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Viva questions for Physics Class 12
विज्ञान 10 – महत्वपूर्ण MCQs
Fundamentals of Arithmetic
Science 10 – Important MCQs

Balanced Chemical Equation

Balanced Chemical Equation

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Question 1 of 11

1. Question

In a balanced chemical equation, the number of atoms of each element is:

Always equal on both sides

Sometimes equal on both sides

Mostly equal on both sides

Rarely equal on both sides

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Question 2 of 11

2. Question

A balanced chemical equation obeys the law of:

Conservation of volume

Conservation of energy

Conservation of mass

Conservation of density

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Question 3 of 11

3. Question

What does it mean if a chemical equation is unbalanced?

It has more reactants than products

It has more products than reactants

the reaction does not take place in reality

The number of atoms of each element is not equal on both sides

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Question 4 of 11

4. Question

A balanced chemical equation represents

he activation energy required

the stoichiometry of a chemical reaction

the rate of reaction

the energy change in a reaction

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Question 5 of 11

5. Question

Which statement about a balanced chemical equation is correct?

It only includes products.

It shows the physical state of reactants only.

It obeys the law of conservation of mass.

It represents only reversible reactions.

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Question 6 of 11

6. Question

In a balanced chemical equation, the coefficients represent:

The number of atoms of each reactant and product involved in the reaction.

The energy change of the reaction.

The rate of reaction.

The number of molecules of each reactant and product involved in the reaction.

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Question 7 of 11

7. Question
While balancing a chemical equation, what cannot be done?
1. Change in the molecular formula of any reactant or product
2. Change in the coefficients of reactants and products
3. Writing reactants on the right hand side or writing products on the left hand side
1 and 2 only

2 and 3 only

1 and 3 only

3 only
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Question 8 of 11

8. Question

What is the benefit of balancing a chemical equation?

it helps in finding the rate of chemical equation

it helps in calculating amount of reactants required to produce particular amount of yields

it helps in finding the heat change during chemical equation

it helps in finding the colour change during chemical equation

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Question 9 of 11

9. Question

While balancing a chemical equation, you are allowed to change

Reactants

Products

Coefficients

Molecular formula

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Question 10 of 11

10. Question
In a balanced chemical equation, which of the following must always be equal?
1. Number of atoms of each element on both sides
2. Mass of total reactants and mass of total products
3. Volume of total reactants and volume of total products
4. Concentration of reactants and products
1 and 2 only

1, 2 and 3 only

1 and 3 only

4 only
Correct

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Question 11 of 11

11. Question

What is the significance of balancing chemical equations?

It ensures that all reactants are completely consumed.

It ensures that volumes of reactants are conserved.

It ensures that mass of products are conserved.

It ensures that mass of reactants and mass of products are in the correct ratio.

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Points Table
Viva questions for Physics Class 12
विज्ञान 10 – महत्वपूर्ण MCQs
Fundamentals of Arithmetic
Science 10 – Important MCQs

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