Assertion: Tapetal cells usually possess dense cytoplasm and never more than one nucleus.
Reason: Tapetal cells undergo mitosis which generally involves division of nucleus but cytokinesis does not happen.

Q. Assertion- pH of the stomach is more than 7.
Reason- Stomach contains oxyntic cells that produce HCl.

Q. Assertion :Sulphuric acid is more viscous than water. Reason: Concentrated sulphuric acid has a great affinity for water.

Q.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q.

Assertion: Apical meristems help in primary growth of the plant.​

Reason: Rapid cell division in the apical meristems lead to the increase in length of roots and shoots.​

a) Both Assertion and Reason are correct, and Reason is the correct explanation to the Assertion​
b) Both Assertion and Reason are correct, and Reason is the incorrect explanation to the Assertion​
c) Assertion is correct Reason is incorrect​
d) Both Assertion and Reason are incorrect​

Q.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.