Explanation

Kinetic energy (KE) is expressed as: 

KE = 1/2 * mv² 

Where: m = mass (dimensions: M¹), v = velocity (dimensions: L¹T⁻¹), and v² = (L¹T⁻¹)² = L²T⁻². 

Therefore, the dimensions of KE are: 

KE = M¹ * (L²T⁻²) = M¹L²T⁻² 

Explanation

CaCO₃ (Calcium carbonate)

No, it is not hygroscopic.

It does not absorb moisture significantly → NOT a desiccating agent

Explanation

 Xenon is the most polarized noble gas due to its large size and electron cloud,

This makes it more susceptible to distortion by external electric fields. 

Explanation

 Newspaper, and paper products in general, can typically be recycled around 5 to 7 times

Before the fibers become too short and weak to be reused effectively in the recycling process.

Explanation

The troposphere is the lowest layer of the atmosphere, directly in contact with the Earth's surface.

It is where weather occurs and contains about 75% of the atmosphere’s mass.

The principle constituent of the atmosphere of the Earth is called Nitrogen.

Explanation

Apparent weight = Normal force, and when moving upward with acceleration g, total acceleration = g + g = 2g.

So, Apparent weight = m × (g + g) = 2mg.

Explanation

Chronology means تاریخ

Time sequence means وقت کی ترتیب

Explanation

In pair production, several quantities are conserved

Let's evaluate each option:

- Charge:

A charge is conserved in pair production, as the total charge before and after the interaction remains the same

Due to the opposite but equal charges of the electron and positron.

- Energy:

Energy is conserved in pair production, with the total energy before the interaction equal to the sum of the energies of the electron and positron after the interaction.

- Linear Momentum:

Linear momentum is conserved in pair production, with the total momentum before the interaction equal to the sum of the momenta of the particles involved.

Explanation

The pH of a mixture of CH₃COONa (sodium acetate) and CH₃COOH (acetic acid) is C. <7. 

This mixture forms a buffer solution, where the weak acid (CH₃COOH)

Its conjugate base (CH₃COO-) is present together, resulting in a pH that is less than 7 (acidic) but not extremely so

Explanation

Ban means کسی چیز کی باضابطہ یا قانونی روک تھام ، خاص طور پر اتھارٹی کے ذریعہ

Prohibition means سرکاری طور پر کسی چیز سے منع کرنے کے عمل پر