All about chemistry

All about chemistry Explore the world of atoms, molecules, and reactions with our engaging chemistry learning resources.

31/05/2026

A molecule of carbon dioxide (CO₂) contains:
A) 1 Carbon and 2 Oxygen atoms
B) 2 Carbon and 1 Oxygen atom
C) 1 Carbon and 1 Oxygen atom
D) 2 Carbon and 2 Oxygen atoms

31/05/2026

Water (H₂O) is made up of:

A) 1 Hydrogen and 2 Oxygen atoms
B) 2 Hydrogen and 1 Oxygen atom
C) 2 Oxygen and 2 Hydrogen atoms
D) 1 Hydrogen and 1 Oxygen atom

31/05/2026

Which of the following is a molecule?
A) Oxygen (O₂)
B) Iron (Fe)
C) Copper (Cu)
D) Gold (Au)

31/05/2026

1. What is a molecule?

A) A single atom only
B) Two or more atoms chemically joined together
C) A type of cell
D) A metal

30/05/2026

Which of the following exhibits hydrogen bonding?
A. CH₄
B. HCl
C. NH₃
D. CO₂

26/05/2026

Choose the correct option
♦️ An atom with a charge is called:
a. An electron
b. A molecule
c. A metal
d. An ion

25/05/2026

In which of the following pairs is the second atom larger than the first?
(a) Br, Cl (b) Na, Mg
(c) Sr, Ca (d) N, P

17/05/2026

🧪 CHEMISTRY FACT OF THE DAY 🧪
🔥 Did You Know?
Water can boil and freeze at the same time under special conditions called the Triple Point! 😲❄️🔥
At this exact temperature and pressure, water exists as: 💧 Liquid
🧊 Solid
☁️ Gas
Science is full of magic — but it’s actually chemistry! ⚗️✨
📌 Follow All About Chemistry for more amazing science facts, MCQs, notes, and experiments.

17/05/2026

Which of the following is a homogeneous mixture.
a. Smoke
b. Air
c. Fog
d. Smig

14/05/2026

Which of the following series of elements have nearly the same atomic
radii?
(a) F, Cl, Br, I
(b) Na, K, Rb, Cs
(c) Li, Be, B, C
(d) Fe, Co, Ni, Cu



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