Question

Q-22 How the sex of a baby determined? Explain.
Q-23 what do you mean by herself fuel explain by giving examples ?
Q-24 What happens when a copper vessel is exposed to moist air?​

Answer 1

$\bold\pink{Question}$

Q-22 How the sex of a baby determined? Explain.

Q-23 what do you mean by herself fuel explain by giving examples ?

Q-24 What happens when a copper vessel is exposed to moist air?

$\huge\mathfrak\green{Answer\: 22}$

Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. An X chromosome combines with the mother's X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mother's to make a boy (XY).

$\mathfrak\green{Answer \: - \: 23}$

Fuel is defined as to give energy or power. An example of fuel is putting gas in your car.

combustible matter used to maintain fire, as coal, wood, oil, or gas, in order to create heat or power. something that gives nourishment; food. an energy source for engines, power plants, or reactors: Kerosene is used as jet engine fuel.

$\mathfrak\green{Answer - 24}$

Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide.

• vessel is exposed to moist air for a long time it develops a green layer on its surface.
• Copper corrodes by oxidation in which it reacts with oxygen in the air to form copper oxide.
• Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour .