Join WhatsApp ChannelDaily MCQs & Exam Updates

Chemistry MCQs

58 Questions Subject Test
Subject Preparation Guide

Prepare Chemistry with confidence

Practice the essential concepts of matter, atomic structure, chemical reactions, bonding and everyday applications of chemistry.

Atomic StructureChemical BondingReactionsOrganic Chemistry
Helpful for board examinations, entry tests and science-based competitive papers.
Chemistry preparation illustration
Subject Test

Test your Chemistry preparation

Questions are tracked as practiced when you open Show Answer & Explanation. Tracking stays only in this browser tab and no subject-test result is saved.

Practiced MCQs
0 / 58
Use the MCQs you already prepared, or launch a random test from the full subject bank.
No login required Result is not saved Choose your own MCQ count & timer
Choose your test mode
Choose any number up to 58 available MCQs.
Enter 0 for no timer, or choose 1–300 minutes.
Tip: prepare some MCQs first, then start a quick self-check from My Practiced MCQs to test exactly what you studied.
Filter: All Exams css pms fpsc ppsc nts | All Easy Medium Hard
41
Easy nts Uploaded: 07 Aug 2026

What is the chemical formula for baking soda?

  • A Na2CO3
  • B NaHCO3
  • C NaOH
  • D NaCl
Permalink
Correct Answer: Option B — NaHCO3
Explanation: Baking soda has the chemical formula NaHCO3, known as sodium bicarbonate. It is used widely in cooking as a leavening agent, as well as in cleaning products and as a mild antacid for stomach upset relief.
Submitted by: PaperMCQs
42
Easy ppsc nts Uploaded: 14 Jul 2026

Which gas has the chemical formula CO2?

  • A Carbon dioxide
  • B Carbon monoxide
  • C Sulfur dioxide
  • D Nitrogen dioxide
Permalink
Correct Answer: Option A — Carbon dioxide
Explanation: Carbon dioxide with the formula CO2 consists of one carbon atom double bonded to two oxygen atoms and is a major greenhouse gas produced by combustion and respiration.
Submitted by: PaperMCQs
43
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which gas is produced when an acid reacts with a metal?

  • A Oxygen
  • B Hydrogen
  • C Nitrogen
  • D Carbon dioxide
Permalink
Correct Answer: Option B — Hydrogen
Explanation: When acids react with metals hydrogen gas is produced along with a salt for example zinc reacting with hydrochloric acid produces zinc chloride and hydrogen gas.
Submitted by: PaperMCQs
44
Easy nts Uploaded: 07 Aug 2026

What is the boiling point of water at standard atmospheric pressure?

  • A 90°C
  • B 95°C
  • C 100°C
  • D 110°C
Permalink
Correct Answer: Option C — 100°C
Explanation: Water boils at 100°C under standard atmospheric pressure of 1 atmosphere at sea level. This boiling point decreases at higher altitudes due to reduced atmospheric pressure, affecting cooking times in mountainous regions.
Submitted by: PaperMCQs
45
Easy nts Uploaded: 07 Aug 2026

Which of the following is an example of a physical property?

  • A Flammability
  • B Reactivity with acid
  • C Boiling point
  • D Toxicity
Permalink
Correct Answer: Option C — Boiling point
Explanation: Boiling point is a physical property because it can be observed and measured without changing the chemical composition of a substance. Physical properties describe characteristics like color, density, and melting point.
Submitted by: PaperMCQs
46
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for sulfuric acid?

  • A H2SO4
  • B HNO3
  • C HCl
  • D H3PO4
Permalink
Correct Answer: Option A — H2SO4
Explanation: Sulfuric acid has the chemical formula H2SO4 and is one of the most important industrial chemicals used in fertiliser production batteries and various chemical processes.
Submitted by: PaperMCQs
47
Easy nts Uploaded: 07 Aug 2026

What is the process called when a liquid changes to vapor below its boiling point?

  • A Evaporation
  • B Sublimation
  • C Condensation
  • D Boiling
Permalink
Correct Answer: Option A — Evaporation
Explanation: Evaporation is the process where liquid molecules at the surface gain enough energy to escape into the gas phase below the boiling point. It occurs at any temperature and increases with higher surface area and temperature.
Submitted by: PaperMCQs
48
Easy ppsc nts Uploaded: 14 Jul 2026

Which noble gas is used in glowing advertising signs giving a reddish-orange colour?

  • A Argon
  • B Helium
  • C Neon
  • D Krypton
Permalink
Correct Answer: Option C — Neon
Explanation: Neon gas is used in neon signs and emits a characteristic reddish-orange glow when electricity passes through it due to the excitation of its electrons.
Submitted by: PaperMCQs
49
Easy nts Uploaded: 07 Aug 2026

Which of the following is a diatomic molecule?

  • A Helium
  • B Neon
  • C Oxygen
  • D Argon
Permalink
Correct Answer: Option C — Oxygen
Explanation: Oxygen exists naturally as a diatomic molecule, O2, where two oxygen atoms are covalently bonded together. This form is essential for respiration in most living organisms and combustion reactions on Earth.
Submitted by: PaperMCQs
50
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which scientist is known as the Father of Modern Chemistry?

  • A Isaac Newton
  • B Robert Boyle
  • C John Dalton
  • D Antoine Lavoisier
Permalink
Correct Answer: Option D — Antoine Lavoisier
Explanation: Antoine Lavoisier is known as the Father of Modern Chemistry for establishing the law of conservation of mass and developing a systematic chemical nomenclature.
Submitted by: PaperMCQs
51
Easy nts Uploaded: 07 Aug 2026

What is the common name for the compound CaCO3?

  • A Quicklime
  • B Slaked lime
  • C Gypsum
  • D Limestone
Permalink
Correct Answer: Option D — Limestone
Explanation: Calcium carbonate, commonly known as limestone, is a naturally occurring compound used extensively in construction, cement production, and as a source material for producing quicklime through thermal decomposition.
Submitted by: PaperMCQs
52
Easy ppsc nts Uploaded: 14 Jul 2026

What is the chemical symbol for silver?

  • A Si
  • B Ag
  • C Sr
  • D Sn
Permalink
Correct Answer: Option B — Ag
Explanation: The chemical symbol for silver is Ag derived from the Latin word Argentum and silver is a precious metal with the highest electrical and thermal conductivity of all metals.
Submitted by: PaperMCQs
53
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the SI unit of the amount of substance in chemistry?

  • A Gram
  • B Litre
  • C Kilogram
  • D Mole
Permalink
Correct Answer: Option D — Mole
Explanation: The Mole is the SI unit for the amount of substance and one mole of any substance contains approximately 6.022 x 10 to the power 23 particles.
Submitted by: PaperMCQs
54
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the name of the process by which a liquid changes to a gas at its boiling point?

  • A Vaporisation
  • B Sublimation
  • C Condensation
  • D Freezing
Permalink
Correct Answer: Option A — Vaporisation
Explanation: Vaporisation is the process by which a liquid changes to a gas at its boiling point when sufficient thermal energy overcomes the intermolecular forces holding liquid molecules together.
Submitted by: PaperMCQs
55
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for methane, the main component of natural gas?

  • A C2H6
  • B CH4
  • C C3H8
  • D C2H4
Permalink
Correct Answer: Option B — CH4
Explanation: Methane has the chemical formula CH4 consisting of one carbon atom bonded to four hydrogen atoms and is the simplest alkane and the primary component of natural gas.
Submitted by: PaperMCQs
56
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which element is the most abundant in the universe?

  • A Hydrogen
  • B Helium
  • C Carbon
  • D Oxygen
Permalink
Correct Answer: Option A — Hydrogen
Explanation: Hydrogen is the most abundant element in the universe making up approximately 75 percent of all normal matter by mass and is the primary fuel for nuclear fusion in stars.
Submitted by: PaperMCQs
57
Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which process converts sugar into alcohol and carbon dioxide using yeast?

  • A Distillation
  • B Hydrogenation
  • C Saponification
  • D Fermentation
Permalink
Correct Answer: Option D — Fermentation
Explanation: Fermentation is the anaerobic process by which yeast converts sugars into ethanol and carbon dioxide producing alcoholic beverages and is also used in bread making.
Submitted by: PaperMCQs
58
Easy ppsc nts Uploaded: 14 Jul 2026

What is the chemical name for baking soda commonly used in cooking?

  • A Sodium hydroxide
  • B Sodium carbonate
  • C Sodium chloride
  • D Sodium bicarbonate
Permalink
Correct Answer: Option D — Sodium bicarbonate
Explanation: Baking soda is sodium bicarbonate NaHCO3 which releases carbon dioxide gas when heated or mixed with acid causing baked goods to rise during cooking.
Submitted by: PaperMCQs
All Subjects
Biology 210 Chemistry 235 Computer Science 477 Current Affairs 1,079
1–4 of 11Auto-changing every 5s
Academic Subjects
Physics9th Class 248
View All Academic Classes
Mock Tests
Quick Test (20 Q) Full Mock Test
Practiced MCQs0 / 58