Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

The simplest way to check whether a system is colloidal is by

  • electrodialysis

  • finding out particle size

  • Tyndall effect

  • Brownian movement


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32.

An example for a strong electrolyte is

  • urea

  • ammonium hydroxide

  • sugar

  • sodium acetate


D.

sodium acetate

An example for a strong electrolyte is of sodium acetate.


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33.

Sodium chloride is an ionic compound where as hydrogen chloride gas is mainly covalent because

  • electronegativity difference in the case of hydrogen is less than 2.1

  • hydrogen chloride is a gas

  • hydrogen is a non-metal

  • sodium is reactive


34.

Iron loses magnetic property at

  • melting point

  • 1000 K

  • Curie point

  • boiling point


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35.

An example for a double salt is

  • potassium ferricyanide

  • cobalt hexamine chloride

  • cuprous sulphate

  • Mohr's salt


36.

The set of compounds in which the reactivity of halogen atom in the ascending order is

  • vinyl chloride, chloroethane, chlorobenzene

  • vinyl chloride, chlorobenzene, chloroethane

  • chloroethane, chlorobenzene, vinyl chloride

  • chlorobenzene, vinyl chloride, chloroethane


37.

In the case of auto catalysis

  • product catalysis

  • solvent catalysis

  • reactant catalysis

  • heat produced in the reaction catalysis


38.

Order of reaction is decided by

  • molecularity

  • pressure

  • temperature

  • mechanism of reaction as well as relative concentration of reactants


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39.

Half-life of a reaction is found to be inversely proportional to the cube of initial concentration. The order of reaction is

  • 5

  • 2

  • 4

  • 3


40.

Which among the following statements is false?

  • The adsorption may be monolayered or multilayered

  • Particle size of adsorbent will not affect the amount of adsorption

  • Increase of pressure increases amount of adsorption

  • Increase of temperature may decrease the amount of adsorption


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