11. In vulcanization, natural rubber is heated with:
(a) Carbon(b) Sulphur(c) Silicon(d) Phosphorous
11. In vulcanization, natural rubber is heated with: Read More »
10. Which of the following is used as filler in rubber tyres?
(a) Graphite(b) Carbon black(c) Coal(d) Coke
10. Which of the following is used as filler in rubber tyres? Read More »
9. Rayon is chemically:
(a) Amylose(b) Cellulose(c) Glucose(d) Pectin
9. Rayon is chemically: Read More »
8. ‘What are soaps?
(a) Sodium or potassium salts of heavier fatty acids(b) Salts of silicates(c) Sodium or potassium salts(d) Mixture of glycerol and alcohol
8. ‘What are soaps? Read More »
7. Which of the following is used for removing air bubbles from glass during its manufacture?
(a) Arsenious Oxide(b) Ammonium phosphate(c) Urea(d) Potassium carbonate
5. Which variety of glass is heat resisting?
(a) Pyrex glass(b) Hard glass(c) Flint glass(d) Bottle glass
5. Which variety of glass is heat resisting? Read More »
4. Detergents used for cleaning clothes and utensils contain:
(a) Nitrates(b) Sulphates(c) Sulphonates(d) Bismuthinites
4. Detergents used for cleaning clothes and utensils contain: Read More »
3. Which of the following fibres is least prone to fire?
(a) Rayon(b) Cotton(c) Nylon(d) None of these
3. Which of the following fibres is least prone to fire? Read More »
2. The first synthetic fibre made by man was:
(a) Rayon(b) Nylon(c) Polyester(d) None of these
2. The first synthetic fibre made by man was: Read More »