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Chemical Science Test - 2

GATE

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are true?
A. Benzene give isobutyl benzene when reacts with isobutyl chloride in presence of anhydrous AlCl3.
B. Bayer’s reagent can be used to differentiate cyclopropane from propene.
C. Ethyne and its derivatives give white precipitate when reacts with ammoniacal silver nitrate solution.

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

Which of the following sets is of antioxidants?

  1. Ascorbic acid, Citric acid and Ascisic acid
  2. BHA, Gallic acid and Lacithin
  3. Sodium benzoate, Sorbic acid and BHA
  4. Gallic acid, Lacithin and Abscisic acid
  5. BHA, BHT and Abscisic acid
Question 3 Multiple Choice (Single Answer)

Which of the following sets is of biodegradable insecticides?

  1. Cypermethrin, Aldrin and Methylparathion
  2. Cypermethrin, Permethrin and Methoxychlor
  3. Bifenthrin, Permethrin and dieldrin
  4. Malathion, Parathiona and Pyrethrin
  5. Parathion, Aldrin and Methylparathion
Question 4 Multiple Choice (Single Answer)

Which of the following statements about polar stratospheric clouds (PSCs) is/are false?

  1. Type I clouds are formed at about -77˚C and contain solid HNO3.3H2O.
  2. PSCs do not react with chlorine nitrate and HCl.
  3. A tight whirlpool of wind called polar vortex is formed which surrounds Antarctica.
  4. Type II clouds are formed at about -85˚C and contain some ice.
  5. None of these
Question 5 Multiple Choice (Single Answer)

Which of the following statements is/are not true?

  1. CrO4-- and MnO4-- have tetrahedral structure.
  2. FeSO4 gives sulphur dioxide on heating.
  3. Transition metals show catalytic properties and form interstitial compounds with noble gases.
  4. Silver is a better conductor of electricity than copper.
  5. Ni+2 compounds are thermodynamically more stable than Pt+2.
Question 6 Multiple Choice (Single Answer)

Which of the following statements is/are true about the reaction of p-methoxybenzaldehyde and formaldehyde in basic medium.
A. Formic acid is formed when formaldehyde is oxidised.
B. p-methoxybenzaldehyde is reduced to p-methoxybenzyl alcohol.
C. Formaldehyde is reduced while p-methoxybenzaldehyde is oxidised.

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

Match the column - I (Pollutant) with column - II (Source)

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

|i. Mineral Acids|a. Chemical fertiliser|
|ii. Polyphosphate|b. Domestic sewage|
|iii. Sediments|c. Abandoned coal mines|
|iv. Microorganism|d. Erosion of soil by strip mining|
|v. Plant nutrients|e. Detergents|

  1. i - e, ii - b, iii - c, iv - d, v - a
  2. i - a, ii - c, iii - d, iv - b, v - e
  3. i - d, ii - e, iii - c, iv - b, v - a
  4. i - c, ii - e, iii - d, iv - a, v - b
  5. i - c, ii - e, iii - d, iv - b, v - a
Question 8 Multiple Choice (Single Answer)

Which of the following sets is not of paramagnetic metal ions?

  1. Cr+2, Ti+3 and V+3
  2. Cu+2, Sc+3 and V+2
  3. Sc+3, Ti+4 and Zn+2
  4. Fe+2, Fe+3 and Co+2
  5. Ti+4, Ni+2 and Zn+2
Question 9 Multiple Choice (Single Answer)

Which of the following sets has tetrahedral shape molecular ions?

  1. C2H4, NO3- and CO3-2
  2. CH4, CCl4 and ICl2-
  3. SnCl4, NH4+ and SiBr4
  4. IF4+, SF4 and TeCl4
  5. I3+, I3- and H3O+
Question 10 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

  1. Each atom in hexagonal close packing has a coordination number 6.
  2. Solids may have tetrahedral or octahedral voids.
  3. The arrangement of atoms in fcc and bcc are the same.
  4. In a body centered cubic, the space occupied by spheres is 68%.
  5. Both 3 and 4.
Question 11 Multiple Choice (Single Answer)

Which one of the following is incorrectly matched?

  1. [Ag(NH3)2]+ and CO2 - Linear
  2. BF3 and CH3+ - Triangular planar
  3. NH3 and PCl3 - Pyramidal
  4. SF4 and CCl4 - Tetrahedral
  5. XeF4 and IF4 - Square planar
Question 12 Multiple Choice (Single Answer)

Which of the following statements regarding the 1, 3-butadiene is/are false?
A. The hybridisation of Carbon atom number 1 and 4 is sp2.
B. The single bond between carbon atom number 2 and 3 is of the same length as the C-C bond length in ethane.
C. 1, 3-butadiene is a conjugated diene.

  1. Only A
  2. Only B
  3. Only C
  4. Only B and C
  5. None of these
Question 13 Multiple Choice (Single Answer)

Which of the following statements is/are false about the internal energy?

  1. The absolute value of internal energy can not be determined.
  2. The internal energy of one mole of a substance is same at any temperature or pressure.
  3. The measurement of heat change during a reaction by bomb calorimeter is equal to the internal energy change.
  4. Internal energy is an extensive property.
  5. The internal energy of a system can be changed by heating the system or by doing work on it.
Question 14 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.
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. Only A and C
  5. Only B and C
Question 15 Multiple Choice (Single Answer)

Which of the following statements is/are not false?

  1. The solubility of α-Amino acid is minimum at isoelectric point.
  2. The blood platelets provides immunity against microorganisms.
  3. The bigger molecules are breaking down in smaller molecules during respiration.
  4. Cancer is a congenital disease.
  5. Denaturation involves changes in the primary structure of proteins.
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