Explanation

Solar energy is created by nuclear fusion that takes place in the sun.

Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.

This process, known as a PP (proton-proton) chain reaction

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ND17-1-2023

Explanation

Frequency is the number of occurrences of a repeating event per unit of time.

SI unit hertz (Hz)

In SI base units: s−1

Derivations from other quantities: f = 1 / T

Dimension T^−1

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Explanation

• The primary component of natural gas is methane (CH4).
• Making up 70% to 90% or more of its composition.
• It is a colorless, odorless, and highly flammable hydrocarbon gas.
• Characteristics: It is a fossil fuel, often found in rock formations alongside oil or on its own. 

Last updated question 15 March2026

Explanation

Thymine is the nitrogenous base which is not present in RNA

Thymine is one of the four nucleobases found in DNA (along with adenine, guanine, and cytosine)

Whereas RNA contains uracil (U) instead of thymine.

RNA uses uracil as a complementary base to adenine during transcription,

while DNA uses thymine as a complementary base to adenine during replication.

Explanation

Explanation

Explanation

The maxim “Ubi jus ibi remedium” means where there is a legal right, there must be a legal remedy.

It ensures that every violation of a right is actionable in law.

Explanation

Article 175(2) of the Constitution of Pakistan 1973 provides that No Court shall have any jurisdiction save as is or may be conferred on it by the Constitution or by or under any law.

This ensures courts exercise jurisdiction only when authorized by law.

Explanation

Explanation