Which of the following statements is true about $Ca(OH{)}_2$
(a) it is used in the prreparation of bleacing powder
(b) It is a light blue solid
(c) It does nnot possess disinfectant property
(d) It is used in the manufacture fo cement

Q.

Study the following statements about ozone: ​

(a) It is essential for breathing of living organisms. ​

(b) It is used to disinfect water. ​

(c) It absorbs ultraviolet rays. ​

(d) Its proportion in air is about 3%. ​

Which of these statements are correct?

Q. a) It is also known as carboxylic acid.
b) It is used for detection of the antimicrobial assay.
c) It is can also be used as a disinfectant.
Which of the following chemical can be related to the above-given statements?

Q. Consider the following statements
(a) Baking soda is used in fire extinguishers
(b) Quick lime is used in the manufacture of glass
(c) Gypsum is used in the manufacture of cement
Which of the statements given above is/are correct?

Q. $X$ is used in the manufacture of $Y$ which is used as a disinfectant. What are $X$ and $Y$?

Q. What is true about natural gas?
a) Its main component is methane and is used as a fuel in motor cars.
b) It is used as the raw material for manufacturing of fertilizers.
c) It is used for the generation of electricity.
d) It is an inexhaustible natural source