

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15. Iodoethane reacts with sodium in presence of ether. The product is

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Pentane

Propane

Butene

Butane

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16. Suitable for preparation of higher alkanes from a lower alkyl halide is subjected to

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Reduction

Hoffmann Bromamide reaction

Hunsdiecker reaction

Wurtz reaction

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17. Benzene reacts with fuming sulphuric acid to give

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Sodium benzene sulphotane

Benzene sulphonic acid

Sodium benzonate

All of these

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18. Oxides of nitrogen

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Are toxic to living tissues

Cause respiratory diseases in children

Retard the rate of photosynthesis

Causes all of these

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19. Atmospheric gases are found to trap the sun s heat near the earth’s surface and keep it warm.This effect is called

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Green house effect

Joules effect

Thermal effect

None of these

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20. Soil pollution is due to

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Insecticides

Pesticides

Herbisides

All of these

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21. Graphite is an example of

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Ionic solid

Covalent solid

Molecular solid

Metalic crystal

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22. Which is amorphous solid

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Rubber

Plastic

Glass

All

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23. Calculate the vapor pressure of the solution at 100 degree Celsius containing 3 grams of cane sugar in 33 grams of water. (At. Wt. C= 12, H=1, O=16)

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760 mm

756.90 mm

758.30 mm

None of these

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24. Vapor pressure of a solution is

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Directly proportional to the mole fraction of the solvent

Inversely proportional to the mole fraction of the solute

Inversely proportional to the mole fraction of the solvent

Directly proportional to the mole fraction of the solute

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25. In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

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Produce high purity water

Create potential difference between the two electrodes

Generate heat

Remove absorbed oxygen from electrode surface

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26. When a lead storage battery is discharged, then

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Sulphur dioxide is evolved

Lead sulphate is consumed

Lead is formed

Sulphuric acid is consumed

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27. In adsorption of oxalic acid on activated char coal, the activated char coal is known as

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Adsorbent

Absorbate

Adsorber

Absorber

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28. In a chemical adsorption, how many layers are adsorbed?

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One

Two

Multi

Zero

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29. Adsorption is always

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Endothermic

Exothermic

Either (1) or (2)

None of these

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30. The conversion of maltose to glucose is possible by the enzyme

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Zymase

Lactase

Maltase

Diastase

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31. Which of the following is carbonate ore?

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Pyrolusite

Malachite

Diaspore

Cassiterite

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32. Sulphide ore are generally concentrated by

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Froth Floatation process

Magnetic separation

Gravity separation

By hand picking

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33. Black jack is an ore of

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Chromium

Tin

Zinc

Nickel

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34. The number of P-O-P bonds in cyclic meta-phosproric acid is

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Zero

Two

Three

Four

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35. Which is the most thermodynamically stable allotropic form of phosphorus.

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Red

White

Black

Yellow

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36.

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Square planar

rigonal bi-pyramidal

Trigonal planar

Linear

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37. The coinage metals are

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Iron, cobalt, nickel

Copper and zinc

Copper, silver and gold

Gold and platinum

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38. Platinum, Palladium, Iridium etc., are called noble metals because

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Alfred noble discovered them

They are inert towards many common reagents

They are shining lustrous and pleasing to look at

They are found in active state

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39. The color of light adsorbed by an aqueous solution of Copper Sulfate is

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Orange-red

Blue-green

Yellow

Violet

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40. The coordination number of a metal in coordination compound is

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Same as primary valency

Sum of primary and secondary valencies

Same as secondary valency

None of these

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41. Potassium ferrocyanide is a

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Normal salt

Mixed salt

Double salt

Complex salt

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42. Alkyl halide reacts with dialkyl lithium cuptrate to give

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Alkenes

Alkyl copper halide

Alkanes

Alkenyl halid

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43. Aryl halide is less active than alkyl halide towards nucleophilic substitution because

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Less stable carbonium ion

Due to large C-Cl bond energy

Inductive effect

Resonance stabilization and SP2-hybridization of C attached to halide

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44. Which of the following compound is oxidized to prepare methyl ethyl ketone

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2-propanol

1-butanol

2-butanol

Tert-butyl alcohol

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45. Lucas test is used for

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Alcohols

Amines

Diethylether

Glacial acetic acid

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46. The most suitable method of the separation of a 1:1 mixture of ortho and para nitrophenols is

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Distillation

Sublimation

Crystallization

Chromatography

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47. Which of the following statement is correct regarding case of dehydration in alcohols?

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Primary > secondary

Secondary > tertiary

Tertiary > Primary

None of these

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48. The reagent with which both acetaldehyde and acetone react easily is

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Fehling’s reagent

Grignard reagent

Schiff’s reagent

Tollens’s ragent

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49. Hydrogenation of benzyl chloride in the presence of Pd on Barium Sulfate gives

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Benzyl alcohol

Benzaldehyde

Benzoic acid

Phenol

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50. Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon:

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Butan-2-one

Acetic acid

Acetamide

Ethyl acetate

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51. Which of the following compounds on reduction gives an amide?

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Alkyl cyanide

Aldoxime

Alkylisocyanide

All above

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52. N-ethyl phthalimidde on hydrolysis gives

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Methyl alcohol

Ethyl amine

Dimethylamine

Diethylamine

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53. Vitamin C is:

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Ascorbic acid

Lactic acid

Citric acid

Paracitomol

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54. Which of the following bases is not present in DNA

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Cytosin

Guanine

Uracil

Adenine

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55. Which of the following is not a fat soluble vitamin

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Vitamin A

Vitamin K

Folic acid

Vitamin C

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56. Nylon-66 is a

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Natural polymer

Condensation polymer

Addition polymer

Substitution polymer

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57. Which is not a polymer?

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Sucrose

Enzyme

Starch

Teflon

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58. The antidepressant drugs are

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Cocaine

Vitalin

Methedrine

All of the above

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59. Salol can be used as

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Antiseptic

Antipyretic

Analogesic

Disinfectant

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60. Chloramphenicol is an

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Analogesic

Anaesthetic

Antibiotic

Antiseptic

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