Milk is a
A). Mixture
B). Element
C). Metal
D). None of these
2. The material known in commerce as Terylene is a
3. When formaldehyde and potassium hydroxide are heated we get
4. Terylene is a condensation polymer of ethylene glycol and which acid?
5. The common name of sodium tetraborate decahydrate is _____.
6. The greenhouse effect is caused by the higher level of which gas in the atmosphere
7. Which type of radiations are absorbed by the upper layer of the atmosphere?
8. White phosphorus is always kept under
9. Hardness of the water is commonly measured in terms of
10. Smog is