Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
1:3
2:1
3:1
4:1
Correct answer is B
4HCl + O\(_{2}\) -- 2Cl\(_{2}\) + 2H\(_{2}\)O
4:2 = 4/2
2:1
I only
IV only
I and IV only
II and III only
Correct answer is A
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure
When air in a syringe is compressed such that there is no change in temperature, the
air liquefies
pressure increases
intermolecular space increases
density decreases
Correct answer is B
Since the temperature of air remain constant.So, it is a isothermal process.
PV=K
This eq. shows that on increasing pressure, the volume gets reduced and vice-versa.
Since the syringe is slowly compressed, volume is decreasing.
Therefore, the pressure inside the syringe will increases because the molecules now hit the syringe walls more frequently.
shift the equilibrium to the right
increase the yield of ammonia
decrease the amount of hydrogen
decrease the yield of ammonia
Correct answer is D
In this case, an increase in in temperature will cause the equilibrium position to shift to the left thereby decreasing the yield of ammonia.
Which of the following statements about an equilibrium system is correct?
Forward and backward reactions occur at the same rate
The concentrations of reactants must equal that of the products
The concentrations of, reactants and products can be changed by adding a catalyst,
The concentrations of reactants and products are not affected by a change in temperature
Correct answer is A
Equilibrium is a state of a system where there is no observable change in the properties of the system with respect to time