Among the following molecules
(i) eO3 (ii) eOF4 (iii) eF6
those having same number of lone pairs on Xe are
(i) and (ii) only
(i) and (iii) only
(ii) and (iii) only
(i), (ii) and (iii)
emits 8 α-particles and 6 β-particles. The neutron/proton ratio in the product nucleus is
60/41
61/40
62/41
61/42
C.
62/41
The neutron/ proton ratio in the product nucleus is 62/41. 92U238 82X206
Number of protons = 82
Number of neutrons = 124
Neutron/proton ratio in the product nucelus =
α-Particles can be detected using
thin aluminium sheet
barium sulphate
zinc sulphide screen
gold foil
(298 K) of methanol is given by the chemical equation
CH4 (g) + O2 (g) →CH3OH(g)
C (graphite) + O2 (g) + 2H2 → CH3OH(l)
C (diamond) + O2(g) + 2H2(g) → CH3OH(l)
CO(g) + 2H2 → CH3OH(l)
An endothermic reaction with high activation energy for the forward reaction is given by the diagram
When 10 mL of 0.1 M acetic acid (pKa = 5.0) is titrated against 10 ml of 0.1 M ammonia solution (pKb = 5.0), the equivalence point occurs at pH
5.0
6.0
7.0
9.0