The drying agent suitable for drying ammonia is
Calcium Chloride
Calcium Oxide
Phosphorus(V) Oxide
Concentrated H2SO4
Correct answer is B
No explanation has been provided for this answer.
3
2
4
5
Correct answer is C
No explanation has been provided for this answer.
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.
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.
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 = \(0.1 \times 20cm^{3} = 2molNaOH\)
⇒ \(2mol NaOH \times \frac{1mol H_{2}SO_{4}}{2mol NaOH} = 1 mol H_{2}SO_{4}\)
\(volume of H_{2}SO_{4} = \frac{mole of H_{2}SO_{4}}{molarity of H_{2}SO_{4}}\)
= \(\frac{1 mole}{0.5 M} = 2cm^{3} H_{2}SO_{4}\)