ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Write the missing reactants and products and balance the equations.

NaOH + ............... `→` NaCI + ...................

Write the missing reactants and products and balance the equations.

\[\ce{KClO3 ->[heat]}\] ___________+ ____________

Write the missing reactants and products and balance the equations.

................+ HCI `→` NaCI + `"H"_2"O"` + .........................

What do you observe when Iron nail is kept in copper sulphate solution for sometime.

Give reason .

A person suffering from acidity is advised to take an antacid.

Give reason.

Acidic soil is treated with quick lime.

Give a reason.

Wasp sting is treated with vinegar.

What are oxides ? 

What do you observe when an acid is added to a basic solution.

MULTIPLE CHOICE QUESTIONS

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 Which one of the following alters the rate of the chemical reaction without itself undergoing any change?

1. temperature and Pressure
2. concentration of reactants
3. presence of catalyst
4. none of these

MULTIPLE CHOICE QUESTIONS

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Reduction reaction is the exact opposite of

1. displacement reaction
2. decomposition reaction
3. oxidation reaction
4. none of these

MULTIPLE CHOICE QUESTIONS

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Which of the following is a reducing agent?

1. oxygen
2. chlorine
3. hydrogen
4. none of these

MULTIPLE CHOICE QUESTIONS

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Reduction is a chemical reaction in which there is

1. removal of hydrogen
2. removal of oxygen
3. addition of oxygen
4. none of these

MULTIPLE CHOICE QUESTIONS

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Compounds, which in their molten state allow an electric current to pass through them are called

1. electrolytes
2. non-electrolytes
3. non-conductors
4. none of these

MULTIPLE CHOICE QUESTIONS

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Miscible liquids having slightly different boiling points can be separated by the

1. evaporation
2. distillation
3. fractional distillation
4. sedimentation

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A .............. change is a temporary change.

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In a double decomposition precipitation reaction both the reactants must be ............ soluble.

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In a .............reaction, an acid reacts with a base to form salt and water as the only products.

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On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.

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........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.