To enable water to conduct electricity ____ is added during electrolysis of water.

Correct! Wrong!

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Ethanol, urea and glucose are poor conductors of electricity. Dil. sulphuric acid or common salt is added to enable water to conduct electricity.

Sulphur is soluble in ____.

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Carbon disulphide is an inorganic solvent and sulphur is soluble in it.

Which among the following is a mixture of two elements?

Correct! Wrong!

Sulphur powder and iron filings are elements. Sugar, common salt and water are compounds. Milk is a colloid and air is a mixture.

When Non-metal oxide is dissolved in water, The resulting solution will be ____.

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When Oxide of Non-metal is dissolved in water, the resulting solution will be Acidic.

Who confirmed formulae of water is H2O?

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Sir Davy Confirmed formula of water is H2O.

Heterogeneous mixture can be separated by ____.

Correct! Wrong!

A heterogeneous mixture contains physically distinct parts and has non-uniform composition. Hence, hand picking, sieving and filtration methods can be used to separate the heterogeneous mixtures.

When potassium treated with water ____ and ____ bare formed.

Correct! Wrong!

2 K + 2 H2O →2 KOH + H2

Which of the following solutions exhibit Tyndall effect?

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Tyndall effect is shown by colloids. Starch solution is a colloid.

In an unsaturated solution more solute can be dissolved without increasing the amount of the solvent.

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An unsaturated solution is a solution in which some more solute can be dissolved in the given solvent at a given temperature.

Suspension is a ____ solution.

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In a suspension, the particles can be seen through the naked eye. Hence, it is heterogeneous.

____ prepared water in the laboratory for first time by combining , Two parts of hydrogen and one part of oxygen.

Correct! Wrong!

In 1781, Henry Cavendish became the first to confirm from his studies that water is not an element, But a compound made up of Hydrogen and Oxygen. He Prepared water for first time in the laboratory nby combining 2 parts of hydrogen and 1 part of oxygen.

In aerosol, dispersed phase is gas and dispersion medium is solid.

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Aerosol is a colloid in which dispersion medium is air and dispersed phase is solid or liquid.

The process of decomposing water into its constituent elements is called ____.

Correct! Wrong!

The process of decomposing water into its constituent elements is called Electrolysis of water. 2 H2O →2H2 + O2

Freezing point and boiling point of water changes, with the change in ____.

Correct! Wrong!

Boiling and freezing point of water are changes with change in: 1. Pressure 2. Temperature 3. Added impurities

A student is asked to mix sugar in water and stir well. The student observed that ____.

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Sugar in water forms a transparent solution. This is a true solution.

Tincture of iodine is a ____.

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Tincture of iodine is a solution of iodine in ethyl alcohol.

Which characteristic among the following is not the property of a true solution?

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A true solution is never translucent. Colloids are translucent.

The component of a solution which is present in large amount is referred to as ____.

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Solvent is always present in a greater amount in a solution.

The particles in a suspension ____.

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The particles of solute settle down at the bottom in a suspension. This is called sedimentation.

Hydrogen and oxygen combine in ____ ratio by volume and ____ ratio by weight to fom water.

Correct! Wrong!

Hydrogen and oxygen combine in 2:1 ratio by volume an 1:8 ratio by weight to fom water.

A homogeneous mixture of two or more substances is a ____.

Correct! Wrong!

A homogeneous mixture of two or more substances is a solution. In a solution, solute cannot be seen even with a microscope as it is completely dissolved in the solvent and the solution is uniform.

Water is a ____.

Correct! Wrong!

Water is Polar covalent compound with dielectric constant 80 at 293K.

Sedimentation does not take place in a mixture of ____ and water.

Correct! Wrong!

Sedimentation does not take place in a mixture of albumin and water. Albumin in water forms a colloid. Sedimentation does not take place in colloids.

Milk is an example of a ____.

Correct! Wrong!

Milk is a colloid of liquid fat dispersed in water.

Which of the following is an incorrect statement about water?

Correct! Wrong!

Water is a poor conductor of electricity. To enable the conductivity of water dil. sulphuric acid is added.

ICSE Class 9th Chemistry 3 - Water MCQs
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