Which one of the following is not true at room temperature and pressure?
P4O10 is white solid
SO2 is a colourless gas
SO3 is a colourless gas
NO2 is a brown gas
An element belongs to group 15 and third period of the Periodic Table. Its electronic configuration will be:
1s22s22p3
1s22s22p4
1s22s22p63s23p3
1s22s22p63s23p2
Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCl?
MnO2
H2S
KMnO4
Cr2O3
NO2 is not obtained on heating:
AgNO3
KNO3
Cu(NO3)2
Pb(NO3)2
B.
KNO3
2AgNO3 2Ag + 2NO2 + O2
2KNO3 2KNO2 + O2
2Cu(NO3)2 2CuO + 4NO2 + O2
2Pb(NO3)2 2PbO + 4NO2 + O2
Of the following acids the one which has the capability to form complex compound and also possesses oxidising and reducing properties is
HNO3
HNO2
HCOOH
HCN
Atoms in a P4 molecule of white phosphorus are arranged regularly in the following way
at the corners of a cube
at the corners of an octahedron
at the corners of a tetrahedron
at the centre and corners of a tetrahedron