Explanation

Kashmir Solidarity Day or Kashmir Day is a national holiday observed in Pakistan 

Date: February 5

Kashmir Day Event Length: 1 Day

Kashmir Day Related to the Kashmir Conflict

Kashmir Day was Started by: Jamaat-e-Islami Pakistan in 1990

Kashmir Day was first proposed by Qazi Hussain Ahmad 

In 1991, the then-Prime Minister of Pakistan Nawaz Sharif called for a "Kashmir Solidarity Day Strike"

Explanation

• Carbon has a valency of 4, meaning it can form 4 covalent bonds with other atoms.
• This property allows carbon to form complex organic compounds.
• It is the backbone of all organic molecules.

Additional information:

Examples of Carbon Compounds (5):

1. Methane (CH₄)
2. Ethane (C₂H₆)
3. Glucose (C₆H₁₂O₆)
4. Ethanol (C₂H₅OH)
5. Carbon dioxide (CO₂)

Last verified on 19-01-2026

Explanation

In endothermic reactions, energy in the form of heat is taken in from the surroundings.

Examples include photosynthesis and melting of ice, where heat is absorbed to proceed.

In an exothermic reaction, energy (heat) is released/evolved to the surroundings.

Examples include combustion of fuels and respiration.

Explanation

"Rainfall" is uncountable, so we use "has" not "have."

Correct sentence → There has been heavy rainfall yesterday.

Explanation

• Frequency is the number of occurrences of a repeating event per unit of time.
• The SI unit of frequency is the hertz (Hz).
• 1 Hz = 1 cycle or vibration per second
• Unit: Hz = s⁻¹ (per second)
• Named after physicist Heinrich Hertz
• Used for waves, oscillations, sound, and electromagnetic radiation
• Derivations from other quantities: f = 1 / T
• Dimension T^−1

Explanation

• Au comes from the Latin word aurum, meaning "gold" (from "glowing dawn")
• Atomic number: 79
• Belongs to group 11 
• Category: transition metal

Additional information:

• Atomic mass: 196.97 u
• Melting point: 1,064°C
• Boiling point: 2,856°C
• Density: 19.3 g/cm³ (very heavy)

Explanation

A precis is a concise summary that is about one-third the length of the original text.

Its purpose is to present the main ideas clearly and briefly.

Explanation

After “prefer … to”, the verb takes the -ing form.

Correct usage: “I prefer writing to reading.”

Explanation

The adverb “firmly” correctly modifies the verb “disciplined.”

Corrected sentence: “The teacher firmly disciplined the students for their misbehavior.”

Explanation

A Wheatstone bridge is an electrical circuit designed to measure unknown resistance accurately.

It works by comparing it with the known resistances in a balanced condition.