21. Glass is made of the mixture of:
(a) Quartz and mica(b) Sand and salt(c) Sand and silicates(d) None of these
21. Glass is made of the mixture of: Read More »
20. The major ingredient of leather is:
(a) Collagen(b) Polymer(c) Nucleic acid(d) None of these
20. The major ingredient of leather is: Read More »
19. The type of glass used in making lenses and prisms is:
(a) Soft glass(b) Flint glass(c) Pyrex glass(d) Jena glass
19. The type of glass used in making lenses and prisms is: Read More »
18. Which of the following is a protein?
(a) Wool(b) Natural rubber(c) Starch(d) Cellulose
18. Which of the following is a protein? Read More »
17. The combustible material at the tip of a safety match stick is:
(a) Sulphur(b) Antimony sulphide(c) Manganese oxide(d) None of these
17. The combustible material at the tip of a safety match stick is: Read More »
16. In laundry soaps,a material called filler is used;which of the following is filler?
(a) Talc(b) Soda ash(c) Sodium silicate(d) None of these
16. In laundry soaps,a material called filler is used;which of the following is filler? Read More »
15. Deep blue colour is imparted to glass by the presence of:
(a) Iron oxide(b) Cobalt oxide(c) Cupric oxide(d) None of these
15. Deep blue colour is imparted to glass by the presence of: Read More »
14. The vast resources of unutilised natural gas can be used in the production of:
(a) Graphite(b) Fertiliser(c) Carbide(d) Synthetic petroleum
14. The vast resources of unutilised natural gas can be used in the production of: Read More »
13. Paper is manufactured by:
(a) Wood,calcium,hydrogen sulphite and resin(b) Wood and resin(c) Wood and bleaching powder(d) None of these
13. Paper is manufactured by: Read More »
12. Which is the important raw material required in cement industry?
(a) Limestone(b) Limestone and clay(c) Clay(d) Gypsum
12. Which is the important raw material required in cement industry? Read More »