An ion with positive charge is called .

Important Questions on Atoms, Molecules and Radicals

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7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 1

An ion with negative charge is called as _____.

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IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 1

$2{\mathrm{H}}_2$ means two _____  (molecules / ions) of hydrogen.

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IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 1

_____ is a triatomic molecule. (ozone / chlorine)

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IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 1

Metals have _____ valency. (variable / zero)

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7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 1

Chemical name of caustic soda is _____.

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IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 2

The valency of iron in ${\mathrm{Fe}}_2{\mathrm{O}}_3$ is

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IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 2

Which of the following has valency $4$?

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7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 4 - Atoms, Molecules and Radicals>OBJECTIVE TYPE QUESTIONS>Q 2

The sulphate radical is written as ${{\mathrm{SO}}_4}^{2-}$. What is the formula of calcium sulphate?