Which of the elements will burn in excess oxygen to form a product that is neutral to litmus?
Carbon
Hydrogen
Sulphur
Sodium
Correct answer is B
No explanation has been provided for this answer.
Which of the following reactions is sulphur (IV) oxidizing agent?
2HNO 3(aq) + SO2(g) → H2SO4(aq) + 2NO2(g)
2KMnO 4(aq) + 5SO2(g) + 2H2O → K2SO4(aq) +MnSO4(aq) 2H2SO4(aq)
FeCI3(aq) + SO2(g) + 2H2O(l) → FeCI 2(g)+ 2HCI(g) + H2SO4(aq)
2H2S(g) + SO2(g) →2H2O(l) + 3S(s)
Correct answer is B
It also reduces potassium permanganate and dichromate to Mn2+ and Cr3+ respectively.
Which of the following methods is suitable for preparing insoluble salts?
Thermal decomposition
Oxidation
Double decomposition
Neutralization
Correct answer is C
No explanation has been provided for this answer.
When ice is changing to water, its temperature remains the same because the heart gained is
used to separate the molecules
lost partially to the atmosphere
used to increase the volume of ice
less than the activation energy
Correct answer is A
No explanation has been provided for this answer.
Which of the following compounds dissolves readily in water?
BaSO4
CuSO3
NH4CI
AgCI
Correct answer is C
No explanation has been provided for this answer.