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Factors Affecting Hydrogen Bonding

One of the re...

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One of the reasons that CuSO4 dissolves in water

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Q. Assertion :Heat of solution is positive when

{N a}_{2} {S O}_{4} \cdot 10 H_{2} O

is dissolved in water but it is negative when anhydrous

C u {S O}_{4}

is dissolved in water. Reason: Molar masses of

{N a}_{2} {S O}_{4} \cdot 10 H_{2} O

C u {S O}_{4}

C u S O_{4}

dissolved in water to make the above solution is :

Q. When sugar dissolves in water, it disappears. That means it must have changed into a new substance. Therefore, dissolving is a chemical change. Do you agree? Give reasons.

Q. Which one of the following is a correct statement?
(a) The amount of a solid that dissolves in water increases with a rise in temperature.
(b) The amount of a solid that dissolves in water at different temperatures is the same.
(c) The amount of different solutes that dissolve in water is always the same.
(d) The amount of a solute that dissolves in water decreases with a rise in temperature.

Q. Is water that is completely free of all solid and dissolved impurities necessarily potable? Give reasons.

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Factors Affecting Hydrogen Bonding

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