UNN Chemistry 2017/2018 DAY 2 Past Questions

Which of the following is used to hasten the ripening of fruits?

The products of the combustion of candle wax are

In the electrolytic extraction of aluminium, the function of the molten cryolite is to

A suitable solvent for iodine and naphthalene is

What is the IUPAC name of the hydrocarbon
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Which of the following molecules is not linear in shape?

Which of the following reactions do alkenes undergo?

Which of the following arrangements is in order of decreasing electropositivity?

How much heat will be liberated if 10g of hydrogen burns in excess oxygen according to the following thermochemical equation?
H_2(g) + 1/2O_2(g) --> H₂O_(l) ∆H^o = -286KJ

What type of bond exists between an element X with atomic number 12 and Y with atomic number 17?

Which of the following is an example of a mixture

Which of the following is correct of the change in oxidation number of phosphorus from 4P to 2P₂O₅?

Two 50cm³ cylinders I and II contain hydrogen and oxygen respectively at the same temperature and pressure. If there are 3.0 moles of oxygen, then the mass of hydrogen is

A good method of cleaning up freshly-spilled oil which has not spread over a large surface of water is by

Hardness of water is usually due to the presence of