Ethanol is soluble in water due to the presence of a
Carbonyl group
Hydroxyl group
Phenyl group
Methyl group
Correct answer is B
No explanation has been provided for this answer.
They must be balanced in the cash book and the difference taken to the debtors ledger
They must be balanced in the cash book and the difference taken to the trial balance
They should not be balanced in the cash book before being taking to the trial balance
They should not appear in the trial balance as they were already either received or paid out
Correct answer is D
No explanation has been provided for this answer.
In making bicycle chains
As abrasives
In cutting glass and metals
As dies for drawing wires
Correct answer is A
No explanation has been provided for this answer.
N8,900
N9,800
N14,600
N16,400
Correct answer is D
No explanation has been provided for this answer.
What volume of 0.5M H2SO4 will exactly neutralize 20cm3 of 0.1M NaOH Solution?
2.0cm 3
5.0cm 3
6.8cm 3
8.3cm 3
Correct answer is A
The balanced equation is given as:
\(H_{2}SO_{4} + 2NaOH \to Na_{2}SO_{4} + 2H_{2}O\)
Molarity of \(NaOH = 0.1M\)
Volume of \(NaOH = 20cm^{3}\)
Molarity of \(H_{2}SO_{4} = 0.5M\)
mol NaOH = \(0.1 \times 20cm^{3} = 2molNaOH\)
⇒ \(2mol NaOH \times \frac{1mol H_{2}SO_{4}}{2mol NaOH} = 1 mol H_{2}SO_{4}\)
\(volume of H_{2}SO_{4} = \frac{mole of H_{2}SO_{4}}{molarity of H_{2}SO_{4}}\)
= \(\frac{1 mole}{0.5 M} = 2cm^{3} H_{2}SO_{4}\)