Explanation

Polythene bags are synthetic plastics that do not decompose naturally, taking hundreds of years to break down.

Unlike organic materials like feathers, paper, and wood, polythene bags contribute to environmental pollution.

Explanation

Number of moons in the planets:

Mercury: 0

Venus: 0

Earth: 1

Mars: 2

Jupiter: 95

Saturn: 146

Uranus: 27

Neptune: 14

Explanation

Core: Accounts for about 15% of Earth's total volume, composed mainly of iron and nickel alloys.

Mantle: Occupies 84% of Earth's volume.

Crust: Makes up 1% of Earth's volume.

Explanation

Chlorine is the gas used to disinfect and purify water.

It is passed through water to kill bacteria.

Explanation

In a compound microscope, the final image is typically virtual and inverted.

The objective lens forms a real, inverted image, which is then magnified by the eyepiece, resulting in a virtual and inverted image seen by the observer.

Explanation

The religious concept of health is the earliest, where health was often considered a divine gift or a state of moral and spiritual well-being.

Over time, this evolved into the biomedical and psycho-social concepts of health, which focus on physical and mental well-being, respectively.

Explanation

The production of ammonia in industry, specifically through the Haber process, can be increased by raising the pressure.

Higher pressure shifts the equilibrium towards more ammonia production, though temperature and catalysts also play a role.

Explanation

Raffinose is a trisaccharide, composed of galactose, glucose, and fructose.

Lactose is a disaccharide.

Fructose is a monosaccharide.

Explanation

When two resistances of 2Ω each are connected in parallel:

1/R = 1/R1 + 1/R2

= 1/2 + 1/2

= 2/2

= 1

R = 1Ω

Explanation

The elbow is a joint, while thumb, finger, and toe are all specific digits on the body.

Elbow refers to a part of the limb, not a digit like the others.