
Rajiv dropped a silver and a gold coin each in a jar of water.
The picture below shows what happened.

Which question can be answered from the activity?



Important Questions on Sorting Materials into Groups
The picture shows two hollow pipes. One pipe is made of copper and the other is made of plastic.
Which of the following will help to identify the pipe made of copper?







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.
