Many compounds are formed by carbon atom because of its :
more reactivity
covalent and ionic nature
variable valency
catenation nature
When magnesium is heated , the another compound formed with MgO is :
Mg3N2
Mg(NO3)2
MgCO3
Mg(NO3)3
The C-H bond energy in ethane , ethene and ethyne :
more in ethene
more in ethane
more in ethyne
same in all these
Which of the following is not a redox reaction ?
KCN + Fe(CN)2 K4[Fe(CN)6]
Rb + H2O RbOH + H2
H2O2 H2O + O
CuI2 CuI + I2
The prefix word 'alkali' for alkaline metals shows :
lustre of silver
ashes of plant
metallic nature
active metal
In first transition series, which element show maximum oxidation states :
Co
Mn
Cr
Fe
B.
Mn
Mn having oxidation numberfrom +2 to + 7