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.
4.00
2.50
0.40
0.25
Correct answer is B
Solubility = \(\frac{\text{number of moles of solution}}{\text{vol of solution}}\)
100g of water = 100 cm\(^3\) = 0.1 dm\(^3\).
CuSO\(_4\) = 160 g/mol
No of moles of CuSO\(_4\) in 40g = \(\frac{40}{160}\)
= 0.25 mol.
Solubility = \(\frac{0.25}{0.1}\)
= 2.5 moldm\(^{-3}\).
Substance employed as drying agents are usually?
amphoteric
hygroscopic
efflorescent
acidic
Correct answer is B
No explanation has been provided for this answer.
Permanent hardness of water can be removed by?
filtration
adding slaked lime
adding caustic soda
boiling
Correct answer is C
- this hardness cannot be removed by boiling. We can remove this hardness by treating the water with washing soda, caustic soda and permutit
A noble gas with a high power of fog penetration used in aerodrome beacons is?
krpton
argon
helium
neon
Correct answer is D
No explanation has been provided for this answer.
12D + 13T → 24He + 01n + energy
The reaction above illustrates?
alpha decay
artificial transmutation
nuclear fussion
nuclear fission
Correct answer is C
No explanation has been provided for this answer.