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Chemical Science Test - 6

GATE Chemistry Practice Test covering organic, inorganic, physical chemistry, and environmental science

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is not correct regarding the treatment of sewage?

  1. Pretreatment may include a sand or grit channel or chamber, where the velocity of the incoming sewage is adjusted to allow the settlement of sand, grit, stones and broken glass.
  2. Coagulation can be carried out by passing ozone through waste water.
  3. In primary treatment, large sized particles are filtered through screens and residual water is subjected to sedimentation.
  4. Secondary treatment involves aerobic digestion of the organic waste.
  5. In tertiary treatment, the waste water is treated with lime to remove phosphate followed by coagulation.
Question 2 Multiple Choice (Single Answer)

Which one of the following sets of alloys listed below contains chromium?

  1. Duralumin, magnalium, bell metal
  2. Invar, babbit metal, monel metal
  3. White metal, type metal, gun metal
  4. Nichrome wire, stainless steel, inconel
  5. Solder, wood metal, electron
Question 3 Multiple Choice (Single Answer)

Which one of the following sets comprises of antioxidants?

  1. Abscisic acid, BHA, BHT
  2. Gallic acid, lacithin, abscisic acid
  3. Sodium benzoate, sorbic acid, BHA
  4. BHA, gallic acid, lacithin
  5. Ascorbic acid, citric acid, ascisic acid
Question 4 Multiple Choice (Single Answer)

Which of the following statements is not correct?

  1. When ethyne reacts with chlorido(methyl)magnesium, hydrogen is evolved.
  2. OCOCH3 is an ortho-, para- directing group but –COOCH3 is a meta-directing group.
  3. Lindlar catalyst is a heterogeneous catalyst that consists of palladium deposited on calcium carbonate or barium sulfate and treated with various forms of lead.
  1. Only 1
  2. Only 2
  3. Only 3
  4. 2 and 3
  5. 1 and 2
Question 5 Multiple Choice (Single Answer)

Which one of the following sets of metal atoms exhibits the maximum possible oxidation state?

  1. Ta, Nb, V
  2. Cr, Fe, Pt
  3. Ir, Mo, Rh
  4. Tc, W, Re
  5. No, Md, Es
Question 6 Multiple Choice (Single Answer)

Which of the following is not a consequence of green house effect?

  1. Climate conditions will be changed, resulting in global warming.
  2. The incident of infectious diseases is likely to increase.
  3. In the Solar System, Mars, Venus, and the Moon Titan also exhibit greenhouse effects.
  4. Plants in warmer climates with adequate rainfall would grow faster.
  5. Malaria will be controlled as mosquitoes will not survive.
Question 7 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. In electrostatic precipitator, the particulates acquire positive change, they are then attracted by the negative electrodes and removed.
  3. Cyclone collector removes fine particles in the diameter range 5-20 micron.
  4. Wet scrubbers are used to wash away all types of particulates.
  1. 1 and 2
  2. 1 and 3
  3. 2 only
  4. 4 only
  5. 2 and 4
Question 8 Multiple Choice (Single Answer)

Assertion: When white light falls on a substance, it absorbs a particular colour in the visible region.
Reason: The colour of the absorbed light is the colour of the substance.

Directions: In each of the questions given below, there are two statements labeled as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
E. Both A and R are false.

  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 true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 9 Multiple Choice (Single Answer)

Which one of the following sets of molecules has all three types of bonds i.e, electrovalent, covalent and coordinate bonds?

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

Which one of the following pairs of transition metal complexes has the maximum magnetic moment?

  1. [Fe(CN)6]-4 and [Fe(CN)6]-3
  2. [Co(NCS)6]+3 and [Fe(NCS)6]+2
  3. [Zn(H2O)6]+2 and [Ni(Br)4]-2
  4. [Ni(CN)4]-2 and Co(NH3)6]+2
  5. [Cr(NH3)6]+3 and [Co(NH3)6]+3
Question 11 Multiple Choice (Single Answer)

Which of the following statements is/are true?
A. C6H5COOH can be extracted from water using C2H5OH.
B. In column chromatography, the more highly absorbed component is eluted with less polar solvents.
C. Number of replaceable OH- ions present in one molecule of a base is called its acidity.

  1. Only A
  2. Only B
  3. Only C
  4. A and B
  5. B and C
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are true?
A. 1-chloro-2, 3-pentadiene has no chiral carbon atoms, yet it is a chiral molecule.
B. A newly discovered compound is thought to be chiral, but shows no rotation in a specific solvent. Hence, the compound is assuredly achiral.
C. When a chiral molecule reacts to give a chiral molecule, the product is always racemic.

  1. Only A
  2. Only B
  3. Only C
  4. Both A and C
  5. Both B and C
Question 13 Multiple Choice (Single Answer)

Match the List I (metal alloys) with List II (their uses):

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

|i. Tungsten steel|a. Clock pendulums|
|ii. Manganese steel|b. Cutlery|
|iii. Chrome steel|c. Cables|
|iv. Nickel steel|d. Springs|
|v. Invar|e. Rail road tracks|
| |f. Permanent magnet|

  1. i - d, ii - e, iii - b, iv - c, v - a
  2. i - b, ii - c, iii - a, iv - e, v - d
  3. i - a, ii - b, iii - e, iv - d, v - c
  4. i - f, ii - b, iii - d, iv - e, v - a
  5. i - e, ii - f, iii - c, iv - d, v - b
Question 14 Multiple Choice (Single Answer)

Match the column I with column II.

 
Column I Column II
A. Artificial camphor 1. CCl3NO2
B. Westron 2. CF3CHClBr
C. Chloropicrin 3. C2Cl4
D. Halothane 4. C2H2Cl4
E. Westrosol 5. C2Cl6
  1. D - 5, E - 4, A - 1, B - 2, C - 3
  2. A - 5, B - 4, C - 1, D - 2, E - 3
  3. E - 5, A - 4, B - 1, C - 2, E - 3
  4. C - 5, D - 4, E - 1, A - 2, B - 3
  5. B - 5, C - 4, D - 1, E - 2, A - 3
Question 15 Multiple Choice (Single Answer)

Assertion: Both cyclopropane and propene gives addition reactions readily.
Reason: Cyclopropane and propene are isomers of each other.

Directions: In each of the questions given below, there are two statements labeled as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
E. Both A and R are false.

  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 true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
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