If a wire is stretched such that its length becomes double then

Young's modulus of wire is equal to twice of stress

Young's modulus of wire is equal to stress

A metal wire of length L is suspended vertically from a rigid support. When a body of mass M is attached to the lower end of wire, the elongation of the wire is , then the incorrect statement is

Elastic potential energy stored in the wire is

The loss in gravitational potential energy of mass M is Mg

The elastic potential energy in the wire is Mg

Directions: Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below. Assertion: Frictional forces are conservating forces. Reason: Potential energy can be associated with frictional forces.

Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Assertion is correct, reason is correct; reason is not a correct explanation for assertion

Assertion is correct, reason is incorrect

Assertion is incorrect, reason is correct.

Match the enzymes given in Column I with the reactions they catalyse given in Column II. Select the correct option.

(a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)

(a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)

(a) - (ii), (b) - (i), (c) - (iii), (d) - (iv)

(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)

Choose the incorrect match.

BrF 5 - F-Br-F bond angles are of 90°

PBr 5(Solid) - Cationic moiety contains all the P-Br bonds of equal bond length

- d-orbitals are involved in formation of all the three π-bonds

Which of the following is correct about a plant which has a good level of abscisic acid?

Ageing in leaves will be delayed.

Which of the following structures give rise to the female gametophyte in angiosperms?

Female gametophyte and megaspore

Megaspore mother cell and megaspore

Nucellus and megaspore mother cell (MMC)

Nucellus and female gametophyte

Which of the following characteristics of fungi differentiates them from algae?

The reserved food is in the form of starch.

Cell wall in most of the fungi is made up of chitin.

Match the following columns and select the correct option.

(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

(a) - (i), (b) - (ii), (c) - (iv), (d) - (iii)

(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following. Assertion : Sunflower and Rose are bisexual flowers. Reason : Flowers in which, the thalamus grows around the ovary fusing with its wall are called epigynous flowers.

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

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

Read the following statements and choose the correct option A. Agrobacterium tumefaciens, a pathogen of several dicot plants, is able to deliver a piece of DNA known as ‘T-DNA’ into plant host cells, transforming them. B. Non disarmed retroviruses are used to deliver desirable genes into animal cells.

Statement A is correct while statement B is incorrect

Statement A is incorrect while statement B is correct

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