Explanation

In a bomb calorimeter, reactions are carried out at constant volume.

This is because the calorimeter is designed to keep the volume constant during the reaction.

Any heat released or absorbed during the reaction causes a temperature change, which is measured to determine the heat of the reaction.

The constant volume ensures that the heat measured is solely due to the chemical reaction taking place

Without any external influences like changes in pressure or volume.

Explanation

He had his breakfast at 9 o’clock.

The sentence refers to a specific time in the past ("at 9 o’clock"), so the correct tense is simple past.

"Had" is the simple past tense of "have," and it fits well with a completed past action at a specific time.

Explanation

carbohydrates are essential and efficient fuel to the muscles. 

the circulating form of carbohydrate in the blood is called glucose. 

the storage form of carbohydrates in the liver and muscles is called as glycogen.

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ND11-12-2022

Explanation

Metals make up the majority of elements in the periodic table, especially on the left and center.

They are generally good conductors, malleable, ductile, and have high melting points.

Explanation

The pair of physical quantities with the same dimensions is Work and Energy.           

Both work and energy have the same dimensional formula: ML²T⁻²

Explanation

Tetanus is caused by a bacterium (Clostridium tetani), not a virus.

Explanation

"Damnation means لعنت" means eternal punishment or being condemned

Condemnation means مزمت

Explanation

For 2p orbitals, the principal quantum number (n) is 2.

The azimuthal quantum number (l) for a p-orbital is 1.

So, n = 2, l = 1 is correct.

Explanation

 The moment of inertia of a solid sphere is (2/5)MR^2, where M is the mass and R is the radius.

This formula applies when the axis of rotation passes through the center of the sphere. 

Explanation

I hope they will not have left the city before I reach there.

مجھے امید ہے کہ میرے وہاں پہنچنے سے پہلے وہ شہر چھوڑ کر نہیں گئے ہوں گے۔

The sentence talks about a future action ("before I reach there") 

Future completed action is the future perfect:

will not have + past participle

"Will not have left" shows:

A completed action in the future

That you hope they are still there when you arrive