In which of the following crystals are the particles held by van der Waal's forces only?

Compounds that have the same molecular formula but different structures are said to be

Which of the following properties is not characteristic of electrovalent compounds?

How many principal electronic shells has an atom whose electronic configuration is shown below? 1s22s22p63s1

Which of the following is not a direct petroleum product?

In solution, aminoethanoic acid (glycine) can be represented as NH+3 CH2COO. This implies that it

river contaminated by alkali waste will have a pH of about.

An organic compound which reacts readily with bromine to form a compound with the formula CH3CHBrCH2Br is

When a crystal was added to its solution, it did not dissolve and the solution remained unchanged, showing that the solution was

A current of 4.0 amperes was passed through copper (ll) tetraoxosulphate (IV) solution for one hour using copper electrodes. What was the mass of copper deposited? (Cu = 64, 1F = 96500 C)

Which of the following is suitable for determining different isotopes present in an element which exhibits isotopy?

Hydrogen is used for the following except

1991 WAEC SSCE Chemistry Past Questions