KVPY Stream-SA (Class 11) Chemistry: Questions 125 - 127 of 133

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Question number: 125

» Basic Concepts in Chemistry » Concept of Atom, Molecule, Element and Compound

Appeared in Year: 2013

MCQ▾

Question

The pair of atoms having the same number of neutrons is

Choices

Choice (4) Response

a.

2311Na3919K

b.

126C2412Mg

c.

2311Na2412Mg

d.

2311Na199F

Question number: 126

» Organic Compounds With Halogens » Mechanisms of Substitution Reactions

Appeared in Year: 2011

MCQ▾

Question

The major product formed in the reaction is

A reaction of benzene with Br, I and Cl

A Reaction of Benzene With Br, I and Cl

Complete the procedure of reaction of benzene with Br, I and Cl and NaCN, DMSO and Heat.

(I)

Completed reaction of benzene with Br, I and Cl choice -A

Completed Reaction of Benzene With Br, I and Cl Choice -A

Find the right completed reaction of benzene with Br, I and Cl and NaCN, DMSO and Heat

(II)

 Completed reaction of benzene with Br, I and Cchoice-B

Completed Reaction of Benzene With Br, I and Cchoice-B

Find the right completed reaction of benzene with Br, I and Cl and NaCN, DMSO and Heat

(III)

Completed reaction of benzene with Br, I and Cl choice -C

Completed Reaction of Benzene With Br, I and Cl Choice -C

Find the right completed reaction of benzene with Br, I and Cl and NaCN, DMSO and Heat

(IV)

Completed reaction of benzene with Br, I and Cl

Completed Reaction of Benzene With Br, I and Cl

Find the right completed reaction of benzene with Br, I and Cl and NaCN, DMSO and Heat

Choices

Choice (4) Response

a.

I

b.

IV

c.

II

d.

III

Question number: 127

» Solutions » Methods for Concentration of Solution

MCQ▾

Question

In the given set of reactions what is the ratio of equivalent weights of HNO3 .

(a) 5Cu+2HNO35CuO+N2+H2O

(b) NaOH+HNO3NaNO3+H2O

Choices

Choice (4) Response

a.

4: 5

b.

3: 5

c.

2: 5

d.

1: 5

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