p Block Elements Online Mock Test 1

1. Among the halogen acids, the weakest acid is

HI
HBr
HCl
HF

2. An element is burnt in limited supply of air to give an oxide A, which on treatment with water gives an acid B. Acid B on heating gives acid C which gives yellow precipitate with silver nitrate solution. Oxide A is

P2O3
SO2
CO2
NO2


3. An element which belongs to group 14 is soft in nature, does not react with pure water, but dissolves in water containing dissolved air. Then the element is

C
Ge
Pb
Ti

4. Inert gas used in beacon lights for safety of air navigation is

Helium
Argon
Neon
Xenon

5. The compound used as smoke screen is

PCl3
PCl5
PH3
H3PO3

6. The compound used to arrest the bleeding is

K2SO4
Potash alum
Al2(SO4)3
KI

7. The compound with garlic odour is

P2O3
P2O5
H3PO3
H3PO4

8. The compound with garlic taste is

H3PO4
H3PO3
P2O3
P2O5

9. The general electronic configuration of carbon family is

ns2np2
ns2np3
ns2np1
ns2np4

10. The lightest gas which is non-inflammable is

He
H2
N2
Ar

11. The metalloid among the following is

Pb
P
Ge
Sn

12. The noble gases are unreactive because they

have same number of electrons
have an atomicity of one
are gases with low density
have stable electronic configuration

13. The shape of PCl5 is

Bipyramidal
Trigonal bipyramidal
Linear
Tetrahedral

14. The shape of XeF4 is

Tetrahedral
Octahedral
Square planar
Pyramidal

15. The toxic element of Boron family is

Boron
Indium
Thallium
Gallium

16. Which of the following does not belong to group 13?

B
Al
Ge
In

17. Which of the following does not belong to group 14?

C
Si
Ga
Pb

18. Which of the following has the property of etching on glass?

HI
HF
HBr
HCl

19. Which of the following shows negative (–1) oxidation state only?

Br
F
Cl
I

20. Which of the following is most abundant in earth’s crust?

C
Si
Ge
Sn

21. Which of the following is the second most abundant element in earth’s crust?

Carbon
Silicon
Germanium
Tin

22. Halogens belong to the group number

14
15
17
18

23. Which is not known?

XeF6
XeF4
XeO3
ArF6

24. Which of the following has highest first ionisation energy?

He
Ne
Ar
Kr

25. Which has the least melting point?

B
Al
Ga
In

26. One can draw the map of building on a glass plate by

HI
HF
HBr
HCl

27. Without lone pair of electrons in AX3 type of interhalogen compounds, its shaped is

trigonal bipyramidal
tetrahedral
T – shaped
square planar

28. The metal which exist as a liquid at room temperature is

Germanium
Indium
Gallium
Thallium

29. The compound employed to arrest the bleeding is

K2SO4.Al2(SO4)3.4Al(OH)3
K2SO4.Al2(SO4)3.24Al(OH)3
K2SO4.Al2(SO4)3.4H2O
K2SO4.Al2(SO4)3.24H2O

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