Explanation

Octyl acetate is a natural ester known for its fruity, orange-like aroma.

It is commonly used in flavorings and perfumes to mimic orange scent.

Explanation

• Energy
• Momentum
• Charge

Explanation

The mass of one mole of electrons is 0.55g.      

- Mass of one electron ≈ 9.109 × 10⁻³¹ kg

- 1 mole of electrons = 6.022 × 10²³ electrons

- So, mass of 1 mole of electrons ≈  

  9.109 × 10⁻³¹ kg × 6.022 × 10²³ ≈ 5.48 × 10⁻⁴ kg ≈ 0.548 g

So the correct value is about 0.55 g

Explanation

Explanation

Insulin is a hormone secreted by the beta cells of the pancreas.

It helps regulate blood glucose levels by promoting glucose uptake into cells.

Explanation

 "Call on" means to visit someone, especially formally.

So:

"Mr. Steward will call on you at 8.00 P.M."

مسٹر اسٹیورڈ آپ سے شام 8 بجے ملاقات کریں گے۔

Explanation

The sentence describes a past continuous action interrupted by another past action.

So:

"He was sleeping when the doorbell rang."

جب دروازے کی گھنٹی بجی، وہ سو رہا تھا۔

Explanation

 Pb₃O₄ is commonly known as red lead, and its chemical name is lead tetraoxide, as it contains both Pb(II) and Pb(IV) oxidation states.

Explanation

 The bacterial phase of inactive growth, where bacteria prepare for division, is called the lag phase.

During this phase, bacteria are not actively multiplying but are instead adjusting to their new environment, synthesizing necessary enzymes and molecules, and potentially repairing any damage. 

Explanation

The correct proverb is: "Half a loaf is better than no bread."

It means having something is better than having nothing at all.