Join WhatsApp ChannelDaily MCQs & Exam Updates

Chemistry MCQs

110 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.

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 / 110

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

My Practiced MCQs Use only the MCQs you have opened with Show Answer & Explanation in this browser tab. Entire Chemistry Subject Get random MCQs from the complete subject bank to challenge your overall preparation.

Number of Questions

Choose any number up to 110 available MCQs.

Time (Minutes)

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

Medium fpsc ppsc nts Uploaded: 05 Aug 2026

Which polymer is used to coat non-stick cookware due to its very low friction coefficient?

A PVC
B Polythene
C PTFE Teflon
D Bakelite

Permalink

Correct Answer: Option C — PTFE Teflon

Explanation: Polytetrafluoroethylene PTFE commonly known as Teflon is used to coat non-stick cookware due to its extremely low coefficient of friction and resistance to high temperatures.

Submitted by: PaperMCQs

Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which element is a semiconductor and is the main component of computer chips?

A Carbon
B Germanium
C Silicon
D Gallium

Permalink

Correct Answer: Option C — Silicon

Explanation: Silicon is a semiconductor element with atomic number 14 and is the primary material used in computer chips integrated circuits and solar cells due to its controllable conductivity.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

What type of bond is formed by the sharing of electrons?

A Metallic bond
B Hydrogen bond
C Ionic bond
D Covalent bond

Permalink

Correct Answer: Option D — Covalent bond

Explanation: A covalent bond forms when two atoms share one or more pairs of electrons to achieve stable electron configurations. This type of bonding is common between nonmetal atoms and forms the basis of most organic molecules.

Submitted by: PaperMCQs

Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which acid is found naturally in vinegar?

A Acetic acid
B Sulfuric acid
C Hydrochloric acid
D Citric acid

Permalink

Correct Answer: Option A — Acetic acid

Explanation: Acetic acid also known as ethanoic acid is the organic acid found in vinegar at concentrations of 4 to 8 percent giving it its characteristic sour taste and pungent smell.

Submitted by: PaperMCQs

Medium nts Uploaded: 06 Aug 2026

What is the process called when a solid changes directly to a gas?

A Evaporation
B Sublimation
C Condensation
D Deposition

Permalink

Correct Answer: Option B — Sublimation

Explanation: Sublimation is the direct transition of a substance from solid to gas without passing through the liquid phase. Dry ice, which is solid carbon dioxide, is a common example of a substance that sublimes at room temperature.

Submitted by: PaperMCQs

Medium fpsc ppsc nts Uploaded: 14 Jul 2026

Which reaction type involves the breaking of a large molecule into smaller ones?

A Synthesis
B Displacement
C Decomposition
D Neutralisation

Permalink

Correct Answer: Option C — Decomposition

Explanation: Decomposition reactions break down a single compound into two or more simpler substances often using heat electricity or light as in the thermal decomposition of calcium carbonate.

Submitted by: PaperMCQs

Medium nts Uploaded: 06 Aug 2026

Which compound is commonly known as marsh gas?

A Ethane
B Propane
C Methane
D Butane

Permalink

Correct Answer: Option C — Methane

Explanation: Methane is commonly referred to as marsh gas because it forms naturally from the decomposition of organic matter in swamps and marshes. It is also the main component of natural gas used as fuel worldwide.

Submitted by: PaperMCQs

Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the atomic number of oxygen?

A 6
B 10
C 8
D 16

Permalink

Correct Answer: Option C — 8

Explanation: Oxygen has an atomic number of 8 meaning it has 8 protons in its nucleus and typically 8 electrons in its neutral form with an electronic configuration of 2,6.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

Which element is essential for the formation of hemoglobin?

A Iron
B Copper
C Magnesium
D Zinc

Permalink

Correct Answer: Option A — Iron

Explanation: Iron is a crucial component of hemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body. Iron deficiency can lead to anemia, characterized by fatigue and reduced oxygen delivery.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

What is the common name of the compound H2O2?

A Water
B Hydrogen peroxide
C Hydrogen sulfide
D Hydrochloric acid

Permalink

Correct Answer: Option B — Hydrogen peroxide

Explanation: H2O2 is commonly known as hydrogen peroxide, a compound used as a mild antiseptic and bleaching agent. It decomposes into water and oxygen and is a stronger oxidizing agent than water due to its extra oxygen atom.

Submitted by: PaperMCQs

Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical formula for calcium hydroxide also known as slaked lime?

A CaO
B CaCO3
C Ca(OH)2
D CaCl2

Permalink

Correct Answer: Option C — Ca(OH)2

Explanation: Calcium hydroxide Ca(OH)2 also called slaked lime is made by adding water to quicklime CaO and is used in construction water treatment and to neutralise acidic soils.

Submitted by: PaperMCQs

Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the name of the horizontal rows in the periodic table?

A Groups
B Blocks
C Periods
D Families

Permalink

Correct Answer: Option C — Periods

Explanation: Periods are the horizontal rows in the periodic table and elements in the same period have the same number of electron shells with properties changing systematically across each period.

Submitted by: PaperMCQs

Medium nts Uploaded: 06 Aug 2026

Which acid is commonly found in the human stomach?

A Sulfuric acid
B Acetic acid
C Hydrochloric acid
D Nitric acid

Permalink

Correct Answer: Option C — Hydrochloric acid

Explanation: Hydrochloric acid is secreted by the stomach lining to aid digestion by breaking down food and activating digestive enzymes. It also helps kill harmful bacteria that may be ingested along with food.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

Which of the following is an example of an alkali metal?

A Calcium
B Magnesium
C Potassium
D Aluminium

Permalink

Correct Answer: Option C — Potassium

Explanation: Potassium belongs to Group 1 of the periodic table, known as alkali metals. These elements are highly reactive, have a single valence electron, and readily form +1 ions in chemical reactions.

Submitted by: PaperMCQs

Medium fpsc ppsc nts Uploaded: 14 Jul 2026

What is the chemical name of aspirin widely used as a pain reliever?

A Paracetamol
B Acetylsalicylic acid
C Ibuprofen
D Salicylic acid

Permalink

Correct Answer: Option B — Acetylsalicylic acid

Explanation: Aspirin is the brand name for acetylsalicylic acid synthesised by acetylating salicylic acid and has analgesic anti-inflammatory and antiplatelet properties.

Submitted by: PaperMCQs

Medium nts Uploaded: 06 Aug 2026

What is the general formula for alkanes?

A CnH2n+2
B CnH2n
C CnH2n-2
D CnHn

Permalink

Correct Answer: Option A — CnH2n+2

Explanation: Alkanes follow the general formula CnH2n+2, where n represents the number of carbon atoms in the molecule. These saturated hydrocarbons contain only single bonds between carbon atoms and are relatively unreactive compared to alkenes.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

What is the chemical name for table salt?

A Sodium nitrate
B Sodium bicarbonate
C Sodium chloride
D Sodium sulfate

Permalink

Correct Answer: Option C — Sodium chloride

Explanation: Table salt is chemically known as sodium chloride, formed by the ionic bond between sodium cations and chloride anions. It is essential for human physiology and widely used as a food preservative and seasoning.

Submitted by: PaperMCQs

Easy fpsc ppsc nts Uploaded: 14 Jul 2026

What is the atomic number of carbon?

A 4
B 6
C 8
D 12

Permalink

Correct Answer: Option B — 6

Explanation: Carbon has an atomic number of 6 meaning it has 6 protons in its nucleus and 6 electrons in its neutral state making it the basis of all organic chemistry.

Submitted by: PaperMCQs

Easy fpsc ppsc nts Uploaded: 14 Jul 2026

Which indicator turns red in acidic solutions and blue in alkaline solutions?

A Litmus
B Universal indicator
C Phenolphthalein
D Methyl orange

Permalink

Correct Answer: Option A — Litmus

Explanation: Litmus is a natural pH indicator derived from lichens that turns red in acidic solutions with pH below 7 and blue in alkaline solutions with pH above 7.

Submitted by: PaperMCQs

Easy nts Uploaded: 07 Aug 2026

What is the name of the negatively charged subatomic particle?

A Electron
B Nucleon
C Proton
D Neutron

Permalink

Correct Answer: Option A — Electron

Explanation: Electrons are negatively charged subatomic particles that orbit the nucleus of an atom in defined energy levels. They are much lighter than protons and neutrons and are responsible for chemical bonding between atoms.

Submitted by: PaperMCQs

Practiced MCQs0 / 110

Questions Minutes

Chemistry MCQs

Prepare Chemistry with confidence

Test your Chemistry preparation

All Subjects

Academic Subjects

Mock Tests