Explanation

Lead (Pb) belongs to Group IVA (Group 14) of the periodic table, along with carbon, silicon, and tin.

Elements in this group have 4 valence electrons and show a mix of metallic and non-metallic properties.

Explanation

Conveying means علم کی منتقلی یا بات چیت کرنا

Passing on means دوسروں کو معلومات کا اشتراک یا منتقل کرنا

Explanation

Transfusion of blood is: The process of transferring blood from one person to another.

Explanation

Sonar stands for "Sound Navigation and Ranging."

It uses high-frequency sound waves (ultrasonic waves) to detect and locate objects underwater

Explanation

The substance with the most moles is 3.8 g of H2O (0.211 moles).

Therefore, it has the largest number of molecules. 

Explanation

 Plants that do not have adaptations to remove excess water from their cells in freshwater environments are xerophytes.

These plants are adapted to survive in dry, arid conditions and have evolved to conserve water, not to deal with excess water influx. 

Explanation

“Fiddles” likely means wasting time, fidgeting, or avoiding doing the task seriously.

Rejects رد کرتا ہے۔ – Closest in meaning (implies resistance, unwillingness, or avoidance)

Explanation

Raney nickel is prepared by treating a nickel-aluminum (Ni-Al) alloy with concentrated NaOH.

This process removes aluminum, leaving behind porous nickel, which acts as an excellent hydrogenation catalyst.

Explanation

 A dilute solution compared to cell concentration is termed hypotonic

This means the solution has a lower concentration of solutes (and a higher concentration of water) than the cell's internal environment. 

Explanation

Laughing gas is the common name for nitrous oxide (N₂O), a colorless gas with a slightly sweet smell.

It acts as a mild anesthetic and analgesic.

It is often used in dentistry and surgery.