KVPY Stream SB-SX (Class 12 & 1st Year BSC) Chemistry: Questions 19 - 23 of 269

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 269 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 19

» Chemical Bonding » Covalent Bonding » Electron Pair Repulsion (VSEPR) Theory

Appeared in Year: 2015

MCQ▾

Question

The H-C-H, H-N-H, and H-O-H bond angel and (in degrees) in methane, ammonia and water are respectively, closest to

Choices

Choice (4) Response
a.

109.5, 104.5, 107.1

b.

107.1, 104.5, 109.5

c.

104.5, 107.1, 109.5

d.

109.5, 107.1, 104.5

Question number: 20

» P-Block Elements Group 13 to 18 » Group 13 » Boron

Appeared in Year: 2013

MCQ▾

Question

Hydrolysis of BCl3 gives X which on treatment with sodium carbonate produced Y. X and Y respectively are

Choices

Choice (4) Response
a.

H3BO3andNa2B4O7

b.

H3BO3andNaBO2

c.

B2O3andNaBO2

d.

B2O3andNa2B4O7

Question number: 21

» States of Matter » Solid State » Imperfection in Solids

Appeared in Year: 2015

MCQ▾

Question

Schottky defect in a crystal arises due to

Choices

Choice (4) Response
a.

Migration of cations to interstitial voids

b.

Migration of anions interstitial voids

c.

Creation of equal number of cation & anion vacancies

d.

Creation of unequal number of cation & anion vacancies

Question number: 22

» Redox Reactions & Electrochemistry » Balancing of Redox Reactions

Appeared in Year: 2014

MCQ▾

Question

The number of moles of KMnO4 required oxidase one equivalent of KI in the presence sulfuric acid is:

Choices

Choice (4) Response
a.

12

b.

2

c.

15

d.

5

Question number: 23

» Chemical Kinetics » Arrhenius Theory

Appeared in Year: 2015

MCQ▾

Question

The rate constant of a chemical reaction at a very high temperature will approach-

Choices

Choice (4) Response
a.

Activation energy divided by the ideal gap constant.

b.

Activation energy

c.

Arrhenius Frequency factor

d.

Arrhenius frequency factor divided by the ideal gap constant

Sign In