#### 11th Standard Chemistry English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Three

11th Standard

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Chemistry

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

10 x 1 = 10
1. The oxidation number of Cr in Cr2O72- __________ is

(a)

+6

(b)

-6

(c)

+7

(d)

-7

2. The value of Avogadro Number N is equal to

(a)

2.24 x 10-2L

(b)

22400 cm-3

(c)

6.023 x 10-23

(d)

6.023 x 1023

3. The radius of which of the following is same as that of the first Bohr orbit of hydrogen atom?

(a)

He+ (n = 2)

(b)

Li+2 (n = 2)

(c)

Li-2 (n = 3)

(d)

Be+3 (n = 2)

4. The element with atomic number 31 belongs to _____

(a)

s-block

(b)

p-block

(c)

d-block

(d)

f-block

5. Hydrogen accepts an electron to attain the inert gas configuration. In this way it resembles __________

(a)

chalcogens

(b)

halogens

(c)

transition metals

(d)

alkali metals

6. Which metal does not liberate H2 gas from dilute aqueous hydrochloric acid at 298 K?

(a)

Mg

(b)

Zn

(c)

Al

(d)

Cu

7. Consider the following statements.
(i) Lithium does not have d-orbitals.
(ii) Lithium carbonate is more soluble than sodium carbonate in water.
(iii) The second ionization enthalpy of alkali metals are zero.
Which of the above statements is/are not correct?

(a)

(i) only

(b)

(ii) only

(c)

(ii) and (iii)

(d)

(i), (ii) and (iii)

8. 273K is equal to ______________ degree centigrade.

(a)

0

(b)

100

(c)

373

(d)

1

9. Consider the following statements.
(i) All the gases have higher densities than liquids and solids.
(ii) All gases occupy zero volume at absolute zero.
(iii) At very low pressure all gases exhibit ideal behaviour.
Which of the above statement is/are not correct?

(a)

(i) only

(b)

(ii) only

(c)

(iii) only

(d)

(ii) and (iii) only

10. For the reaction, X2 O4(l) $\rightarrow$ 2 XO2 (g), $\Delta$U=2.1 Kcal, $\Delta$S = 20 cal K-1 at 300 K. Hence,$\Delta$G is:

(a)

2.7 Kcal

(b)

-2.7 Kcal

(c)

9.3 K.=cal

(d)

-9.3 Kcal