Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite
is an allotropic form of carbon
ia a non-crystalline substance
has carbon atoms arranged in large plates of ring of strongly bond carbon atoms with weak interplate bonds
has molecules of variable molecular masses like polymers
Which one of the following has maximum number of atoms of oxygen?
2 gm of carbon monoxide
2gm of carbon dioxide
2 gm of sulphur dioxide
2 gm of water
Presence of halogen in organic compounds can be detected using
Leibig's test
Duma's test
Kjeldahl test
Beilstien's test
The number of unidentate ligands in the complex ion is called
oxidation number
primary valency
coordination number
EAN
2SO2 (g) + O2 (g) is an example for
neutralisation reaction
homogeneous catalysis
heterogeneous catalysis
irreversible reaction
Which one of the following is a second order reaction?
H2 + Br2 → 2HBr
NH4NO3 → N2 + 3H2O
H2 + Cl2 2HCl
CH3COOCH3 + NaOH → CH3COONa + H2O
D.
CH3COOCH3 + NaOH → CH3COONa + H2O
The reaction is said to be of second order if its reaction rate is determined by the variation of two concentration terms of reactants.
CH3COOCH3 + NaOH → CH3COONa + H2O
is an example of second order reaction.
One mole of oxygen at 273 K and one mole of sulphur dioxide at 546 K are taken in two separate containers, then,
kinetic energy of O2 > kinetic energy of SO2
kinetic energy of O2 < kinetic energy of SO2
kinetic energy of both are equal
None of the above
In the periodic table metals usually used as catalysts belong to
f-block
d-block
p-block
s-block