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Test: Chemical & Chemical Changes - Class 7 MCQ


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20 Questions MCQ Test Class 7 Oxford Science: Chapter Notes, Worksheets & Tests - Test: Chemical & Chemical Changes

Test: Chemical & Chemical Changes for Class 7 2024 is part of Class 7 Oxford Science: Chapter Notes, Worksheets & Tests preparation. The Test: Chemical & Chemical Changes questions and answers have been prepared according to the Class 7 exam syllabus.The Test: Chemical & Chemical Changes MCQs are made for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemical & Chemical Changes below.
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Test: Chemical & Chemical Changes - Question 1

Which of the following is NOT a chemical substance?

Detailed Solution for Test: Chemical & Chemical Changes - Question 1

Sand is a mixture of different substances and not a pure chemical substance.

Test: Chemical & Chemical Changes - Question 2

What is the chemical symbol for gold?

Detailed Solution for Test: Chemical & Chemical Changes - Question 2

The chemical symbol for gold is Au, derived from the Latin word 'aurum'.

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Test: Chemical & Chemical Changes - Question 3

Which of the following is a correct chemical formula for water?

Detailed Solution for Test: Chemical & Chemical Changes - Question 3

The correct chemical formula for water is H2O, indicating two hydrogen atoms and one oxygen atom.

*Multiple options can be correct
Test: Chemical & Chemical Changes - Question 4

What is the product of the chemical reaction between hydrochloric acid and sodium hydroxide?

Detailed Solution for Test: Chemical & Chemical Changes - Question 4

The chemical reaction between hydrochloric acid and sodium hydroxide produces salt and water.

Test: Chemical & Chemical Changes - Question 5

Which of the following is a physical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 5

Melting of ice is a physical change as it does not involve any chemical reaction.

Test: Chemical & Chemical Changes - Question 6

What is the process of separating a solid from a liquid by evaporating the liquid and allowing the solid to crystallize called?

Detailed Solution for Test: Chemical & Chemical Changes - Question 6

Crystallization is the process of separating a solid from a liquid by evaporating the liquid and allowing the solid to crystallize.

Test: Chemical & Chemical Changes - Question 7

Which of the following is a chemical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 7

Burning of wood is a chemical change as it involves a chemical reaction resulting in the formation of ash and gases.

Test: Chemical & Chemical Changes - Question 8

What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?

Detailed Solution for Test: Chemical & Chemical Changes - Question 8

The balanced chemical equation for the reaction between hydrogen and oxygen to form water is 2H2 + O2 → 2H2O.

Test: Chemical & Chemical Changes - Question 9

Which of the following is a chemical substance used in photography?

Detailed Solution for Test: Chemical & Chemical Changes - Question 9

Silver nitrate is a chemical substance used in photography for developing film.

Test: Chemical & Chemical Changes - Question 10

What is the chemical formula for table salt?

Detailed Solution for Test: Chemical & Chemical Changes - Question 10

The chemical formula for table salt is NaCl, indicating one sodium atom and one chlorine atom.

Test: Chemical & Chemical Changes - Question 11

Which of the following is a chemical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 11

Burning of gasoline is a chemical change as it involves a chemical reaction resulting in the release of energy and combustion products.

Test: Chemical & Chemical Changes - Question 12

What is the process of separating a solid from a liquid by pouring the liquid into another container called?

Detailed Solution for Test: Chemical & Chemical Changes - Question 12

Decantation is the process of separating a solid from a liquid by pouring the liquid into another container.

Test: Chemical & Chemical Changes - Question 13

Which of the following is a physical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 13

Freezing of water is a physical change as it does not involve any chemical reaction.

Test: Chemical & Chemical Changes - Question 14

What is the chemical symbol for carbon?

Detailed Solution for Test: Chemical & Chemical Changes - Question 14

The chemical symbol for carbon is C, derived from the Latin word 'carbo'.

Test: Chemical & Chemical Changes - Question 15

Which of the following is a chemical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 15

Burning of a candle is a chemical change as it involves a chemical reaction resulting in the production of carbon dioxide and water vapor.

Test: Chemical & Chemical Changes - Question 16

What is the balanced chemical equation for the reaction between sodium and chlorine to form table salt?

Detailed Solution for Test: Chemical & Chemical Changes - Question 16

The balanced chemical equation for the reaction between sodium and chlorine to form table salt is 2Na + Cl2 → 2NaCl.

Test: Chemical & Chemical Changes - Question 17

Which of the following is a chemical substance used in fertilizer?

Detailed Solution for Test: Chemical & Chemical Changes - Question 17

Ammonium nitrate is a chemical substance used in fertilizer for providing nitrogen to plants.

Test: Chemical & Chemical Changes - Question 18

What is the chemical formula for carbon dioxide?

Detailed Solution for Test: Chemical & Chemical Changes - Question 18

The chemical formula for carbon dioxide is CO2, indicating one carbon atom and two oxygen atoms.

Test: Chemical & Chemical Changes - Question 19

Which of the following is a physical change?

Detailed Solution for Test: Chemical & Chemical Changes - Question 19

Dissolving of salt in water is a physical change as it does not involve any chemical reaction.

Test: Chemical & Chemical Changes - Question 20

What is the process of separating a mixture of liquids with different boiling points by heating and condensing their vapors called?

Detailed Solution for Test: Chemical & Chemical Changes - Question 20

Distillation is the process of separating a mixture of liquids with different boiling points by heating and condensing their vapors.

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