Chlorine is is used in water treatment as
a germicide
a decolorizing agent
an antioxidant
a coagulating agent
an aerating agent
Correct answer is A
No explanation has been provided for this answer.
In which of the following changes is ∆S negative ?
H2O(l) → H2O(s)
C(s) + 1/2O2,/sub>(g) → CO(g)
PCI5(g) → PCl3(g) + Cl2(g)
NaCl(s) + aq →Na+ (aq) + Cl- (aq)
NH3(g) + HCl(g)
Correct answer is A
No explanation has been provided for this answer.
an acidic oxide
a basic oxide
an amphoteric oxide
a neutra oxide
a mixed oxide
Correct answer is A
No explanation has been provided for this answer.
What does X atand for in the following expression? X = Log(10)(H+)
Enthalpy change (∆H)
Equilibrium constant (K)
Solubility product
Degree of acidity (pH)
lonic product of water
Correct answer is D
No explanation has been provided for this answer.
Carbon is often deposited in the exhaust-pipe of cars because of the?
presence of carbon in petrol
presence of carbon in petrol
incomplete combustion of petrol
presence of additives in petrol
contamination of petrol with diesel
Correct answer is C
The incomplete combustion process that occurs in an engine; result to the emission of carbon monoxide (CO) as a waste product from the exhaust system of vehicles.
Environmental carbon monoxide is produced by incomplete combustion process from any carbon containing fuel.