#### 11th Standard Chemistry English Medium Free Online Test Creative 1 Mark Questions

11th Standard

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Chemistry

Time : 00:10:00 Hrs
Total Marks : 10

10 x 1 = 10
1. The oxidation state of a element in its uncombined state is

(a)

zero

(b)

+1

(c)

-1

(d)

none

2. The electronic configuration of Eu (Atomic no. 63) Gd (Atomic no. 64) and Tb (Atomic no. 65) are

(a)

[Xe] 4f6 5d' 6s2, [Xe] 4f7 Sd1 6s2 and [Xe] 4f8  5d1 6s2

(b)

[Xe] 4f7 , 6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9 6s2

(c)

[Xe] 4f7 ,6s2, [Xe] 4f7 6s2 and [Xe] 4f7 5d1 6s2

(d)

[Xe] 4fSd1 6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9 6s2

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

 List I List II A A halogen 1 Cesium B An alkali metal 2 Germanium C A chalcogen 3 Iodine D A metalloid 4 Selenium
(a)
 A B C D 1 3 2 4
(b)
 A B C D 4 3 1 2
(c)
 A B C D 3 1 4 2
(d)
 A B C D 2 1 4 3
4. The most abundant element in the universe is _________.

(a)

aluminium

(b)

mica

(c)

dihydrogen

(d)

nitrogen

5. Potassium chloride is used as

(a)

fertilizer

(b)

soft soap

(c)

electrochemical cells

(d)

all the above

6. At identical temperature and pressure, the rate of diffusion of hydrogen gas is 3$\sqrt { 3 }$ times that of a hydrocarbon having molecular formula CnH2n-2. What is the value of n ?

(a)

8

(b)

4

(c)

3

(d)

1

7. Which of the following is the correct mathematical relation for Charles' law at constant pressure?

(a)

$V\propto T$

(b)

$V\propto t$

(c)

$V\propto \frac{1}{T}$

(d)

all of above

8. Statement-I: The pressure cooker takes more time for cooking at high altitude.
Statement-II: Air is subjected to Earth's gravitational force. The pressure of air gradually decreases from the surface of the Earth to higher altitude.

(a)

Statement-I and II are correct and Statement-II is the correct explanation of Statement-I

(b)

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

(c)

Statement-I is wrong but Statement-II is correct

(d)

Statement-I is correct but Statement-II is wrong

9. Statement-I: Gases do not liquefy above their critical temperature, even on applying high pressure.
Statement-II: Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

(a)

Statement-I and II are correct and Statement-II is the correct explanation of Statement-I

(b)

Statement-I and II are correct but Statement-Il is not the correct explanation of Statement-I

(c)

Statement-I is correct but Statement-Il is wrong

(d)

Statement-I is wrong but Statement-Il is correct

10. The heat absorbed at constant volume is equal to the system's change in:

(a)

enthalpy

(b)

entropy

(c)

internal energy

(d)

free energy