The substance which is not an alloy of copper is ……………

1. brass
2. bronze
3. solder
4. duralumin

Which of the following electrolyte is used in the process of nickle plating?

1. Silver nitrate
2. Potassium argentocyanide
3. Nickle ammonium sulphate
4. Carbon rods

The salt that is formed by the incomplete neutralisation of an acid molecule by a basic radical is ……………

1. acidic salt
2. basic salt
3. neutral salt
4. none of the above

The experiment which demonstrates that hydrogen chloride is highly soluble in water is ……………

1. Contact process
2. Fountain experiment
3. Haber's process
4. Ostwald's process