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NASTP Institute of Information Technology13 Questions

Chemistry MCQs

Practice Chemistry multiple-choice questions for NASTP Institute of Information Technology competitive exams. Each question includes the correct answer and a short explanation, and past-paper questions are marked so you can revise both repeated and fresh material in one place.

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0
7
14
1
ExplanationA neutral solution has an equal concentration of hydronium and hydroxide ions, resulting in a pH of 7 at standard temperature.
Proton
Neutron
Electron
Nucleus
ExplanationThe mass of an electron is approximately 1/1836th of a proton or neutron, making it effectively negligible in mass calculations.
4
6
8
12
ExplanationCarbon is the sixth element in the periodic table, meaning it has 6 protons.
Ionic
Covalent
Metallic
Hydrogen
ExplanationCovalent bonding is characterized by the sharing of electron pairs between atoms to achieve stability.
CH4
C2H6
CO2
CH3OH
ExplanationMethane is the simplest alkane consisting of one carbon atom and four hydrogen atoms.
Oxygen
Hydrogen
Carbon Dioxide
Nitrogen
ExplanationThe reaction of an acid and a metal carbonate produces salt, water, and carbon dioxide gas.
Increases activation energy
Decreases activation energy
Is consumed in the reaction
Changes the products
ExplanationCatalysts increase the rate of reaction by providing an alternative pathway with lower activation energy.
0.5
1
2
10
ExplanationAccording to Avogadro's law, one mole of any ideal gas occupies 22.4 liters at STP.
Oxygen
Fluorine
Chlorine
Nitrogen
ExplanationFluorine is the most electronegative element due to its small size and high effective nuclear charge.
A reaction that absorbs heat
A reaction that releases heat
A reaction that produces no energy
A reaction that requires light
ExplanationExothermic reactions release energy into the surroundings, usually in the form of heat.
Principal
Azimuthal
Magnetic
Spin
ExplanationThe azimuthal quantum number (l) determines the shape of the orbital (s, p, d, f).
Combustion
Neutralization
Oxidation
Reduction
ExplanationWhen an acid and a base react, they neutralize each other, producing water and a salt.
Protium
Deuterium
Tritium
Helium
ExplanationProtium has zero neutrons, Deuterium has one, and Tritium has two.

Frequently Asked Questions

Are these Chemistry MCQs free?

Yes. Every Chemistry MCQ on this page is free to practice, including the correct answer and explanation.

Do these include past-paper questions?

Yes — questions sourced from past papers are clearly marked with a "Past Paper" badge, alongside fresh practice questions.

Which exams do these Chemistry MCQs help with?

They are aimed at NASTP Institute of Information Technology and related Pakistani competitive exams that test Chemistry.

How should I practice subject-wise MCQs?

Attempt each question first, then reveal the answer and read the explanation. Short, focused sessions on one subject work better than long unstructured reading.

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