Sample Paper Set II For 11th And 12th

1. Which of the following option is incorrect regarding

?

P–Cl bond length is less than P–F bond length.

Cl – – Cl bond angle is less than Cl – – F bond angle.

Its dipole moment is zero

Explanation

2. Aspartame, an artificial sweetener contains 9.52 wt. % nitrogen. There are two nitrogen atoms per molecule. What is the molecular weight of aspartame?

147

294

588

266

Molecular weight of aspartame =

Explanation

Molecular weight of aspartame =

3. The displacement of a particle executing simple harmonic motion varies with time t as

The amplitude of oscillation is :

A

2 a

Explanation

4. Find the electric field due to three concentric thin long cylinders of linear charge densities –

, +2

and

just outside the outer cylinder.

None of these

Explanation

5. Reactivity of carbonyl compound towards NAR is-

III > I > II

III > II > I

I > II > III

I > III > II

The reactivity of carbonyl compounds towards NAR (nucleophilic addition reaction) is determined by the nature of the carbonyl group. In this case, the correct answer is I > II > III, which means that carbonyl compound I is the most reactive towards NAR, followed by compound II, and then compound III. This suggests that carbonyl compound I has a more electrophilic carbonyl group, making it more susceptible to nucleophilic attack compared to compound II and compound III.

Explanation

The reactivity of carbonyl compounds towards NAR (nucleophilic addition reaction) is determined by the nature of the carbonyl group. In this case, the correct answer is I > II > III, which means that carbonyl compound I is the most reactive towards NAR, followed by compound II, and then compound III. This suggests that carbonyl compound I has a more electrophilic carbonyl group, making it more susceptible to nucleophilic attack compared to compound II and compound III.

6. Which of the following will have positively charged particles in dispersed phase?

Sol

Milk

Blood

Gold sol

Blood is positively charged colloid

Explanation

Blood is positively charged colloid

7. An infinite number of charges, equal to q, are placed along the x-axis at x = 1, x = 2, x = 4, x = 8 .... and so on.The electric potential at the point x = 0 due to this set of charges is :

The potential at x = 0 due to a set of infinite number of charges placed on the x-axis as shown in figure, is

Explanation

The potential at x = 0 due to a set of infinite number of charges placed on the x-axis as shown in figure, is

8.

1

–1

Explanation

9.

1

2

3

4

Explanation

10. The ratio of total number of

bond to the total number of

bond in anhydride of

4

2

3

8

Explanation

11. There exists a natural number N which is 50 times its own logarithm to the base 10, then number of digits in N is

1

2

3

4

Explanation

12. A hollow metal sphere is charged such that the potential at its centre is V. The potential on the surface of the sphere is :

Zero

V

More than V

Less than V

The potential inside a spherical conductor is constant including that on its surface.

Explanation

The potential inside a spherical conductor is constant including that on its surface.

13. A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to :

+

Refer to figure. The three charges will be in equilibrium if no net force acts on each charge.

Charge q is in equilibrium because the forces acting on it by charge Q at A and charge Q at

B are equal and opposite. Charge Q at A will be in equilibrium if

Explanation

Refer to figure. The three charges will be in equilibrium if no net force acts on each charge.

Charge q is in equilibrium because the forces acting on it by charge Q at A and charge Q at

B are equal and opposite. Charge Q at A will be in equilibrium if

14. The values of cos

0

Explanation

15. Consider the function f(x) =

Statement-1: f '(

) = 0. Statement-2: f(c) =

Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement- 1

Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.

Statement-1 is true, statement-2 is false.

Statement-1 is false, statement-2 is true.

Statement-1 states that the derivative of the function f(x) is equal to 0. This means that the function f(x) has a critical point or a stationary point at x=c, where the derivative is equal to 0.

Statement-2 is not a complete statement as it does not provide any information about the function f(x) at x=c. Without knowing the value of f(c), we cannot determine if statement-2 is a correct explanation for statement-1. Therefore, statement-2 is false.

Explanation

Statement-1 states that the derivative of the function f(x) is equal to 0. This means that the function f(x) has a critical point or a stationary point at x=c, where the derivative is equal to 0.

Statement-2 is not a complete statement as it does not provide any information about the function f(x) at x=c. Without knowing the value of f(c), we cannot determine if statement-2 is a correct explanation for statement-1. Therefore, statement-2 is false.