Explanation

The common border between Pakistan and Afghanistan is called the Durand Line

The length of the border is 2611 km

It was drawn on November 12, 1893, in Kabul Afghanistan

It was an agreement between Mortimer Durand and Abdul Rahman.

There are two significant ethnic groups near the Durand line:

• Punjabis: biggest ethnic group in Pakistan
• Pashtuns: are the largest ethnic group in Afghanistan

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According to the Survey of Pakistan, the border between Pakistan and Afghanistan is 2611 km

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Explanation

Explanation

Avogadro's number represents the specific quantity of particles (atoms, molecules, ions, or electrons) contained in one mole of a substance.

It's a large constant value approximately equal to 6.022 x 10^23. 

Explanation

Nitrogen gas (N₂) has a triple covalent bond between the two nitrogen atoms.

This triple bond makes N₂ very stable and unreactive under normal conditions.

Explanation

Gas: No definite shape or volume – Expands to fill any container.

Example: Oxygen, CO₂.

Solid: Fixed shape and volume (e.g., iron).

Liquid: Fixed volume, no fixed shape (e.g., water).

Explanation

Discount means a reduction in the marked or original price of an item.

It is commonly offered during sales, promotions, or special offers to attract buyers.

Explanation

White House situated: Washington

White House construction completed: 1800

John Adams was: First US president to arrive White House (November 1800)

Explanation

The correct phrase is “He is junior to me”.

This is because junior is a comparative adjective.

that is used to show the relation between two people in terms of rank, age, or experience.

Comparative adjectives like junior, senior, superior, or inferior are followed by the preposition to, not than.

Explanation

Ozone (O₃) is a triatomic (three-atom) allotropic form of oxygen

Allotropy: is when an element exists in different forms in the same physical state. 

Oxygen: is the element in question. 

Ozone (O₃): is the specific allotropic form that contains three oxygen atoms in each molecule. 

Diatomic oxygen (O₂): is the other common allotrope of oxygen, containing two oxygen atoms per molecule. 

Explanation