Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Use your brain power!>Q 1

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10th Maharashtra Board

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Earn 100

What is the difference in the process of dissolution and a chemical reaction?

Important Questions on Chemical Reactions and Equations

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10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Use your brain power!>Q 2

Does a new substance form when a solute dissolves in a solvent ?

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10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Use your brain power!>Q 1

Which is the oxidant used for purification of drinking water?

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10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Use your brain power!>Q 2

Why is potassium permanganate used during cleaning water tanks?

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10th Maharashtra Board

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Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Can you tell?>Q 3

Some more examples of redox reaction are as follows. Identify the reductants and oxidants from them.

$2 H_{2} S + {SO}_{2} \to 3 S ↓ + 2 H_{2} O$

${MnO}_{2} + 4 HCl \to {MnCl}_{2} + 2 H_{2} O + {Cl}_{2} ↑$

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10th Maharashtra Board

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Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Can you tell?>Q 4

If oxidation means losing electrons, what is meant by reduction?

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10th Maharashtra Board

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Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Can you tell?>Q 5

Write the reaction of formation of

{Fe}^{2 +}

by reduction

{Fe}^{3 +}

by making use of the symbol (

e^{-}

).

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10th Maharashtra Board

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Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Think about it>Q 6

The lustre of the surface of the aluminium utensils in the house is lost after a few days. Why does this happen?

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10th Maharashtra Board

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Science and Technology Standard Ten Part - 1>Chapter 3 - Chemical Reactions and Equations>Find out

How are the blackened silver utensils and patinated (greenish) brass utensils cleaned?