A pure substance is a substance
Important Questions on Separation of Substances
Which of these are not mixtures?
i) air ii) salt iii) sugar iv) seawater.
In a homogeneous mixture, the _____
(i) components cannot be seen separately
(ii) components can be seen separately
(iii) components cannot be separated
(iv) components can be separated
A mixture of sand and iron filings is best separated by _____.
A mixture of chalk and common salt in water can be separated by
A mixture of sand, water and mustard oil can be separated by
Oil and water can be separated using _____.
Which of the statements are true?
(i) The solubility of sugar in water is higher than the solubility of salt in water.
(ii) The solubility of salt in water is higher than the solubility of sugar in water.
(iii) The solubility of sugar in water increases with rise in temperature, whereas that of salt increases very little with rise in temperature.
(iv) The solubility of both sugar and salt increase at approximately the same rate with increase in temperature.
