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Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - UPSC MCQ


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10 Questions MCQ Test - Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures

Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures for UPSC 2024 is part of UPSC preparation. The Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures questions and answers have been prepared according to the UPSC exam syllabus.The Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures below.
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Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 1

What are the constituent particles of an atom?

Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 1
Atoms are composed of three main subatomic particles: protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of the atom, while electrons orbit the nucleus in distinct energy levels or orbits.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 2

Who is credited with the discovery of the neutron?

Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 2
The neutron was discovered by James Chadwick in 1932 through experiments involving beryllium and paraffin. Chadwick's discovery was a significant contribution to our understanding of atomic structure.
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Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 3

What is the most abundant element in the Earth's crust by mass?

Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 3
Oxygen is the most abundant element in the Earth's crust by mass, making up approximately 46.6% of the crust's composition. It plays a crucial role in the formation of minerals and rocks.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 4
Which of the following is NOT a natural element?
Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 4
Technetium is not a natural element; it is a synthetic element, meaning it is artificially created and does not occur naturally on Earth.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 5
Who is considered the father of the periodic table?
Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 5
Dmitri Mendeleev is widely regarded as the father of the periodic table. He developed the first detailed periodic table based on the mass number of elements, which laid the foundation for our modern understanding of chemical elements and their properties.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 6
What is the fundamental unit of matter that cannot be divided further without losing its essential properties?
Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 6
The fundamental unit of matter that cannot be divided further without losing its essential properties is the atom.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 7

Which of the following substances is a compound?

Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 7

Carbon dioxide (CO2) is a compound because it consists of two different kinds of atoms (carbon and oxygen) chemically bonded together.

Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 8
How are mixtures different from compounds?
Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 8
Mixtures can be separated into their individual components using physical methods, whereas compounds cannot be separated into their constituent atoms by simple physical methods.
Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 9

Which of the following is an example of a mixture?

Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 9

A mixture is formed when two or more substances are physically combined without any chemical bonding between them. Sand and water represent a mixture of two distinct substances mixed together without a chemical reaction.

Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 10
Who developed the first detailed form of the periodic table based on mass number?
Detailed Solution for Test: Chemistry Basics – Atoms, Molecules, Elements, Compounds, and Mixtures - Question 10
Dmitri Mendeleev developed the first detailed periodic table based on the mass number of elements, which was a significant milestone in the organization of chemical elements.
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