IGCSE Chemistry: Specimen Questions with Answers 223 - 227 of 240

Complete the symbol equation for this reaction:

Explanation

The reactants for Haber process are:

Answer

Explanation

The reactants for Haber process are hydrogen and nitrogen. Under high pressure, in the presence of iron catalyst (molybdenum being the promoter) , they react to form ammonia which is then collected by dissolving in water.

State one use of aluminum other than as an electrical conductor.

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Explanation

Other than as electrical conductor aluminum is used as Aluminium is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs and aeroplane parts.

Water reacts with metallic oxide to give ________.

Answer

Explanation

Water reacts with metallic oxide to give base.

For example, water reacts with potassium oxide to give potassium hydroxide .

Explanation

Copper is a chemical element with symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color.