Dimethyl glyoxime gives a red precipitate with Ni2+, which is used for its detection. To get this precipitate readily the best pH range is
< 1
2-3
3- 4
9- 11
The statement true for is
it has a non-linear structure
it is called pseudohalogen
the formal oxidation state of nitrogen in this anion is -1
it is isoelectronic with NO2
The compound insoluble in water is
mercurous nitrate
mercuric nitrate
mercurous chloride
mercurous perchlorate.
How much energy is released when 6 moles of octane is burnt in air? Given for CO2(g) , H2O(g) and C8H18(l) respectively are - 490, -240 and +160 kJ/mol.
-6.2 kJ
-37.4 kJ
-35.5 kJ
-20.0 kJ
For the equilibrium at 1 atm and 298K.
standard free energy change is equal to zero (= 0)
free energy change is less than zero ( < 0)
standard free energy change is less than zero (< 0)
standard free energy change is greater than zero (G° > 0).
A.
standard free energy change is equal to zero (= 0)
This is a spontaneous process at standard conditions thus, the standard free energy change must be less then zero, i.e. G° < 0.