P(g) + Q(g) ↔ 3R(s) + S(g) ΔH is negative
Which of the following will increase the yield of R?
Using a larger close vessel
Increasing the temperature
Removing some S
Adding a positive catalyst
Correct answer is C
No explanation has been provided for this answer.
In which of the following reactions does reduction takes place
Fe2+ - e- → Fe3+
2O2- →O2 + 4e-
Cr – 2e- → Cr2+
2H+ + 2e- → H2
Correct answer is D
No explanation has been provided for this answer.
Phosphorus is stored under water to prevent it from
Dehydrating
Becoming inert
Smelling
Catching fire
Correct answer is D
No explanation has been provided for this answer.
The chemical used for coagulation in water purification is
Aluminium tetraoxosulphate (VI)
Copper tetraoxosulphate (VI)
Sodium tetraoxosulphate (VI)
Calcium tetraoxosulphate (VI)
Correct answer is A
No explanation has been provided for this answer.
Environmental pollution is worsened by the release from automobile exhausts of?
Water vapour
Steam
Smoke
Heavy metals
Correct answer is C
Carbon monoxide (CO) popularly known as the Black smoke from exhaust fumes of vehicles (cars, trucks and tricycles) and generators is a toxic gas released into the atmosphere.