Question

Q10 Assertion Plant tissues are mostly dead.
Reason: Dead tissues can provide mechanical strength and need less maintenance.
(a) i
(b) ii
(c) ini
-Q11. Assertion : Living organisms are composed of cells and products of cells
Reason. All cells arise from pre-existing cells.
(a) i
(b)

(d) iv
3Q12. Assertion- the acceleration produced by a force in the motion of a body depends only upon its
mass. Reason- larger is the mass of body, lesser will be the acceleration produced
(a) i
(b) ii
(c) iii
(d) iv
SQ13. Assertion: Sulphur is a polyatomic element.
Reason: Sulphur molecule consists of eight atoms of sulphur.
(a) i
(d) iv
*Q14. Assertion: If external force a body is zero, it's acceleration is zero.
Reason: This is the simple form of Newton's second law of motion.
(b) ii

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Answer 1

10.Both A and R are true and R is the correct explanation of A.

Since dead cells can provide mechanical strength as easily as live ones and need less maintenance, most of the cells in plant tissues are dead.

11.Both A and R are true and R is the correct explanation of A.

Because Virchow expanded Scheiden-Schwann cell theory and stated that all cells arise from pre-existing cells

12.Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

According to Newton's second law,

F=ma⇒a=F/m

For constant F, acceleration is inversely proportional to mass i.e. acceleration produced by a force depends only upon the mass of the body and for larger mass, acceleration will be less.

13. Both A and R are true but R is not the correct explanation of A.

By vaan der Waals law

14.Both A and R are true and R is the correct explanation of A.

by newton second law of motion which states f=ma

So if F=0,a=0

The reason is false as by newton second law F=ma

so acceleration depend on force.

Answer 2

The questions can be answered as follows;

Explanation:

• 10) The assertion and reason are correct and the reason is correct explanation of the assertion.
• 11) Both the assertion and the reason are correct but the reason is not the correct explanation of the assertion. Living organisms are made up of cells because cells are the building molecules for life.
• The assertion and reason both are false. Acceleration depends on velocity and time. Acceleration is directly proportional to velocity and inversely proportional to time.
• The assertion is false but the reason is correct. Sulphur is a monoatomic molecule. Sulphur is made up of 8 atoms, it is a octahedral molecule.