Chemistry

The shape of the hydrocarbon compound CH4 is?

A. square planar B. planar C. linear D. tetrahedral Correct Answer: Option D - tetrahedral

4 years ago

How many moles of limestone will be required to produce 5.6g of CaO? [Ca = 40, C = 12, O= 16]

A. 0.20 mol B. 0.10 mol C. 1.12 mol D. 0.56 mol Correct Answer: Option B = 0.10 mol Explanation…

4 years ago

Natural water collected from rivers and ponds contain oxygen; carbon (IV) oxide and?

A. nitrogen B. hydrogen C. chlorine D. sulphur E. oxide Correct Answer: Option A - nitrogen

4 years ago

The gas that is the most dangerous pollutant to human is?

A. sulphur (IV) oxide B. carbon (IV) oxide C. nitrogen (II) oxide D. hydrogen sulphide Correct Answer: Option D -…

4 years ago

Kerosine is commonly used to remove the red colour stain of palm oil from cloths because it?

A. helps to spread the oil over a larger surface area B. react with the oil to form an odourless…

4 years ago

The air around smelting industries is likely to contain?

A. H2S, CO and N2 B. CO2, SO3 and H2 C. H2, SO2 and CO2 D. SO2, N2 and CO2…

4 years ago

The solubility curve shows the variation of solute concentration with?

A. volume B. temperature C. vapour density D. pressure Correct Answer: Option B - temperature

4 years ago

25cm³ of a mixture of noble gases was obtained from air after the removal of other constituents. What was the original volume of air?

A. 2,500 cm³ B. 1250 cm³ C. 125 cm³ D. 80 cm³ Correct Answer: Option A - 2,500 cm³ Explanation…

4 years ago

When water boilers are used for long period of time; the solid substances left behind as scale are?

A. magnesium trioxosilicate (IV) and rust B. magnesium trioxosilicate (IV) and calcium tetraoxosulphate (VI) C. clay and magnesium troxosulphate (IV)…

4 years ago

Equal moles of ethyne and hydrogen iodide react to give?

A. CH2 = CH2 B. CH2 - CHI C. CH3 - CI D. CH2 = CHI Correct Answer: Option D…

4 years ago
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