11th Standard Chemistry English Medium Free Online Test Volume 2 One Mark Questions 2020

11th Standard

Reg.No. :
•
•
•
•
•
•

Chemistry

Time : 00:25:00 Hrs
Total Marks : 25

25 x 1 = 25
1. Which of the following is not a general characteristic of equilibrium involving physical process

(a)

Equilibrium is possible only in a closed system at a given temperature

(b)

The opposing processes occur at the same rate and there is a dynamic but stable condition

(c)

All the physical processes stop at equilibrium

(d)

All measurable properties of the system remains constant

2. $A+B\rightleftharpoons C+D,{ k }_{ c }$for this reaction is 10. If c 1, 2, 3, 4 mole/litre of A, B, C and D respectively are present in a container at 25°C, the direction of reaction will be

(a)

From left to right

(b)

From right to left

(c)

Reaction is at equilibrium

(d)

Unpredictable

3. H2 + S ⇌ H2S + energy. In this reversible reaction, select the factor which will shift the equilibrium to the right.

(a)

removing hydrogen sulphide gas

(b)

(c)

blocking hydrogen gas reaction

(d)

4. The KH for the solution of oxygen dissolved in water is 4 × 104 atm at a given temperature. If the partial pressure of oxygen in air is 0.4 atm, the mole fraction of oxygen in solution is

(a)

4.6 x 103

(b)

1.6 x 104

(c)

1 x 10-5

(d)

1 x 105

5. Statement I: Acetic acid deviates from ideal behaviour.
Statement II: Acetic acid exists as a dimer by forming inter molecular hydrogen bonds and hence deviates from Raoult's law.

(a)

Statement I& II are correct and II is the correct explanation of I.

(b)

Statement I& II are correct but II is not the correct explanation of I.

(c)

Statement I is true but II is wrong.

(d)

Statement I is wrong but II is correct.

6. The types of hybridiration on the five carbon atom from right to left in the, 2,3 pentadiene.

(a)

sp3, sp2, sp, sp2, sp3

(b)

sp3, sp, sp, sp, sp3

(c)

sp2, sp, sp2,sp2, sp3

(d)

sp3, sp3, sp2, sp3, sp3

7. The value of carbon-carbon single bond length is ________.

(a)

1.43 $\\ \\ \mathring { A }$

(b)

1.54 $\\ \\ \mathring { A }$

(c)

1.33 $\\ \\ \mathring { A }$

(d)

1.20 $\\ \\ \mathring { A }$

8. Which one of the following pair has T-shaped structure?

(a)

BrF3,CIF3

(b)

SF4,IF4+

(c)

PCl5,AsF5

(d)

NH3,PF3

9. The IUPAC name of the compound ${ H }_{ 3 }C-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -CH=C{ \left( { CH }_{ 3 } \right) }_{ 2 }$ is

(a)

2,4,4 – Trimethylpent -2-ene

(b)

2,4,4 – Trimethylpent -3-ene

(c)

2,2,4 – Trimethylpent -3-ene

(d)

2,2,4 – Trimethylpent -2-ene

10. Ortho and para-nitro phenol can be separated by

(a)

azeotropic distillation

(b)

destructive distillation

(c)

steam distillation

(d)

cannot be separated

11. IUPAC name of the compound $\underset { \underset { { CH }_{ 3 }{ H }_{ 5 } }{ | } }{ { H }_{ 3 }{ C }-{ CH }- } \underset { \underset { { C }_{ 2 }{ H }_{ 5 } }{ | } }{ CH } -CH_{ 3 }$

(a)

2,3 - Diethylbutane

(b)

2 - Ethyl - 3 - Methylpentane

(c)

2,3 - Dimethylbutane

(d)

3,4 - Dimethylhexane

12. Assertion (A): C2 Dr CI FI can farm 6 different geometrical isomers.
Reason (R):  Each one structure is geometrical isomer of other five structures.

(a)

Both A and Rare true and Ris correct explanation of A

(b)

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

(c)

A is true but R is false

(d)

Both A and R are false.

13. Which of the following is an example of non-benzenoid aromatic compound?

(a)

Toluene

(b)

Phenol

(c)

Benzyl alcohol

(d)

azulene

14. Which one of the following test is used to detect phosphorous in an organic compound?

(a)

Silver nitrate test

(b)

Copper oxide test

(c)

Ammonium molybdate test

(d)

Lassaigne's test

15. The most stable carbanion is

(a)

CH3-CH2

(b)

CH2=CH

(c)

CH≡ C

(d)

(CH3)2-CH

16. Assertion (A): ${ C }_{ 2 }{ H }_{ 3 }-\overset { + }{ C } H-{ C }_{ 2 }{ H }_{ 5 }$ is more stable than $C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }$
Reason (R): Positive inductive effective of C2H5- group is less than CH3- group.

(a)

Both A and Rare tnie and R is the correct explanation of A.

(b)

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

(c)

A is true but R is false.

(d)

Both A and R are false.

17. Statement-I: Homolytic cleavage is symmetrical one.
Statement-II: A single covalent bond breaks and each of the bonded atoms retains one electron.

(a)

Statement-I and II are correct and statement-II is correct explanation of statement-I.

(b)

Statement-land II are correct but statement-I! is not correct explanation of statement-I.

(c)

Statement-I is correct but statement-II is wrong.

(d)

Statement-I is wrong but statement-II is correct.

(a)

Benzoyl peroxide

(b)

Benzyl alcohol

(c)

Benzyl acetate

(d)

Benzaldehyde.

19. Which one of the following is not nucleophile?

(a)

H2O

(b)

NH3

(c)

R-OH

(d)

FeCl3

20. Statement-I: Fluoro acetic acid is stronger acid than acetic acid
Statement-II: Fluorine has high electronegativity and it is facilitate to dissociate the O-H bond easily.

(a)

Statement-I and II are correct and statement-II is correct explanation of statement-I.

(b)

Statement-I and II are correct but statement-II is not correct explanation of statement-I.

(c)

Statement-I is correct but statement-II is wrong

(d)

Statement-I is wrong but statement-II is correct

21. Bond angle in chair form of cyclohexane is

(a)

109°28'

(b)

120°

(c)

60°

(d)

108°

22. Identify the wrong statement in the following

(a)

The clean water would have a BOD value of more than 5 ppm

(b)

Greenhouse effect is also called as Global warming

(c)

Minute solid particles in air is known as particulate pollutants

(d)

Biosphere is the protective blanket of gases surrounding the earth

23. Identify the secondary pollutant among the following

(a)

CO

(b)

O3

(c)

Pb

(d)

CH4

24. Earth is protected from UV rays by

(a)

N2

(b)

O2

(c)

SO2

(d)

O3

25. Which of the following is/are correct match?
(i) Photochemical smog : SO2
(ii) Nitrate in drinking water : Blue baby syndrome
(iii) Phosphate fertilisers.in water : BOD level of water  increases.

(a)

only (i)

(b)

(i), and (ii)

(c)

(i), (ii) and (iii)

(d)

(i) and (iii)