The empirical formula of hydrocarbon containing 0. 12 mole of carbon and 0.36 mole of hydrogen is
CH2
CH3
C2H2
C2H4
C2H6
Correct answer is B
No explanation has been provided for this answer.
6.02 x 10 23
3.01 x 1022
6.02 x 1022
5. 08 x 1022
3.01 x 1022
Correct answer is C
27g Aluminium = \(6.02 \times 10^{23}\)
1g Al = \(\frac{6.02 \times 10^{23}}{27}\)
2.7g Al = \(\frac{6.02 \times 10^{23}}{27} \times 2.7\)
= \(6.02 \times 10^{22} Al \) atoms
Which of the following does not affect the rate of a chemical reaction?
Addition or presence of a catalyst
Size of the reacting particles
The enthalpy change for the reaction
Concentration of the reactants
Temperatureat which the reaction is carried out
Correct answer is C
No explanation has been provided for this answer.
Which of the following compound is aromatic?
Benzene
Cyclobutane
Cyclopentane
Hexane
Ethene
Correct answer is A
No explanation has been provided for this answer.
The reaction represented by the equation NaOH(aq) + HCI(aq) → NaCI(aq) + H2O(/)
is a double decomposition
is a neutralization
is reversible
is usually catalysed
attains equilibrium after a few seconds
Correct answer is B
No explanation has been provided for this answer.