Paragraph based question from chapter chemical reaction and equations
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I can't find paragraph based questions but this might help you for the Boards( ╹▽╹ )
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Chemical Reactions and Equations Chapter wise important question for Class 10 Science PDF will help you in scoring more marks.. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter.
1.“We need to balance a skeltal chemical equation.” Give reason to justify the statement.
Answer. Skeltal chemical equation are unbalanced. We need to balance chemical equation because of law of conservation of mass. It states that ‘matter can neither be created nor be destroyed’. Therefore chemical equation must be balanced in each and every chemical reaction.
2.Giving an example list two information which make a chemical equation more useful (informative).
Answer.
(i) Physical state of reactants must be mentioned, e.g.
2H2 (g) + O2 (g)——– > 2H20 (l)
(ii) Condition in which reaction takes place are written on the arrow head, e.g.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-1
Consider the following chemical reaction
X + Barium chloride——–> Y + Sodium chloride
(White ppt)
(a) Identify ‘X’ and ‘Y’
(b) The type of reaction
(a) ‘X’ is Na2SO4 and Y is BaSO4.
(b) The type of reaction
Na2SO4 + BaCl2—–> BaSO4 + 2NaCl
(White ppt)
The reaction is precipitation reaction. It is also called double displacement reaction.
3. Name the reducing agent in the following reaction:
3MnO2 + 4Al———— > 3Mn + 2Al2O3
State which is more reactive, Mn or A1 and why?
Answer. ‘Al’ is reducing agent.
‘AT is more reactive than Mn v ‘Al’ displaces Mn from its oxide.
4. (i) Write a balanced chemical equation for process of photosynthesis.
(ii)When do desert plants take up carbon dioxide and perform photosynthesis?
Answer.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-2
(ii) In desert plants the stomata are open at night. They take CO2 at night and is stored in the form of acid and is used during day time for photosynthesis.
Name the reducing agent in the following reaction:
3MnO2 + 4Al———— > 3Mn + 2Al2O3
State which is more reactive, Mn or A1 and why?
Answer. ‘Al’ is reducing agent.
‘AT is more reactive than Mn v ‘Al’ displaces Mn from its oxide.
5.(i) Write a balanced chemical equation for process of photosynthesis.
(ii)When do desert plants take up carbon dioxide and perform photosynthesis?
Answer.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-2
(ii) In desert plants the stomata are open at night. They take CO2 at night and is stored in the form of acid and is used during day time.
I hope this helps.
Chemical Reactions and Equations Chapter wise important question for Class 10 Science PDF will help you in scoring more marks.. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter.
1.“We need to balance a skeltal chemical equation.” Give reason to justify the statement.
Answer. Skeltal chemical equation are unbalanced. We need to balance chemical equation because of law of conservation of mass. It states that ‘matter can neither be created nor be destroyed’. Therefore chemical equation must be balanced in each and every chemical reaction.
2.Giving an example list two information which make a chemical equation more useful (informative).
Answer.
(i) Physical state of reactants must be mentioned, e.g.
2H2 (g) + O2 (g)——– > 2H20 (l)
(ii) Condition in which reaction takes place are written on the arrow head, e.g.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-1
Consider the following chemical reaction
X + Barium chloride——–> Y + Sodium chloride
(White ppt)
(a) Identify ‘X’ and ‘Y’
(b) The type of reaction
(a) ‘X’ is Na2SO4 and Y is BaSO4.
(b) The type of reaction
Na2SO4 + BaCl2—–> BaSO4 + 2NaCl
(White ppt)
The reaction is precipitation reaction. It is also called double displacement reaction.
3. Name the reducing agent in the following reaction:
3MnO2 + 4Al———— > 3Mn + 2Al2O3
State which is more reactive, Mn or A1 and why?
Answer. ‘Al’ is reducing agent.
‘AT is more reactive than Mn v ‘Al’ displaces Mn from its oxide.
4. (i) Write a balanced chemical equation for process of photosynthesis.
(ii)When do desert plants take up carbon dioxide and perform photosynthesis?
Answer.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-2
(ii) In desert plants the stomata are open at night. They take CO2 at night and is stored in the form of acid and is used during day time for photosynthesis.
Name the reducing agent in the following reaction:
3MnO2 + 4Al———— > 3Mn + 2Al2O3
State which is more reactive, Mn or A1 and why?
Answer. ‘Al’ is reducing agent.
‘AT is more reactive than Mn v ‘Al’ displaces Mn from its oxide.
5.(i) Write a balanced chemical equation for process of photosynthesis.
(ii)When do desert plants take up carbon dioxide and perform photosynthesis?
Answer.
chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-2
(ii) In desert plants the stomata are open at night. They take CO2 at night and is stored in the form of acid and is used during day time.
I hope this helps.
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