Explanation

Photo resistors  are light sensitive variable resistors 

فوٹو ریزسٹرز روشنی کے حساس متغیر ریزسٹرس ہیں۔

Explanation

Sodium Bicarbonate is the monosodium salt of carbonic acid with alkalinizing and electrolyte replacement properties

Explanation

Stationary waves do not carry energy with them as it is stationary or does not change position.

Stationary waves do not transfer energy from one place to another. 

Explanation

Uranus is four times the size of the Earth.

Uranus appears greenish in color because of the large amount of methane gas present in its atmosphere.

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Explanation

Epidemiology, the study of epidemics, is sometimes defined as the medical aspect of ecology, for it is the study of diseases in animal populations. 

Explanation

All people living today belong to the species Homo sapiens

Explanation

The report follows the International Energy Agency's (IEA) conclusion in its World Energy Outlook 2020 that solar power is now the cheapest electricity in history.

Explanation

Every living thing is made up mostly of water. Water is the most abundant substance in living organisms, making up approximately:

- 55-60% of an adult human's body weight

- 70-80% of a plant's weight

- 70-90% of an animal's weight

Water is essential for many biological processes, including:

- Regulating body temperature

- Transporting nutrients and oxygen

- Removing waste products

- Maintaining cell shape and structure

Water is truly the foundation of life!

Explanation

Explanation

The incorrect statement is "sigma bond is weaker than a pi bond" because a sigma bond is stronger than a pi bond.

Sigma bond: Formed by direct head-on overlap of orbitals, resulting in a strong bond. 

Pi bond: Formed by sideways overlap of p orbitals, resulting in a weaker bond compared to a sigma bond.