Home › Quizzes › Chemical Sciences

Chemical Sciences

Comprehensive chemistry quiz covering organic, inorganic, physical, and environmental chemistry topics for GATE/AIEEE engineering entrance preparation

15 Questions Published
Play Quiz Practise this topic out loud

Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are true?
A. Frankland reaction: The formation of alkenes by the action of zinc on alkyl halides.
B. Reforming involves conversion of aliphatic into aromatic hydrocarbons.
C. Corey-House reaction can be used to prepare only alkenes with odd number of carbon atoms.

  1. Only A
  2. Only B
  3. Only C
  4. Only A and C
  5. Only A and B
Question 2 Multiple Choice (Single Answer)

Which of the following represents the correct decreasing order of bond angles?

  1. NO2+ > NO2 > NO2-
  2. H2O > H2Se > H2S
  3. CH4 > H2O > NH3
  4. PI3 > PCl3 > PBr3
  5. SF4 > BrF3 > PCl5
Question 3 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

  1. Polypropylene, because of the presence of several chiral atoms is optically active.
  2. Gutta percha and natural rubber are stereoisomers.
  3. Intermolecular forces of attraction in nylons are dipole-dipole interactions.
  4. Vulcanization introduces hydrogen bondings between polymer chains.
  5. Dacron is a polyamide.
Question 4 Multiple Choice (Single Answer)

Match the list I with list II

 
List - I 
        </strong>|<strong>List - II</strong>|

|i. Indigoid dyes|a. Malachite green|
|ii. Azo dyes|b. Congo red|
|iii. Anthraquinone dyes|c. Indigo|
|iv. Triphenyl methane dyes|d. Martius yellow|
|v. Nitro dyes|e. Alizarin|

  1. i - a, ii - c, iii - d, iv - e, v - b
  2. i - d, ii - c, iii - a, iv - b, v - e
  3. i - c, ii - b, ii i -e, iv - a, v - d
  4. i - b, ii - a, iii - c, iv - e, v - d
  5. i - d, ii - c, iii - b, iv - e, v - a
Question 5 Multiple Choice (Single Answer)

Which of the following sets is of non -biodegradable insecticide?

  1. Dieldrin, Permethrin and Aldrin
  2. Aldrin, Dieldrin and BHC
  3. Parathion, Malathion and Methoxychlor
  4. Malathion, BHC and Methoxychlor
  5. DDT, BHC and Parathion
Question 6 Multiple Choice (Single Answer)

Which of the following statements is/are not false?
A. In column chromatography, the more highly absorbed component is eluted with less polar solvents.
B. Benzoic acid can be extracted from water using ethanol.
C. Number of replaceable hydroxyl ions present in one molecule of a base is called its acidity.

  1. Only A
  2. Only A and B
  3. Only B
  4. Only C
  5. Only B and C
Question 7 Multiple Choice (Single Answer)

Assertion: Benzaldehyde forms two oximes on reacting with NH2OH.
Reason: The two oximes arise due to geometrical isomerism around C = N bond.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is false, but R is true.
  4. A is true, but R is false.
  5. Both A and R are false.
Question 8 Multiple Choice (Single Answer)

Which of the following sets is are artificial sweeteners?

  1. Aspartame, Alitame, Cane syrup
  2. Dulcin, Sucrose, Saccharin
  3. Sucrose, Lactose, Honey
  4. Sucrose, Sucralose, DHC
  5. Aspartame, Sucralose, Alitame
Question 9 Multiple Choice (Single Answer)

Which of the following sets of molecules has all three types of bonds?

  1. S8, P4 and O3
  2. K3[Fe(CN)6], H3O+and [Cu(NH3)4]SO4
  3. CuSO4.5H2O, NH4Cl and K4[Fe(CN)6]
  4. NH3.BF3, KNH2 and AgNO3
  5. [Co(NH3)3Cl3], [Co(NH3)6]Cl3 and [Co(NH3)5Cl]Cl2
Question 10 Multiple Choice (Single Answer)

Which of the following sets have only hypervalent molecules/ions?

  1. PCl5, SF6 and SF4+2
  2. I3-, XeO4 and SF4
  3. BF3, AlCl3 and ICl2-
  4. XeF2, KrF2 and AlCl3
  5. XeOF2, XeO3 and I3+
Question 11 Multiple Choice (Single Answer)

Which of the reactions can not be used to distinguish allyl bromide from n-propyl bromide?

  1. Shaking with an aqueous solution of AgNO3.
  2. Boiling with aqueous KOH solution followed by acidification with dil. HNO3 and addition of AgNO3 solution.
  3. Fusion with sodium metal followed by acidification with dil. HNO3 and addition of AgNO3 solution.
  4. Both options 2 and 3
  5. All are correct
Question 12 Multiple Choice (Single Answer)

Which of the following statements about control of particular pollution is/are not correct?

  1. Gravity settling chamber removes larger particles from the air.
  2. Cyclone collector removes fine particles in the diameter range 5-20 micron.
  3. Wet scrubbers are used to wash away all types of particulates.
  4. Both 2 and 3
  5. In electrostatic precipitator, the particulates are made acquire positive change, which are then attracted by the negative electrode and removed.
Question 13 Multiple Choice (Single Answer)

Which of the following sets is of electron deficient molecules?

  1. IF7, F2-2 and XeF6
  2. XeOF4, XeO2F2 and ICl4-
  3. SF6, PCl5 and SnCl6
  4. BCl3, AlCl3 and PCl3
  5. B2H6, BeCl2 and BCl3
Question 14 Multiple Choice (Single Answer)

Under the certain conditions an alkyl halide reacts with base to give an alkene and HCl (elimination reaction) for example:
R-CH2-CH2-Cl → R-CH2=CH2 + HCl
The extent of these reactions depends on the structure of alkyl halides (e.g. primary, secondary or tertiary). The relative extent to which such reactions take place is in the order (of haloalkanes) _______________.

  1. Primary > secondary > tertiary
  2. Primary > secondary > tertiary
  3. Primary > secondary < tertiary
  4. Primary < secondary > tertiary<secondary></secondary>
  5. None of these
Question 15 Multiple Choice (Single Answer)

Which of the following statements is not true?

  1. The international standards of drinking water contain fluoride 1 ppm and Pb < 50 ppb.
  2. London smog is reducing in nature.
  3. To control CO emission by automobiles, catalytic convertors are fitted into the exhaust pipes.
  4. Oil slicks in sea water decreases D.O. values.
  5. Industrial flue gases are freed from NOx and SOx pollutants by scrubbing them with NaOH.
← Back to Quizzes