1.Which of the following is correctly matched?
1. Emulsion ? Curd 2. Foam ? Mist
3. Aerosol ? Smoke 4. Solid sol ? Cake
2. Which method cannot be used for the purification of liquids?
1. Sublimation 2. Chromatorgraphy
3. Distillation 4. Fractional distillation
3. In modern surgery, metal pins are used for holding the broken bones together. These pins
are made up of
1. copper 2. stainless steel
3. aluminium 4. brass
4. Which of the following is not a pure substance?
1. Tin 2. Coal
3. Ice 4. Limestone
5. Which of the following solution does not show tyndall effect?
1. Soap solution 2. Starch solution
3. Solution of egg white in water 4. Copper sulphate solution
6. What will be the mass percentage of a solution containing 30 g of common salt in 220 g
water?
1. 12% 2. 22%
3. 1.2% 4. 3%