UI Chemistry 2011/2012 Past Questions

Which of the following gases dissolves in water vapour to produce acid rain during rainfall?

Which of the following is not an allotrope of carbon?

Which oxide is amphiprotic (amphoteric)?

Why will it always be more difficult to extract potassium ions from sea water than to extract magnesium ions? This is because

............ can be used to test for reducing sugars:

2CH₃COOH + Zn —> ? The product of this reaction is:

A ketone reacts with hydroxylamine to give

Alkanoic acids are weak acids and ionises in solution to give:

An excess of ethanol heated with concentrated H₂SO₄ at a temperature of 180°C is dehydrated to give mostly:

Butene can be distinguished from benzene by reaction with:

Detergent is more efficient than soap in cleansing clothes and dishes because of the following reasons except that:

In the manufacture of soap industrially, brine is used to ........... the acid salt.

Methane gas can be made from carbon (II) oxide gas according to the equation 2CO(g) + 2H₂(g) ⟶ CH₄(g) + CO₂(g). Calculate the mass of CO required to produce 8.75 x 10²⁵ molecules of CH₄? [At masses: C=12.011, H= 1.008, O = 15.999, Avogadro's no: 6.022 x 10²³molecules /mole.]

Potassium ethanoate is formed when:

Saponification is defined as:

Soaps and detergents have the same basic characteristics except that the carboxyl group of the fatty acid in detergent is replaced by:

The relatively high boiling point of alkanols is due to:

Two important sources of detergent are:

What is the process associated with conversion of vegetable oil to soap?

When ethanal vapour is passed over manganese (II) ethanoate (manganese acetate) catalyst in the presence of air, the product is:

When KOH is used instead of NaOH in the production of soap, it has the following advantages except it gives:

When palm wine is left exposed to air for a few days, it goes sour. The bacteria in the air oxidises. ........... in palm wine to ............

Which of the following is not true about benzoic acid?

Which of the following reactions is correct?

Which of these is not a property of ethanedioic acid?