Q.1.
Which is most explosive? [ Roorkeet 1989]
-
39%
a) NCl3
-
21%
b) PCl3
-
6%
c) AsCl3
-
33%
d) All
Q.2.
The boiling points of the following hydrides follow the order. [EAMCET 1999]
-
33%
a) SbH3 > NH3 > AsH3 > PH3
-
44%
b) NH3 > PH3 > AsH3 > SbH3
-
7%
c) NH3 > AsH3 >PH3 > SbH3
-
15%
d) SbH3 > AsH3 > NH3 > PH3
Q.3.
Which statement is wrong regarding nitrogen? [AFMC 1998]
-
26%
a) Supporter of life
-
22%
b) Hydrogen bonding
-
19%
c) Lighter than air
-
33%
d) Low boiling point
Q.4.
4HNO3 +P4O10 → 4HPO3 +X In the above reaction. the product X is [1999]
-
35%
a) NO2
-
19%
b) N202
-
4%
c) N2O4
-
42%
d) N2O5
Q.5.
Ammonia and sodium hypochlorite reacts to produce [2000]
-
14%
a) NH2OH
-
24%
b) NH2NH2
-
43%
c) N2
-
19%
d) NO
Q.6.
P2O5 is an anhydride of.. [AFMC 2000]
-
23%
a) HPO3
-
45%
b) H3PO4
-
14%
c) H3PO3
-
18%
d) H2P2O7
Q.7.
Nessler's reagent is used for the test of [AFMC 2000]
-
14%
a) CO32-
-
0%
b) CO2
-
73%
c) NH4+
-
14%
d) SO42-
Q.8.
White phosphorus reacts with caustic soda. the products are PH3 and NaH2O2 ... [ IIT 1980]
-
11%
a) Oxidation
-
32%
b) reduction
-
42%
c) Oxidation and reduction
-
16%
d) Neutralisation
Q.9.
PCl5 exists but NCl5does not because .. [ EAMCET 1982]
-
67%
a) Nitrogen has no vacant d-orbitals
-
28%
b) NCl5 is unstable
-
0%
c) Nitrogen atom is much smaller
-
6%
d) Nitrogen is highly inert
Q.10.
or the manufacture of NH3 by the following reaction N2 + 3H2 →2NH3+ 21.9 kCal the favorable conditions are [AFMC 2001 ]
-
38%
a) low temperature, high pressure and catalyst
-
44%
b) high temperature, high pressure and catalyst
-
12%
c) high temperature, low pressure and catalyst
-
6%
d) low temperature, low pressure and catalyst
Q.11.
Which of the following fluoride does not exist? [ MP CEE 1993]
-
59%
a) NF5
-
18%
b) PF5
-
18%
c) AsF5
-
6%
d) SbF5
Q.12.
NH4Cl solution is
-
24%
a) Neutral
-
35%
b) acidic
-
35%
c) basic
-
6%
d) amphoteric
Q.13.
The laughing gas is
-
50%
a) Nitrous oxide
-
11%
b) Dintrogen trioxide
-
11%
c) Nitric oxide
-
28%
d) Nitrogen peroxide
Q.14.
Which of the following is most metallic ... { MP CET 1993]
-
22%
a) P
-
11%
b) As
-
0%
c) Sb
-
67%
d) Bi
Q.15.
Mixture used for the tips of match stick is .. [ DPMT 1984]
-
0%
a) S + K
-
12%
b) Sb2S3
-
62%
c) K2Cr2O7 + S + White P
-
25%
d) K2Cr2O7 + K + S
Q.16.
Which of the following is tetrabasic acid? [ CPMT 1988]
-
50%
a) Orthophosphoric acid
-
19%
b) Hypophosporoic acid
-
6%
c) Metapphosphoric acid
-
25%
d) Pyrophosphoric acid
Explanation
Q.17.
Phosphine is prepared by the action of .. {MP PMT 1988]
-
31%
a) P and H2SO4
-
38%
b) P and NaOH
-
0%
c) P and HS
-
31%
d) P and HNO3
Q.18.
The maximum concentration of nitrogen is present in: [AFMC 2003]
-
13%
a) nitrolim
-
27%
b) calcium ammonium nitrate
-
20%
c) ammonium sulphate
-
40%
d) urea
Q.19.
Which is the most reactive species of phosphorus? [AFMC 2003]
-
62%
a) White
-
12%
b) Red
-
12%
c) Scarlet
-
12%
d) Violet
Q.20.
In aqua-regia the ratio of conc. HNO3 and conc. HCl present is : [2003]
-
19%
a) 1 : 3
-
56%
b) 3 : 1
-
19%
c) 2 : 3
-
6%
d) 3 : 2
Q.21.
Which of the following is pyrophosphoric acid [ AIIMS 1987]
-
12%
a) H3PO4
-
71%
b) H4P2O7
-
6%
c) H4P2O5
-
12%
d) H3PO4
Q.22.
Lapis lazuli is : [2004]
-
13%
a) ferrous sulphate
-
0%
b) copper sulphate
-
53%
c) sodium aiuminosilicate
-
33%
d) zinc sulphate
Q.23.
Which of the following oxides of nitrogen is solid? [AFMC 2004]
-
14%
a) NO2
-
14%
b) N2O
-
29%
c) N2O3
-
43%
d) N2O5
Q.24.
Nitrous oxide is known as : [2004]
-
0%
a) breathing gas
-
79%
b) laughing gas
-
7%
c) exercising gas
-
14%
d) laboratory gas
Q.25.
A colourless gas with the smell of rotten fish is : [2005]
-
43%
a) H2S
-
43%
b) PH3
-
7%
c) SO2
-
7%
d) none of these
Q.26.
Formula for tear gas is : [2005]
-
25%
a) COCl2
-
33%
b) CCl3NO2
-
33%
c) N2 O
-
8%
d) none of these
Q.27.
A gas mixture contains O2 and N2 in the ratio of 1: 4 by weight. The ratio of their number of molecules is: [2006]
-
17%
a) 1:8
-
17%
b) 1:4
-
17%
c) 3:16
-
50%
d) 7:32
Q.28.
Pure silicon doped with phosphorus is a: [2006]
-
0%
a) metallic conductor
-
0%
b) insulator
-
77%
c) n-type semiconductor
-
23%
d) p-type semiconductor
Q.29.
A brown ring appears in the test for [2007]
-
36%
a) nitrate
-
9%
b) nitrite
-
45%
c) bromide
-
9%
d) iron
Q.30.
Which of the following oxides of nitrogen is the anhydride of nitrous acid [AFMC 2007]
-
17%
a) NO
-
17%
b) N2O3
-
17%
c) N2O4
-
50%
d) N2O5