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.
What is the value of n in the following equation? Cr2O72- + 14H+ + ne- → 2Cr 3+ + 7H2O
2
3
6
7
Correct answer is C
No explanation has been provided for this answer.
backward reaction would be favoured
forward reaction would favoured
reaction would stop
reaction would be at equilibrium
Correct answer is B
No explanation has been provided for this answer.
1.0 mol dm-3
2.0 mol dm-3
4.0 moldm-3
5.0 moldm-3
Correct answer is B
50.5g 0f salt X is contained in 250cm3,
what mass of X is contained in 1000cm3
= (50.5 x 1000) ÷ 250 = 202g
no of moles of salt x = mass÷ molar mass
= 202÷ 101 = 2.0mol/dm3
Which of the following metallic oxides is amphoteric?
AI2O3
Fe2O3
MgO
Na2O
Correct answer is A
No explanation has been provided for this answer.
When NH 4CI was dissolved in water, the container was cold to touch. This implies that
the process is endothermic
the process is exothermic
NH4CI is highly soluble in water
NH 4CI forms a saturated solution
Correct answer is A
No explanation has been provided for this answer.