# Sample Paper Set II For 11th And 12th

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Question No: 1-5 (Physics)
Question No: 6-10 (Chemistry)
Question No: 11-15 (Mathematics)

• 1.

### 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 :

B.
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

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• 2.

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

• A.

Zero

• B.

V

• C.

More than V

• D.

Less than V

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

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• 3.

### 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 :

B.
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

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• 4.

• A.

A

• B.
• C.
• D.

2 a

C.
• 5.

### Find the electric field due to three concentric thin long cylinders of linear charge densities –, +2 and just outside the outer cylinder.

• A.
• B.
• C.
• D.

None of these

C.
• 6.

### Reactivity of carbonyl compound towards NAR is-

• A.

III > I > II

• B.

III > II > I

• C.

I > II > III

• D.

I > III > II

C. I > II > 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.

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• 7.

• A.

4

• B.

2

• C.

3

• D.

8

A. 4
• 8.

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

• A.

sol

• B.

Milk

• C.

Blood

• D.

Gold sol

C. Blood
Explanation
Blood is positively charged colloid

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• 9.

### Which of the following option is incorrect regarding ?

• A.
• B.

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

• C.

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

• D.

Its dipole moment is zero

C. Cl – – Cl bond angle is less than Cl – – F bond angle.
• 10.

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

• A.

147

• B.

294

• C.

588

• D.

266

B. 294
Explanation
Molecular weight of aspartame =

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• 11.

• A.

1

• B.

2

• C.

3

• D.

4

C. 3
• 12.
• A.

1

• B.

–1

• C.
• D.
D.
• 13.

• A.

0

• B.
• C.
• D.
A. 0
• 14.
• A.

1

• B.

2

• C.

3

• D.

4

C. 3
• 15.

### Consider the function f(x) = Statement-1: f '() = 0. Statement-2: f(c) =

• A.

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

• B.

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

• C.

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

• D.

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

C. Statement-1 is true, 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.

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• Current Version
• Mar 14, 2023
Quiz Edited by
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• Jan 15, 2014
Quiz Created by
Tanmay Shankar

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