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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

2020

Q41
26. (b) Why are the traits acquired during the life time of an individual not inherited? Explain.

Solution

Q42
27. (a) A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.

Solution

Q43
27. (b) What are stomata? What governs the opening and closing of stomata?

Solution

Q44
27. (a) Draw a diagram of human alimentary canal and label - gall bladder, pancreas, liver and small intestine on it.

Solution

Q45
27. (b) Give two reasons to explain why absorption of digested food occurs mainly in the small intestine.

Solution

Q46
28. Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Wherein the reactivity series these metals are placed? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.

Solution

Q47
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(i) Which element will form only covalent compounds?

Solution

Q48
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(ii) Which element is a non-metal with valency 2?

Solution

Q49
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(iii) Which element is a metal with valency 2?

Solution

Q50
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(iv) Out of H, C and F which has largest atomic size?

Solution

Subjects

2020

Q41 26. (b) Why are the traits acquired during the life time of an individual not inherited? Explain.

Solution

Q42 27. (a) A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.

Solution

Q43 27. (b) What are stomata? What governs the opening and closing of stomata?

Solution

Q44 27. (a) Draw a diagram of human alimentary canal and label - gall bladder, pancreas, liver and small intestine on it.

Solution

Q45 27. (b) Give two reasons to explain why absorption of digested food occurs mainly in the small intestine.

Solution

Q46 28. Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Wherein the reactivity series these metals are placed? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.

Solution

Q47 29. The position of certain elements in the Modern Periodic Table are shown below. <p><img alt="" src=" " /></p> Using the above table answer the following question giving reason in each case: (i) Which element will form only covalent compounds?

Solution

Q48 29. The position of certain elements in the Modern Periodic Table are shown below. <p><img alt="" src=" " /></p> Using the above table answer the following question giving reason in each case: (ii) Which element is a non-metal with valency 2?

Solution

Q49 29. The position of certain elements in the Modern Periodic Table are shown below. <p><img alt="" src=" " /></p> Using the above table answer the following question giving reason in each case: (iii) Which element is a metal with valency 2?

Solution

Q50 29. The position of certain elements in the Modern Periodic Table are shown below. <p><img alt="" src=" " /></p> Using the above table answer the following question giving reason in each case: (iv) Out of H, C and F which has largest atomic size?

Solution

Subjects

Q41
26. (b) Why are the traits acquired during the life time of an individual not inherited? Explain.

Q42
27. (a) A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.

Q43
27. (b) What are stomata? What governs the opening and closing of stomata?

Q44
27. (a) Draw a diagram of human alimentary canal and label - gall bladder, pancreas, liver and small intestine on it.

Q45
27. (b) Give two reasons to explain why absorption of digested food occurs mainly in the small intestine.

Q46
28. Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Wherein the reactivity series these metals are placed? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.

Q47
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(i) Which element will form only covalent compounds?

Q48
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(ii) Which element is a non-metal with valency 2?

Q49
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(iii) Which element is a metal with valency 2?

Q50
29. The position of certain elements in the Modern Periodic Table are shown below.
<p><img alt="" src=" " /></p>
Using the above table answer the following question giving reason in each case:
(iv) Out of H, C and F which has largest atomic size?