The amount of BaSO4 precipitated on mixing BaCl2 (0.5 M) with H2SO4 (1 M) will correspond to
0.5 M
1.0 M
1.5 M
2.0 M
One mole of SO3 was placed in a vessel of 1 L capacity at a certain temperature and the following equilibrium was established.
2SO3 (g) 2SO2 (g) + O2 (g)
If 0.6 moles of SO2 were formed at equilibrium, Kc for the reaction will be
0.036
0.45
0.54
0.675
-particles can be detected by using
thin aluminium sheet
barium sulphate
zinc sulphide screen
gold foil
The pair of amphoteric hydroxides is
Be(OH)2, Al(OH)3
Al(OH)3, LiOH
B(OH)3, Be(OH)2
Be(OH)2, Mg(OH)2
For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, U and w correspond to
U < 0, w = 0
U < 0, w < 0
U > 0, w = 0
U > 0, w > 0
Which of the following arrangement is possible?
n | l | m | s |
5 | 2 | 2 | +1/2 |
2 | 2 | 0 | -1/2 |
3 | -2 | 1 | +1/2 |
0 | 0 | 1 | +1/2 |
Assertion : Molecular nitrogen is less reactive than molecular oxygen.
Reason: The bond length of N2 is shorter than that of oxygen.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : NF3 is a weaker ligand than N(CH3)3.
Reason : NF3 ionizes to give F- ions in aqueous solution.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
C.
If assertion is true but reason is false.
Due to high electronegativity and electron withdrawing nature of F-atom, the lone pair of N-atom in NF3 molecule is not easily available for donation. However, in N(CH3)3, -CH3 group is an electron releasing group, thus lone pair of N-atom in N(CH3)3 molecule can be ligated easily. Except for nitrogen fluoride, all other trihalides hydrolyse in water.