Alum stops bleeding in minor cuts because of
1). salvation
2). emulsion
3). dialysis
4). coagulation
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1. Formation of ozone hole is maximum over
2. What is the element required for solar energy conversion ?
3. The function of skimming tank in sewage treatment is to remove
4. Sea water can be purified by the process of
5. Which of the following is used to increase the antiknocking property of petrol
6. Which of the following metals form an amalgam with other metals ?
7. Normal rainwater has a pH level of
8. Which one of the following is most electronegative?
9. The substance that is added to make natural rubber strong and more bouncy is