Question

A. Choose the correct option.
Which of the following protects our skin from harmful sunrays?
1.
b.
Moisturizer
Talcum powder
d.
2.
Sunscreen
Neem
Who developed the atomic theory of matter?
Robert Boyle
C.
Antoine Lavoisier
b. John Dalton
d. Sir Humphry Davy
11. Which
3.
b. sodium carbonate and silica
d. calcium sulphate and salts
Which of the following is manufactured by heating a mixture of gypsum,
Soaps are made up of:
limestone and soda
sodium and potassium salts
a.
C.
12. Par
4.
a
13
a.
C.
limestone and clay in a rotary kiln?
Cement
b. Glass
Plaster of Paris
d. Plastics
Which of the following is used in soda lime-glass?
Calcium sulphate and salts
Sodium carbonate and silica
5.
b. Limestone and soda
14
a.
d. Sodium and potassium salts
C.​

Answer 1

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