Explanation

Micronutrients are essential elements required by organisms in small quantities for proper growth and development.

Among the options:

• Manganese, Iodine, Zinc, and Iron are all recognized micronutrients for humans and plants.

• Sodium, Magnesium, and Sulfur are considered macronutrients because they are required in larger amounts.

Explanation

: CsCl has a body-centered cubic (bcc) structure, where each Cs⁺ ion is surrounded by 8 Cl⁻ ions and vice versa.

Explanation

Work is done when a force causes displacement of an object in the direction of the force.

A man pushing against the wall, although force is applied, the wall does not move, so no displacement occurs → no work is done.

Explanation

 In $text{K}_2text{Cr}_2text{O}_7$, total oxidation state must be 0. K = +1, O = –2, so Cr must be +6 to balance the equation:

$$2(+1)+2(x)+7(–2)=0\Rightarrow x=+6$$

Explanation

 "Contemptuous" means showing deep hatred or disapproval, often with a sense of superiority.

A "contemptuous noise" would suggest a sound expressing scorn or disdain, not cheerfulness or humor.

Explanation

 CH₃COONH₄ – Salt of weak acid (acetic acid) and weak base (ammonia) → Can be slightly acidic, neutral, or basic depending on their relative strength, but usually basic if acetate dominates

Explanation

Acceleration is related to force, mass, and change in velocity (from Newton’s 2nd Law).

It has no relation with temperature, which is a thermal property.

Explanation

Bridges are used to connect similar LANs that use the same network protocols.

They help manage traffic and reduce collisions by dividing networks into segments.

Explanation

 He was sitting at the desk.

وہ میز پر بیٹھا تھا۔

"At the desk" refers to someone's position near or by the desk, typically for working, reading, or studying.

Explanation

If two lines are parallel, the difference of their slopes is zero.

This is because parallel lines have the same slope.