Question

Q13. Assertion (A): If the cells of onion peel and RBCs are separately kept in hypotonic solution, both the
cells will swell. RDC will burst easily while cells of onion peel will resist the bursting to some extent.
Reason (R): Onion peel being a plant cell, has cell wall while RBC do not have cell wall. Thus RBC will
burst as there is no mechanism to restrict the entry of water into them. But due to presence of cell
wall onion peel will not burst. The cell wall is rigid and prevents the entry of water into cell.
1) Both A and R are correct and R is correct explanation of the assertion.
) Both A and Rare true but is not the correct explanation of the assertion.
i) Ais true but R is false.
IV) Both A and Rare false.
Q14. An atom of an element is represented as "OX
How many electrons and neutrons are present in this atom?
OR
Gaurav during his visit to a museum that some specimens and articles were more than thousand
year old. He inquired his accompanying elder brother that how could their age could be determined.
Gaurav's brother explained him the radiocarbon dating technique and its usefulness in
determination of age of very old articles.
Read the above passage and answer the following questions:
1) Which Isotope help in determination of age of an antique items?
II) Write number of neutrons present in atom of that isotop.​

Answer 1

Answer:

1 option is correct

Explanation:

the assertion and reason both are true

Answer 2

Assertion and Reason both are correct