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.
Which of the following oxides of nitrogen is unstable in air?
NO2
NO
N2O4
N2O5-
Correct answer is B
No explanation has been provided for this answer.
i and ii
ii and iv
i and iii
ii and iv
Correct answer is C
Oxyhydrogen is a mixture of hydrogen and oxygen gases.
This gaseous mixture is used for torches to process refractory materials and was the first gaseous mixture used for welding.
A gas torch that burns a mixture of acetylene and oxygen to produce a high-temperature flame (3,000°C or 5,400°F) that can weld or cut metal.
Which of these statements is TRUE about carbon (IV) oxide?
it supports combustion
It is strongly acidic in water
It is very soluble in water
It supports the buring of magnesium to produce magnesium oxide
Correct answer is C
Carbon(iv)oxide does not burn, nor support the combustion of most substance .
The intense heat produced by burning magnesium,
However, decomposes Carbon(iv)oxide to release oxygen for the further oxidation of magnesium.
Carbon(iv)oxide dissolves in water to form trioxocarbonate(iv) acid ( soda water).
k (p)x (Q)y
(p)x (Q)y / (R)m (S)n
(R)m (S)n / (p)x (Q)y
m(R) n (S) / x(P) y (Q)
Correct answer is C
No explanation has been provided for this answer.
H2(g) + I2(g) ≈ 2HI(g)
2NO2(g) ≈ N2O4(g)O4(g)N2O4(g)
PCI5(g) ≈ PCI3(g) + CI2(g)
ZnO(s) + CO2(g) ≈ ZnCO3(g)
Correct answer is D
No explanation has been provided for this answer.