H(s)S is reduced to S
Fe3+ ions are oxidized by H(s)S
Fe3+ ions are oxidized Fe3+ ions
Fe3+ ions are reduced to Fe2+ ions
Correct answer is D
No explanation has been provided for this answer.
Which of the following is used in fire extinguishers?
Carbon (ll) oxide
Carbon (lV) oxide
Sulphur (lV) oxide
Ammonia
Correct answer is B
No explanation has been provided for this answer.
Which property of a reversible reaction is affected by a catalyst?
Heat content (enthalphy)
Energy of activation
Free energy change
Equilibrium position
Correct answer is B
No explanation has been provided for this answer.
Which of the followingstatements is TRUE?
The dissolution of NaOH(s) in water is endothermic
The heat os solution of NaOH(s) is positive
The NaOH(s) gains heat from the surroundings
The heat of solution of NaOH(s) is negative
Correct answer is D
No explanation has been provided for this answer.
A decrease in temperature and an increase in the concentration of the reactants
An increase in the temperature and a decrease in the cocentration of the reactants
An increase in temperature and an increase in the concentration of the reactants
A decrease in the temperature and a decrease in the concentration of the reactants
Correct answer is C
No explanation has been provided for this answer.