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Class 6	Science Mathematics Social Science	English Hindi Computer
Class 7	Science Mathematics Social Science	English Hindi Computer
Class 8	Science Mathematics Social Science	English Hindi Computer
Class 9	Science Mathematics Social Science	English Hindi Computer
Class 10	Science Math Social Science	English Hindi Computer
Class 11	Physics Chemistry Biology	Mathematics English Economics
Class 12	Physics Chemistry Biology	Mathematics English Economics
Class 5	EVS
College Entrance	Jamia Millia Islamia Aligarh Muslim University Banaras Hindu University

2019

Q11
2g of silver chloride is taken in a china dish and the china dish is placed in sunlight for sometime. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

Solution

Q12
Identify the type of reactions taking place in each of the following cases and write the balanced chemical equation for the reactions.
(a) Zinc reacts with silver nitrate to produce zinc nitrate and silver.

Solution

Q13
Define the term transpiration. Design an experiment of demonstrating this process.

Solution

Q14
What is the feedback mechanism of Harmonic regulation? Take the example of insulin to explain this phenomenon.

Solution

Q15
What are plant hormones? Name the plant hormones responsible for the following:
(i) Growth of stem
(ii) Promotion of cell division
(iii) Inhibition of growth
(iv) Elongation of cells

Solution

Solution

Q17
Why should there be an equitable distribution of resources? List three forces that would be working against an equitable distribution of our resources.

Solution

Q18
How can we help in reducing the problems of waste disposal? Suggest any three methods.

Solution

Q19
Define an ecosystem. Draw a block diagram to show the flow of energy in an ecosystem.

Solution

Q20
What is rainbow? Draw a labelled diagram to show the formation of a rainbow.

Solution

Subjects

2019

Q11 2g of silver chloride is taken in a china dish and the china dish is placed in sunlight for sometime. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

Solution

Q12 Identify the type of reactions taking place in each of the following cases and write the balanced chemical equation for the reactions. (a) Zinc reacts with silver nitrate to produce zinc nitrate and silver.

Solution

Q13 Define the term transpiration. Design an experiment of demonstrating this process.

Solution

Q14 What is the feedback mechanism of Harmonic regulation? Take the example of insulin to explain this phenomenon.

Solution

Q15 What are plant hormones? Name the plant hormones responsible for the following: (i) Growth of stem (ii) Promotion of cell division (iii) Inhibition of growth (iv) Elongation of cells

Solution

Solution

Q17 Why should there be an equitable distribution of resources? List three forces that would be working against an equitable distribution of our resources.

Solution

Q18 How can we help in reducing the problems of waste disposal? Suggest any three methods.

Solution

Q19 Define an ecosystem. Draw a block diagram to show the flow of energy in an ecosystem.

Solution

Q20 What is rainbow? Draw a labelled diagram to show the formation of a rainbow.

Solution

Subjects

Q11
2g of silver chloride is taken in a china dish and the china dish is placed in sunlight for sometime. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

Q12
Identify the type of reactions taking place in each of the following cases and write the balanced chemical equation for the reactions.
(a) Zinc reacts with silver nitrate to produce zinc nitrate and silver.

Q13
Define the term transpiration. Design an experiment of demonstrating this process.

Q14
What is the feedback mechanism of Harmonic regulation? Take the example of insulin to explain this phenomenon.

Q15
What are plant hormones? Name the plant hormones responsible for the following:
(i) Growth of stem
(ii) Promotion of cell division
(iii) Inhibition of growth
(iv) Elongation of cells

Q17
Why should there be an equitable distribution of resources? List three forces that would be working against an equitable distribution of our resources.

Q18
How can we help in reducing the problems of waste disposal? Suggest any three methods.

Q19
Define an ecosystem. Draw a block diagram to show the flow of energy in an ecosystem.

Q20
What is rainbow? Draw a labelled diagram to show the formation of a rainbow.