Question

Q7 A)How do metals react with acids? Explain with an example?
B) Write uses of non-metals (any three). (2+3=5M)​

Answer 1

Explanation:

Q. 1. How do metals react with acids? Explain with an example?

Q. 2. Write uses of non-metals (any three) ?

Ans :- 1. When a metal reacts with an acid, it generally displaces hydrogen from the acids. This leads to the evolution of hydrogen gas. The metals combine with remaining part of acids to form a salt. For example reaction of sulphuric acid with zinc.

2. Ans :-

1.Oxygen is used for breathing.

2. Chlorine is used for purifying water.

3. Phosphorous is used in crackers.

hope it's help

Answer 2

Explanation:

The three methods of increasing friction are: 1.) By applying more force to the object, 2.) By increasing the mass of the object that is causing friction, and 3.) By creating a rougher point of contact.