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Chemistry (Class XI / XII)

Engineering entrance

10 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

When n-hexane is heated with anhydrous AlCl3 and HCl gas the major products formed are __________.

  1. 1-chlorohexane
  2. 2-chlorohexane
  3. 3-chlorohexane
  4. Mixture of 2-methylpentane and 3-methylpentane
  5. None of these
Question 2 Multiple Choice (Single Answer)

Considering Sc(III), Ti(IV), Pd(II) and Cu(II) ions, which of the following options is correct?

  1. All are paramagnetic.
  2. All are diamagnetic.
  3. Sc(III) and Ti(IV) are paramagnetic and Pd(II) and Cu(II) are diamagnetic.
  4. Sc(III) and Ti(IV) are diamagnetic while Pd(II) and Cu(II) are paramagnetic.
  5. None of these
Question 3 Multiple Choice (Single Answer)

Which of the following statements is/are incorrect?

1. Vapour pressure of liquid is the measure of the strength of intermolecular attractive force.
2. Surface tension of liquid acts perpendicular to the surface of liquid.
3. Vapour pressure of all the liquids is the same at their freezing point.

  1. All of the above
  2. Only 1 and 2
  3. Only 3
  4. Only 1 and 3
  5. None of these
Question 4 Multiple Choice (Single Answer)

Which of the following compounds reacts with tollen reagent and forms silver minor and cannot participate in aldol condensation?

  1. 3-pentanone
  2. 2, 2 dimethylpropanal
  3. 3, hydroxyl, 2-pentene
  4. Options 1 and 3 are correct
  5. None of these
Question 5 Multiple Choice (Single Answer)

An emulsion is formed when ____________.

  1. A gas is dispersed in a liquid
  2. A gas is dispersed in a solid
  3. A liquid is dispersed in a gas
  4. A liquid is dispersed in the liquid
  5. None of these
Question 6 Multiple Choice (Single Answer)

Which of the following compounds combine to prepare lachrymator (tear gas)?

  1. Acetophenone and chlorine
  2. Benzaldehydes and chlorine
  3. Benzaldehydes and acetophenone
  4. Acetophenone and acetophenone
  5. None of these
Question 7 Multiple Choice (Single Answer)

When a non volatile substance is dissolved in solvent, the vapour pressure of the solvent decreases. This results in ____________.

  1. an increase in boiling point of the solvent
  2. a decrease in the boiling point of solvent
  3. the solution will have a higher freezing point than the solvent
  4. the solution will have lower osmotic pressure than the solvent
  5. none of these
Question 8 Multiple Choice (Single Answer)

Schiff’s base is formed by the condensation of _____________.

  1. benzaldehydes and aniline
  2. benzene diazonium chloride
  3. aniline and phosgene
  4. aniline and benzoyl chloride
  5. none of these
Question 9 Multiple Choice (Single Answer)

Which of the following compounds are aromatic, non-aromatic and anti-aromatic respectively.
(1) cyclopentadienyl cation
(2) cyclopropenyl anion
(3) cyclooctatetraene
(4) benzene
Choose the correct order.

  1. (4), (1), (2)
  2. (4), (3), (2)
  3. (1), (2), (3)
  4. (2), (1), (3)
  5. None of the options is correct
Question 10 Multiple Choice (Single Answer)

Chloroform reacts with conc nitric acid to form ____________.

  1. chloropicrin
  2. chloretone
  3. westron
  4. westrosol
  5. none of these
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