Higher Chemistry Section 1 2017  Mcqs with answers 


1. Which of the following bonds is the least polar?

  • A C — I
  • B C — F
  • C C — Cl
  • D C — Br

Ans : A

2. Which of the following compounds would be the most water soluble?

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3. Which of the following atoms has the greatest attraction for bonding electrons?

  • A Sulfur
  • B Silicon
  • C Nitrogen
  • D Hydrogen

Ans C

4. Which type of structure is found in phosphorus?

 

  • A Covalent network
  • B Covalent molecular
  • C Monatomic
  • D Metallic lattice

Ans C

5. The polarity of molecules can be investigated using a charged rod. The charged rod will
attract a stream of polar liquid flowing from a burette.

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Which of the following liquids would not be attracted?

  • A Water
  • B Propanone
  • C Propanol
  • D Hexane

Ans D

6. xP2H4 + yO2 ↓ P4O10 + zH2O

The equation is balanced when

  • A x = 1, y = 5, z = 4
  • B x = 4, y = 6, z = 2
  • C x = 2, y = 7, z = 4
  • D x = 2, y = 5, z = 2

Ans C

7. What is the systematic name for the compound below?

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  • A 2,2,2-trimethylethanol
  • B 2,2-dimethylpropan-1-ol
  • C 2,2-dimethylpropan-3-ol
  • D 2,2-dimethylpentan-1-ol

Ans B

8. Which of the following fatty acids is the most unsaturated?

  • A C15H29COOH
  • B C15H31COOH
  • C C17H31COOH
  • D C17H35COOH

Ans C

9. Which of the following is not a step in a free radical chain reaction?

  • A Activation
  • B Initiation
  • C Propagation
  • D Termination

Ans A

10. Which of the following is an isomer of ethyl propanoate (CH3CH2COOCH2CH3)?

  • A Methyl propanoate
  • B Pentan-2-one
  • C Pentanoic acid
  • D Pentane-1,2-diol

Ans C 

11. Essential oils are

  • A non-water soluble, non-volatile compounds
  • B non-water soluble, volatile compounds
  • C water soluble, non-volatile compounds
  • D water soluble, volatile compounds.

Ans B

12. The enthalpy of combustion of a hydrocarbon is the enthalpy change when

  • A one mole of a hydrocarbon burns to give one mole of water
  • B one mole of a hydrocarbon burns to give one mole of carbon dioxide
  • C one mole of a hydrocarbon burns completely in oxygen
  • D one mole of a hydrocarbon burns in one mole of oxygen.

Ans C

13. Which of the following is the strongest reducing agent?

  • A Fluorine
  • B Lithium
  • C Calcium
  • D Iodine

Ans B

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17. Chemical reactions are in a state of dynamic equilibrium only when

  • A the reaction involves no enthalpy change
  • B the concentrations of reactants and products are equal
  • C the activation energies of the forward and backward reactions are equal
  • D the rate of the forward reaction equals that of the backward reaction.

Ans D

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chemistry past papers

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