In which of the following pairs are both substances deliquescent?

Which of the following compounds of tin is a strong reducing agent?

When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is

Zinc displaces copper from an aqueous solution of copper (ll) salt because

When ammonium chloride is dissolved in water in a test tube, the tube feels colder showing that

The product of the reaction between ethanol and excess acidified K2Cr2O2 is

Which of the following is correct about the electrons in the 1s orbital? They

Which of the following gases are diatomic except

The alloy used for metal work and plumbing contains

1993 WAEC SSCE Chemistry Past Questions