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.
The arrangement of particles in crystal lattices can be studied using
X-rays
\(\beta\)-rays
\(\alpha\)-rays
\(\gamma\)-rays
Correct answer is A
No explanation has been provided for this answer.
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.
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 = \(0.1 \times 20cm^{3} = 2molNaOH\)
⇒ \(2mol NaOH \times \frac{1mol H_{2}SO_{4}}{2mol NaOH} = 1 mol H_{2}SO_{4}\)
\(volume of H_{2}SO_{4} = \frac{mole of H_{2}SO_{4}}{molarity of H_{2}SO_{4}}\)
= \(\frac{1 mole}{0.5 M} = 2cm^{3} H_{2}SO_{4}\)
An example of an acidic oxide is
NO
CO
SO2
CuO
Correct answer is C
No explanation has been provided for this answer.
The metal whose ore can be concentrated by passing it through a magnetic separator is
Zn
Sn
Cu
Ca
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is correct about the periodic table?
Elements in the same group have the same number of electron shells
The non-metallic properties of the elements tend to decrease across each period
Elements in the same period have the same number of valence electrons
The valence electrons of the elements increase progressively across the period
Correct answer is D
No explanation has been provided for this answer.
Which of the following is not an alkali?
Ca(OH)2
NH3
NaOH
Al(OH)3
Correct answer is D
Al(OH)3 is not generally an alkali but is amphoteric; acting as a base and an acid when the need arises.
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