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Which gas has a characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas?
N2
N2O
Cl2
NH3
A piece of filter paper moistened with lead (ll) ethanoate solution turns black when the paper is dropped into a gas likely to be
sulphur(VI) oxide
hydrogen chloride
sulphur (VI) oxide
hydrogen sulphide
2CO(g) + O2(g) ⇌ 2CO2(g). High pressure will favour the forward reaction because the process
high pressure favours gas formation
the reaction is in dynamic equilibrium
the reaction is exothermic
the process occurs with a decrease in volume
2HCl(aq) + CaCO3(s) → CaCl2(s) + CO2(g) + H2O(l). From the curves L, M, N, P, which represents the production of CO2 gas as dilute HCl is added?
L
M
N
P
The highest rate of production of carbon(IV) oxide can be achieved using
0.05 mol−3 HCl and 5g powdered CaCO3
0.05 mol−3 HCl and 5g lump CaCO3
0.10 mol−3 HCl and 5g powdered CaCO3
0.025 mol−3 HCl and 5g powdered CaCO3
