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.
2–ethyl butane
butane
2–methyl butane
2–methyl propane
Correct answer is C
C5H12 has 5 carbons acid 12 hydrogens.
2–methyl butane
No of carbon=5
No of hydrogen=12
The oxidation number of iodine in KIO3 is
+7
+3
+5
+6
Correct answer is C
If the rules are followed, it is non-negotiable that +5 is the suitable answer to the question.
400k
480k
550k
600k
Correct answer is D
At constant pressure connotes Charle's law
\(\frac{V_1}{T_1}\) = \(\frac{V_2}{T_2}\)
\(\frac{2dm^3}{300k}\) = 2 x \(\frac{2dm^3}{T_2}\)
T2= 600k
k [P]x [Q]y
\(\frac{[P]^x [Q]^y}{[R]^m [S]^n}\)
\(\frac{[R]^m [S]^n}{[P]^x [Q]^y}\)
\(\frac{m[R] n[S]}{x[P] y[Q] }\)
Correct answer is C
Expression for equilibrium constant
k = \(\frac{\text{concentration of product}}{\text{concentration of reactant}}\)
The constituent of air necessary in the rusting process are
O2 and H2O
Ar and CO2
CO2 and H2O
O2 and CO2
Correct answer is A
Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.