Q.1.
The electronegativity of the following elements increases in the order .. [ IIT 1987]
-
0%
a) C, N, Si, P
-
60%
b) N, Si, C, P
-
40%
c) Si, P, C, N
-
0%
d) P, Si, N, C
Q.2.
Hydrolysis of NCl3 gives NH3 and X, Which of the following is X?[AFMC 2008]
-
25%
a) HClO4
-
25%
b) HClO3
-
50%
c) HOCl
-
0%
d) HClO2
Q.3.
The brown ring test for nitrates depends on [AFMC 2008]
-
75%
a) the reduction of nitrate to nitric oxide
-
25%
b) oxidation of nitric oxide to nitrogen dioxide
-
0%
c) reduction of ferrous sulphate to iron
-
0%
d) oxidising action of sulphuric acid
Q.4.
Which acid has P - P linkage? [AFMC 2009]
-
25%
a) Hypophosphoric acid
-
75%
b) Pyrophosphoric acid
-
0%
c) Metaphosphoric acid
-
0%
d) Orthophosphoric acid
Explanation
Q.5.
Which of the following element occurs free in nature? [ CPMT 1988]
-
75%
a)N
-
25%
b) P
-
0%
c) As
-
0%
d) Sb
Q.6.
hich of the following element shows oxidation state + 1 to + 5 in its oxide? [2010]
-
25%
a) N
-
25%
b) P
-
25%
c) As
-
25%
d) F
Q.7.
PbO2 on reaction with cone. HNO3 gives [2010]
-
0%
a) PbNO2 + O2
-
75%
b) Pb(N03)2 + H2O+ ½(O2 )
-
25%
c) Pb+N2+H2O
-
0%
d) Pb(OH)2 + NO
Q.8.
Urea is preferred to ammonium sulphate as a nitrogenous fertilizer because: [2010]
-
0%
a) it is more soluble in water
-
75%
b) it is cheaper than ammonium sulphate
-
0%
c) it is quite stable
-
25%
d) it does not cause acidity in the soil
Q.9.
In nitrogen family, the H-M-H bond angle in the hydrides gradually becomes closer to 90째 on going from N to Sb. This shows that gradually [2011]
-
25%
a) The basic strength of the hydrides increases
-
25%
b) Almost pure p-orbitals are used for M-H bonding
-
50%
c) The bond energies of H-M-H bonds increase
-
0%
d) The bond pairs of electrons become nearer to the central atom.
Q.10.
Phosphorus is manufactured by heating in a furnace
-
50%
a) Bone ash, sodium chloride and coke
-
25%
b) Bone ash, silica and coke
-
0%
c) Bone ash, silica and lime
-
25%
d) Bone ash, coke and lime stone
Q.11.
Which of the following does not belong to p-block element ( GUJCET 2008)
-
25%
a) Sr
-
25%
b) Po
-
0%
c) As
-
50%
d) Ga
Q.12.
The most stable hydride is .. [EAMCET 1988]
-
50%
a) NH3
-
25%
b) PH3
-
0%
c) AsH3
-
25%
d) SbH3
Q.13.
Phosphorus pentaoxide is widely used as ( GUJCET 2010)
-
0%
a) reducing agent
-
25%
b) oxidizing agent
-
0%
c) dehydrating agent
-
75%
d) bleaching agent
Q.14.
Given are H3PO3, H3PO4, H4P2O6, and H4P2O Which of the above oxoacids results into three series of salts Explanation is provided, please click on
-
25%
a )H4P2O7
-
50%
b) H3PO4
-
0%
c) H3PO3
-
25%
d) H3PO3
Q.15.
Producer gas is a mixture of [AIIMS 1998, 2000]
-
0%
a) CO + H2
-
25%
b) H2 + CH4
-
50%
c)CO +N2
-
25%
d) CO +H2O
Q.16.
Nitrogen dioxide [ Karnatak CET 1989]
-
0%
a) Dissolves in water forming HNO3
-
25%
b) Does not dissolve in water
-
0%
c) Dissolves in water to form HNO2 and gives off O2
-
75%
d) Dissolves in water to form a mixture of nitrous and nitric acid
Q.17.
The stability of hydrides follows the order [ Punjab CET 1996 ]
-
25%
a) NH3 > PH3 AsH3 > SbH3
-
50%
b) NH3 < PH3 < SbH3 < AsH3
-
25%
c) PH3 > NH3 > AsH3 > SbH3
-
0%
d) AsH3 > NH3 > PH3 > SbH3
Q.18.
When AgNO3 is heated strongly the products formed are [ Roorkee 1990]
-
25%
a) No and NO2
-
50%
b) NO2 and O2
-
25%
c) NO2 and N2O
-
0%
d) NO and O2
Q.19.
In the manufacture of ammonia by Heber's process, which of the following is unfavourable? [ KCET 2004 ]
-
25%
a) Increasing the temperature
-
25%
b) Increasing the pressure
-
50%
c) Reducing the temperature
-
0%
d) Removing ammonia as it is formed
Q.20.
Ammonia compound which on heating does not give NH3 [ Roorkee 1993]
-
25%
a) (NH4)2SO4
-
0%
b) (NH4)2CO3
-
25%
c) NH4NO2
-
50%
d) NH4Cl
Q.21.
Which of the following is metaphosphoric acid? [ J and K CET 2002]
-
50%
a) H3P3O9
-
25%
b) H5P3O10
-
0%
c) H9P2O7
-
25%
d) H3PO4
Q.22.
Among the trihalides of nitrogen which one is most basic? [ Punjab CET 1997]
-
50%
a) NF3
-
0%
b) NCl3
-
25%
c) NI3
-
25%
d) NBr3
Q.23.
N forms NCl3 whereas P can form PCl3 and PCl5 why? [ Orissa JEE 2004]
-
60%
a) P has low lying 3d-orbitals, which can be used for bonding but N does not have 3d-orbitals in its valance shell
-
0%
b) N atoms is larger than P in size
-
20%
c) P is more reactive towards Cl than N
-
20%
d) None of these
Q.24.
The number of hydroxyl group in pyrophosphoric acid is [ KCET 1993]
-
50%
a) 3
-
25%
b) 4
-
0%
c) 5
-
25%
d) 7
Explanation
Q.25.
When a vapour, at atmospheric pressure was gradually heated from 25°C its colour was found to deepen at first and then to fade as the temperature was raised above 160°C. At 600°C , the vapour was almost colourless, but its colour deepens when the pressure was raised at this temperature. the vapour was
-
0%
a) The bromine
-
100%
b) A mixture of nitrogen dioxide and dinitrogen tetraoxide
-
0%
c) Pure nitrogen dioxide
-
0%
d) Pure dinitrogen tetraoxide
Explanation
Q.26.
When NH3 is passed over heated CuO, it is oxidized to [ Roorkee 1992]
-
25%
a) N2
-
25%
b) NO2
-
50%
c) HNO2
-
0%
d) N2O
Q.27.
Which of the following oxide of nitrogen is a coloured gas [ IIT 1987 ]
-
25%
a) N2O
-
0%
b) NO
-
50%
c) N2O4
-
25%
d) NO2
Q.28.
The bond present in N2O5 are [ IIT 1986]
-
0%
a) Only ionic
-
75%
b) Covalent and coordinate
-
0%
c) Only covalent
-
25%
d) Covalent ionic
Q.29.
P4O10 is not used to dry NH3 gas because [ KCET 2001]
-
25%
a) P4O10 reacts with moisture in NH3
-
0%
b) P4O10 is not a drying agent
-
25%
c) P4O10 is acidic and NH3 is basic
-
50%
d) P4O10 is basic and NH3 is acidic
Q.30.
Which of the following is paramagnetic? [ MPCET 1990]
-
25%
a) NO
-
25%
b) N2O4
-
0%
c) P4O6
-
50%
d) N2O5