Chemistry Chapter 4 FSC 2nd year
Chapter= Group V-A and VI-A Elements
1.
Which one of the following is a white waxy solid
with garlic like odour?
a.
P2O3 b. P2O5
c. PCl5
d.
H3PO3
2.
Arsenic and antimony have
a.
Metallic character b.
Non – metallic character
c.
Both a & b d.
None of them
3.
Nitrogen and phosphorus give
a.
Basic oxide b.
Acidic oxide c. Amphoteric oxide d. None
of them
4.
How much volume of nitrogen is present in air?
a.
78% b.
79% c. 76% d.
77%
5.
What is the chemical formula of nitric
anhydride?
a.
N2O3 b. N2O5 c. NO d.
NO2
6.
What is produced by the action of conc. HNO3
and H2S.
a.
NO2 b.
N2O3 c. NO d.
N2O
7.
Aqua regia is formed by mixing
a.
One volume of HNO3 & 3 volume of
HCl b. One volume of HNO3 & 2
volume of HCl
c. One
volume of HNO3 & one volume of HCl d. One volume of HNO3 &
one volume of HNO3 8. In
which substance nitrogen is not present.
a.
Urea b. Protein c.
Chile salt peter d.
Galena
9.
Which one of the following oxides is a Neutral
oxide?
a.
N2O b.
N2O3 c. N2O4 d.
N2O5
10.
Elements of group VIA show a covalency of +2,
+4, +6, except
a.
S b.
Se c. Po d.
O
11.
The catalyst used in the contact process is
a.
V2O5 b. P2O5 c. Fe3O4 d.
Pt
12.
The oxidation state of S in H2S2O7
a.
+4 b.
+5 c. +6 d.
+7
13.
In which of the following compounds, oxygen has
a positive oxidation state?
a.
H2O2 b. ClO2 c. OF2
d.
CO2
14.
Which one of the following acids acts both as an
oxidizing and reducing agent?
a.
HNO3
b. H2SO4 c.
HNO2 d.
H3PO4
15.
Which one of the followings is a combustible
gas?
a.
N2O b.
NO c. NO2
d.
None of these
16.
The type of bonding of group VA elements varies
down the group from
a.
Covalent to ionic b. Non
polar covalent to polar covalent
c.
Ionic to covalent d. Polar
covalent to non – polar covalent
17.
Out of all the elements of group VA, the highest
ionization energy is possessed by
a.
N b.
P c.
Sb d. Bi
18.
Laughing gas is chemically
a.
NO b.
N2O c. NO2
d.
N2O4
19.
Which one of the following statements is
incorrect?
a.
H2SO4 acts as a strong
oxidizing agent
b.
H2SO4 acts as a strong
Reducing agent
c.
H2SO4 acts as a
dehydrating agent
d.
H2SO4 acts as a
sulphonating agent
20.
Which statement is incorrect?
a.
Oxygen helps in combustion b.
Oxygen is itself combustible
c.
Oxygen is paramagnetic in
Nature d.
Oxygen doesn't react with
acids
21.
Phosphorus uses the following orbitals for
bonding
a.
3s b.
3p c. 3d d. All
of these
22.
Mark the incorrect statement?
a.
Both oxygen and sulphure exhibit allotropic
forms
b.
Both oxygen and sulphure have polyatomic
molecules
c.
Both oxygen and sulphure are paramagnetic in
Nature
d.
Both oxygen and sulphure are non-metals
23.
Dinitrogen pentoxide has oxidation number of
nitrogen
a.
+2 b.
+3 c. +4 d. +5
24.
What is produced in this reaction Ba(NO2)2 + H2SO4
BaSO4
+ ?
a.
NO b.
NO2 c. HNO2 d.
HNO3
25.
Sulphur trioxide is an anhydride of
a.
Sulphurous acid b. Sulphuric acid c. Hyposulphuric
acid d. Hydro sulphuric acid
26.
Atomic number of phosphorus is
a.
7 b.
15 c. 33 d.
51
27.
What is the colour of nitrogen gas
a.
Black b. Pink
c.
Brown d.
Colourless
28.
On what temperature N2O is
produced from NH4NO3?
a.
200oC
b. 300oC c.
400oC d.
500C
29.
Which one of the following possesses M.P below OoC?
a.
N b.
P c.
C d.
Bi
30.
Which one of the followings is an anhydride of
nitrous acid?
a.
NO b.
NO2 c. N2O3 d.
N2O5
31.
The most electronegative element among the
following is _____________
a.
Sb b.
N c.
As d. P
32.
Formation of H2SO4 by contact process is an example of
a.
Homogeneous equilibrium b. Heterogeneous
equilibrium
c.
Sulphonation d.
Dilution
33.
Which one of the following species has maximum
number of unpaired electrons
a.
O2-2 b.
O2-1 c.
O2+ d.
O2
34.
What is produced in this reaction
P4
+ 10N2O ? +
10N2
a.
P2O5 b. P4O10
c.
Both a & b d. None
of them
35.
Which test is used to confirm nitrate?
a.
Lake test
b. Ring test c. Both a & b d. None of
them
36.
What is produced is this reaction 4NO2 +
2H2O + O2 ?
a.
HNO3 b.
HNO2 c.
H2O + NO2 d.
H2O
37.
_______________ decolourizes acidified KMnO4
and Br2 water
a.
HNO2 b.
HNO3 c.
Both a & b d. None
of them
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38.
What is produced in this reaction? 3CH3OH + PCl3 ? + H3PO3
a.
CH3Cl
b. CH2Cl2 c. CCl4 d.
None of them
39.
When sugars are treated with conc.H2SO4 the
sugar solns turned black due to
a.
Hydration b.
Dehydration c. Oxidation d.
Decolourization
40.
What is produced in this reaction 3Cu + 8HNO3 (dil) 3 Cu (NO3)2
+ ? + 4H2O
a.
N2O3 b. NO2 c. NO d.
N2O5
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