10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 4 - The Attic Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 3 - The Story of Mulan Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 3 - I am Every Woman Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Prose - 3 - Empowered Women Navigating The World Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Supplementary - 2 - Zigzag Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
TN 10th English Poem - 2 - The Grumble Family Important Questions And Answers Study Material - QB365 Set A
Published on: 03/07/2021
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Questions + Answers key
Take MCQ Science Test1.
Define reactant and product.
2.
Powdered calcium carbonate reacts more readily with hydrochloric acid than marble chips. Give reasons.
3.
What is acid rain?
4.
Differentiate combination and decomposition reactions.
5.
What is balanced chemical reaction?
1.
The compounds or elements which undergo reactions (reactants) are shown to the left of an arrow and the compounds formed (products) are shown to the right of the arrow
2.
(i) Greater the surface area, greater is the rate of the reaction
(ii) Powdered calcium carbonate offers large surface area for the reaction to occur at a faster rate.
3.
If the atmospheric air is polluted with oxide gases of sulphur and nitrogen, they get dissolved in the rain water and make its pH less than 7. Thus, if the pH of rain water is less than 7, then it is called acid rain. When acid rain flows into the rivers it lowers the pH of the river water also. The survival of aquatic life in such rivers becomes difficult.
4.
| COMBINATION REACTIONS | DECOMPOSITION REACTIONS |
|---|---|
| One or more reactants combine to form a single product | A single reactant is decomposed to form one or more products |
| Energy is released | Energy is absorbed |
| Elements or compounds may be the reactants | Single compound is the reactant. |
5.
A balanced chemical equation is the simplified representation of a chemical reaction which describes the chemical composition, physical state of the reactants and the products, and the reaction conditions.
10th Standard Syllabus & Materials
10th Standard
TN 10th English Prose - 2 - The Night the Ghost Got in Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Supplementary - 1 - The Tempest Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Poem - 1 - Life Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Prose - 1 - His First Flight Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
