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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

2015

Q1
Write the name and formula of the 2nd member of homologous series having general formula CₙH₂ₙ.

Solution

Q2
What is speciation?

Solution

Q3
Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?

Solution

Q4
List four specific characteristics of the images of the objects formed by convex mirrors.

Solution

Q5
List two advantages associated with water harvesting at the community level.

Solution

Q6
Everyone of us can do something to reduce our personal consumption of various natural resources. List four such activities based on 3-R approach.

Solution

Q7
Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of cone. H2S04. Also write chemical equation for the reaction stating the role of cone. H2S04 in it.

Solution

Q8
Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.

Solution

Solution

Q10
Name the parts A, B and C shown in the diagram and write their
<img src="" alt="">

Solution

Subjects

2015

Q1 Write the name and formula of the 2nd member of homologous series having general formula CₙH₂ₙ.

Solution

Q2 What is speciation?

Solution

Q3 Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?

Solution

Q4 List four specific characteristics of the images of the objects formed by convex mirrors.

Solution

Q5 List two advantages associated with water harvesting at the community level.

Solution

Q6 Everyone of us can do something to reduce our personal consumption of various natural resources. List four such activities based on 3-R approach.

Solution

Q7 Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of cone. H2S04. Also write chemical equation for the reaction stating the role of cone. H2S04 in it.

Solution

Q8 Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.

Solution

Solution

Q10 Name the parts A, B and C shown in the diagram and write their <img src="" alt="">

Solution

Subjects

Q1
Write the name and formula of the 2nd member of homologous series having general formula CₙH₂ₙ.

Q2
What is speciation?

Q3
Why should biodegradable and non-biodegradable wastes be discarded in two separate dustbins?

Q4
List four specific characteristics of the images of the objects formed by convex mirrors.

Q5
List two advantages associated with water harvesting at the community level.

Q6
Everyone of us can do something to reduce our personal consumption of various natural resources. List four such activities based on 3-R approach.

Q7
Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of cone. H2S04. Also write chemical equation for the reaction stating the role of cone. H2S04 in it.

Q8
Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.

Q10
Name the parts A, B and C shown in the diagram and write their
<img src="" alt="">