Explanation

The carbon dioxide (CO₂) molecule has a linear structure, with a bond angle of 180°.

Due to the two double bonds between carbon and oxygen atoms.

Explanation

یہ حدیث رسول ﷺ کا مفہوم ہے کہ حقیقی مسلمان وہ ہے جس سے دوسرے مسلمان زبان اور ہاتھ سے محفوظ رہیں۔

اس کا مطلب ہے کہ مسلمان کو دوسروں کو نقصان پہنچانے سے بچنا چاہیے۔

Explanation

A solution is a homogeneous mixture where one substance (solute) is completely dissolved in another (solvent).

Sea water: A true solution where salts (like NaCl) are completely dissolved in water.

Explanation

1. Sodium (Na)
2. Hydrogen (H)
3. Carbon (C)
4. Oxygen (O)

Explanation

Ferrum is the Latin name for iron, which is why its chemical symbol is Fe.

It is a transition metal used widely in construction.

It is essential in the human body for forming hemoglobin.

Explanation

The number of different types of gametes is calculated using the formula 2ⁿ, where n is the number of heterozygous gene pairs.

In genotype AaBb, there are 2 heterozygous pairs (A/a and B/b), so 2² = 4 types of gametes: AB, Ab, aB, ab.

Explanation

Hyaline cartilage provides smooth surfaces for movement at joints and supports respiratory structures like the nose, trachea, and bronchi.

It is the most common type of cartilage and appears glassy under the microscope due to its fine collagen fibers.

Explanation

Tar is the major component of particulate matter inhaled in cigarette smoke.

It contains several carcinogens.

It is responsible for lung damage.

Explanation

Boron is a metalloid, showing properties between metals and non-metals.

Aluminum is a metal.

Phosphorus is a non-metal.

Explanation

The d subshell has 5 orbitals, each can hold 2 electrons, so total 10 electrons.

This is standard in electron configuration rules in chemistry.