Science Practice Quiz 6

Q1.What change is observed in ferrous sulphate crystals (FeSO4. 7H2O) when they are heated?

A. They turn blue and gain water B. They turn green and emit oxygen C. They lose water and the colour of the crystals changes D. They melt and solidify into a black mass

Q2.What characteristic odour is observed when ferrous sulphate crystals are heated?

A. Odour of rotten eggs B. Odour of burning sulphur C. Odour of ammonia D. Odour of chlorine

Q3.Which of the following are the products formed when ferrous sulphate decomposes upon heating?

A. Ferric oxide, sulphur dioxide, and sulphur trioxide B. Ferrous oxide, sulphur dioxide, and oxygen C. Iron, sulphur, and oxygen D. Ferric sulphate and water

Q4.What type of reaction is characterized by a single reactant breaking down to give simpler products?

A. Combination reaction B. Displacement reaction C. Double displacement reaction D. Decomposition reaction

Q5.What is calcium oxide commonly known as?

A. Limestone B. Marble C. Quick lime D. Gypsum

Q6.Which of the following industries uses calcium oxide (lime or quick lime)?

A. Textile industry B. Cement manufacturing C. Pharmaceutical industry D. Food processing industry

Q7.What is a decomposition reaction called when it is carried out by heating?

A. Photodecomposition B. Electrolytic decomposition C. Thermal decomposition D. Catalytic decomposition

Q8.In the decomposition of ferrous sulphate, which of the following products are gases?

A. Ferric oxide and sulphur dioxide B. Sulphur dioxide and sulphur trioxide C. Ferric oxide and sulphur trioxide D. Only sulphur dioxide

Q9.What is the chemical name for Limestone?

A. Calcium hydroxide B. Calcium carbonate C. Calcium sulphate D. Calcium chloride

Q10.What is the initial colour of silver chloride before exposure to sunlight?

A. White B. Grey C. Black D. Yellow

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Science Practice Quiz 6