Chemistry in Everyday Life

What is the chemical composition of a soda-acid type fire extinguisher?

'German silver' is used to make decorative articles, coinage metal, ornaments etc. Why is it named so?

Which one among the following metals is prominently used in mobile phone batteries?

Which one among the following is used in making lead pencils?

Which one among the following fuels is used in gas welding?

Heavy water is called heavy because:

Food cans are coated with tin but not with zinc because _____.

Which one of the following is used for manufacturing safety matches?

Consider the following statements :
(i) Washing soda on strong heating gives sodium oxide and carbon dioxide.
(ii) Plaster of Paris is obtained by heating gypsum at $373$K.
(iii) Bleaching powder is used for disinfecting drinking water.
Which of these statements(s) is/are correct?

Why is ethylene dibromide added to petrol?
$1.$ It increases the octane number of fuel. 
$2.$ It helps in the elimination of lead oxide.
$3.$ It removes the sulfur compound in petrol.
$4.$ It serves as a substitute for tetraethyl lead.

Select the correct answer using the codes given below.

Which of the following can be used for removal of stains of rust on clothes?
$1.$ $H_2{O}_2$
$2.$ Oxalic acid
$3.$ Petrol
$4.$ Alcohol

What happened when a hard-boiled egg after shelling is immersed in saturated brine?

Consider the following statements: Hard water is not suitable for:
1. Drinking
2. Washing clothes with soap
3. Use in boilers
4. Irrigating crops
Which of these statements are correct?

Consider the following statements and select the correct code.
Assertion (A): The main constituent of liquefied petroleum gas is methane.
Reason (R): Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

Soap helps in cleaning of clothes because _____.

Which among the following is the correct chemical formula of baking soda?

Washing soda is represented by which of the following chemical formula?

Which one of the following is NOT true for bleaching powder?

Match List-I with List-II and select the correct answer from the codes given below:

Which one among the following is not a mixture?