Chemistry Fill in the blanks Set 15

Chemistry Fill in the blanks Set 15

1. The basic raw materials used in the manufacture of cement are ______, ______ and ______.
Ans: Clay, Limestone, Gypsum
 
2. The expansion of P.V.C is__________
Ans: Polyviny chloride
 
3. ________ is used to make fireproof clothes.
Ans: Melamine
 
4. The process of slow and steady cooling of glass is called ______
Ans: annealing
 
5. The fibre obtained from the stem of the plant is _____
Ans: jute
 
6. The chemical substances present in the cotton fibre is____
Ans: cellulose
 
7. The ink and chalk piece are _______ substances.
Ans: chemical
 
8. ________ is used to build roof, pillars, bridges and dams.
Ans: Concrete
 
9. Plastic which melts on heating and can be remoulded is known as _______
Ans: Thermoplastic
 
10. Plastic which gets hardened on heating and cannot be melted and remoulded again is termed as _________ plastic.
Ans: Thermosetting