Freezing point and boiling point of water changes, with the change in ____.
Boiling and freezing point of water changes with change in: 1. Pressure 2. Temperature 3. Added impurities
Hydrogen and oxygen combine in ____ ratio by volume and ____ ratio by weight to form water.
Hydrogen and oxygen combine in 2:1 ratio by volume an 1:8 ratio by weight to form water.
Sedimentation does not take place in a mixture of ____ and water.
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.
In an unsaturated solution more solute can be dissolved without increasing the amount of the solvent.
An unsaturated solution is a solution in which some more solute can be dissolved in the given solvent at a given temperature.
In which of the following, Tyndall effect is not observed?
Salt solution is a true solution. Colloids only show Tyndall effect. True solutions do not exhibit Tyndall effect.
The process of decomposing water into its constituent elements is called ____.
The process of decomposing water into its constituent elements is called Electrolysis of water.
A homogeneous mixture of two or more substances is a ____.
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.
The component of a solution which is present in large amount is referred to as ____.
Solvent is always present in a greater amount in a solution.
____ prepared water in the laboratory for first time by combining , Two parts of hydrogen and one part of oxygen.
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 by combining 2 parts of hydrogen and 1 part of oxygen.
When potassium treated with water ____ and ____ bare formed.
Caustic potash and Hydrogen
When Non-metal oxide is dissolved in water, the resulting solution will be ____.
When Oxide of Non-metal is dissolved in water, the resulting solution will be Acidic.
Suspension is a ____ solution.
In a suspension, the particles can be seen through the naked eye. Hence, it is heterogeneous.
Which characteristic among the following is not the property of a true solution?
A true solution is never translucent. Colloids are translucent.
Tooth enamel contains ____.
Tooth enamel contains calcium phosphate.
Tincture of iodine is a ____.
Tincture of iodine is a solution of iodine in ethyl alcohol.
Milk is an example of a ____.
Milk is a colloid of liquid fat dispersed in water.
Which among the following is a mixture of two elements?
Sulphur powder and iron filings are elements. Sugar, common salt and water are compounds. Milk is a colloid and air is a mixture.
Heterogeneous mixture can be separated by ____.
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.
Which of the following is an incorrect statement about water?
Water is a poor conductor of electricity. To enable the conductivity of water dil.sulphuric acid is added.
Which of the following solutions exhibit Tyndall effect?
Tyndall effect is shown by colloids. Starch solution is a colloid.
In aerosol, dispersed phase is gas and dispersion medium is solid.
Aerosol is a colloid in which dispersion medium is air and dispersed phase is solid or liquid.
Which acid is present in baking powder?
Tartaric acid is present in baking powder. Tartaric acid is one of the components of baking powder along with sodium hydrogen carbonate.
Epsom salt has 10 water molecules.
Epsom salt has 7 water molecules
Water is a ____ .
Water is Polar covalent compound with dielectric constant 80 at 293K.
Sulphur is soluble in ____.
Carbon disulphide is an inorganic solvent and sulphur is soluble in it.
To enable water to conduct electricity ____ is added during electrolysis of water.
Ethanol , urea and glucose are poor conductors of electricity. Dil.sulphuric acid or common salt is added to enable water to conduct electricity.
The particles in a suspension ____.
The particles of solute settle down at the bottom in a suspension. This is called sedimentation.
A student is asked to mix sugar in water and stir well. The student observed that ____.
Sugar in water forms a transparent solution. This is a true solution.
____ is used as raw material in the preparation of plaster of Paris.
Gypsum is used as raw material in the preparation of plaster of Paris. Gypsum when heated to 120°C loses a part of its water of crystallization and forms a white powder known as plaster of Paris.
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