#### 11th Standard Chemistry English Medium Free Online Test Volume 1 One Mark Questions 2020

11th Standard

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Chemistry

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

25 x 1 = 25
1. Assertion: Two mole of glucose contains 12.044 x 1023 molecules of glucose
Reason: Total number of entities present in one mole of any substance is equal to 6.02 x 1022

(a)

both assertion and reason are true and the reason is the correct explanation of assertion

(b)

both assertion and reason are true but the reason is not the correct explanation of assertion

(c)

an assertion is true but reason is false

(d)

both assertion and reason are false

2. The change in the oxidation number of S in H2S and SO2,in the following industrial reaction:
2H2S(g) + SO2(g) $\longrightarrow$ 3S(s) + H2O(g)

(a)

-2 to 0, +4 to 0

(b)

-2 to 0, +4 to -1

(c)

-2 to -1, +4 to 0

(d)

-2 to -1, +4 to -2

3. Which form of based on physical characteristics possess neither definite volume nor definite shape?

(a)

Solids

(b)

Liquids

(c)

Gases

(d)

Both (a) and (b)

4. If a beaker holds 576g of water, what will be the gram molecules of water in that beaker?

(a)

23 gram molecule

(b)

23%

(c)

32%

(d)

32 gram molecule

5. Match the list-I with list-II and select the correct answer using the code given below the lists

 List-I List-II A Molecular formula 1 Completely consumed B Stoichiometric Equation 2 Left unreacted C Limiting reagent 3 n x Empirical formula D Excess reagent 4 Balanced equation
(a)
 A B C D 3 4 2 1
(b)
 A B C D 3 4 1 2
(c)
 A B C D 4 3 1 2
(d)
 A B C D 4 3 1 2
6. Oxidation number of Fluorine in all compounds is:

(a)

+1

(b)

-1

(c)

0

(d)

-2

7. Which one of the following is not a redox reaction?

(a)

Rusting of iron

(b)

Extraction of metal Na

(c)

Electroplating

(d)

Aluminothermic process

8. How many molecules are present in 32 g of methane?

(a)

2 x 6.023 x 1023

(b)

6.023 x 1023/2

(c)

6.023 x 10-23

(d)

3.011 x 1023

9. For d-electron, the orbital angular momentum is

(a)

$\frac { \sqrt { 2 } h }{ 2\pi }$

(b)

$\\ \frac { \sqrt { 2h } }{ 2\pi }$

(c)

$\frac { \sqrt { 2\times 4 } h }{ 2\pi }$

(d)

$\frac { \sqrt { 2\times 4 } h }{ 2\pi }$

10. Match the list I with List II and select the correct answer using the code given below the list

 List I List II A p orbital 1 Clover leaf B s orbital 2 Dumb bell with doughnut C dz2 3 Dumb bell D dxy 4 Spherical
(a)
 A B C D 1 3 2 4
(b)
 A B C D 4 3 1 2
(c)
 A B C D 4 4 2 1
(d)
 A B C D 2 1 4 3
11. In Rutherford's gold foil experiment, a thin gold foil was bombarded with a stream of fast moving

(a)

B particles

(b)

$\alpha$-particles

(c)

$\gamma$ particles

(d)

$\delta$ particles

12. The effect which represents the splitting of spectral lines by external electric field is______

(a)

Stark effect

(b)

Zeeman effect

(c)

Raman effect

(d)

None of these

13. The energy associated with the first orbit of He+ ion is:

(a)

-8.72 x 1018 J

(b)

8.78 x 1018 J

(c)

8.78 x 10-17

(d)

-8.72 x 10-17 J

14. The value of n, I, m and s of 8th electron in an oxygen atom are respectively____________.

(a)

$1,0,0,+\frac{1}{2}$

(b)

$2,1,+1,-\frac{1}{2}$

(c)

$2,1,-1,-\frac{1}{2}$

(d)

$2,1,0,+\frac{1}{2}$

15. de Broglie equation is______.

(a)

$\lambda=\frac{h}{mv}$

(b)

$\lambda=\frac{hv}{m}$

(c)

$\lambda=\frac{mv}{h}$

(d)

$\lambda=hmv$

16. Match the list I with list II and select the correct answer using the code given below the list.

 List I List II A de Chancourtois 1 Addition of synthetic elements. B Moseley 2 first periodic law C Newland 3 Modem periodic law D Glenn seaborg 4 Law of octaves
(a)
 A B C D 1 2 3 4
(b)
 A B C D 3 2 4 1
(c)
 A B C D 2 3 4 1
(d)
 A B C D 2 3 1 4
17. Pd has exceptional electronic configuration of 4d10 5s0 It belongs to period ______ and group _____

(a)

4, 11

(b)

5, 10

(c)

6, 9

(d)

3, 16

18. Excluding hydrogen and helium, the smallest element in the periodic table is _____

(a)

Lithium

(b)

Oxygen

(c)

Fluorine

(d)

Chlorine

19. Pick the metalloid among the following elements

(a)

P

(b)

S

(c)

Si

(d)

Al

20. The ionic radii (in A) of N-3, 0-2 and P- are respectively:

(a)

1.71, 1.40 and 1.36

(b)

1.71, 1.36 and 1.40

(c)

1.36, 1.40 and 1.71

(d)

1.36, 1.71 and 1.40

21. According to modern periodic law, the physical and chemical properties of the elements are periodic functions of their_______

(a)

atomic volume

(b)

atomic numbers

(c)

atotnic weights

(d)

valency

22. Which one of the following arrangements represent the correct order of least negative to most negative electron gain enthalpy

(a)

Al < O < C < Ca < F

(b)

Al < Ca < O < C < F

(c)

C < F < O < Al < Ca

(d)

Ca < Al < C < O < F

23. The hardness of water can be determined by volumetrically using the reagent

(a)

sodium thio sulphate

(b)

potassium permanganate

(c)

hydrogen peroxide

(d)

EDTA

24. In case of alkali metal halides, the ionic character increases in the order

(a)

MF < MCI < MBr < MI

(b)

MI < MBr < MCI < MF

(c)

MI < MBr<MF < MCI

(d)

none of these

25. What is the density of N2 gas at 227o C and 5.00 atm pressure? (R=0.082 L atm K-1 mol-1 )

(a)

1.40 g/L

(b)

2.81 g/L

(c)

3.41 g/L

(d)

0.29 g/L