Explanation

The correct proverb is: "Prosperity finds friends, adversity tries them."

It means in good times, many will be your friend, but hard times test who truly is.

Explanation

The coefficient of variation (CV) is defined as:

(Standard Deviation / Mean) × 100

This formula expresses the standard deviation as a percentage of the mean.

Explanation

Deductive reasoning: General to specific.

Inductive reasoning: Specific to general.

Explanation

Alpha particles consist of 2 protons and 2 neutrons, making them identical to the nucleus of a helium atom (He²⁺).

They carry a +2 charge.

They are emitted during alpha decay in radioactive elements.

Explanation

The energy of a photon is calculated using the formula E = hf, where:

• h = Planck’s constant
• f = frequency of the photon

This shows that photon energy is directly proportional to its frequency.

Explanation

The kinetic energy is mathematically expressed as K. E=12mv2,

where m is the mass of the body and v is the velocity with which the body is moving

If velocity v is doubled, the kinetic energy becomes four times as kinetic energy is directly proportional to the square of velocity.

Explanation

PVC (Polyvinyl chloride) is formed by addition polymerization of vinyl chloride.

Polystyrene is also formed by addition polymerization of styrene (C₆H₅CH=CH₂).

Explanation

 Tetraethyl lead (TEL) was historically added to gasoline to increase its octane rating and reduce knocking, but due to its environmental concerns, it has largely been phased out. 

Explanation

The word furious means very angry.

It describes intense anger or rage.

Explanation

Benzene is an aromatic compound with a stable delocalized π-electron system.

It resists addition reactions (which would disrupt aromaticity) and typically undergoes substitution reactions instead.