BASIC SCIENCE GENERAL KNOWLEDGE QUESTIONS AND ANSWERS 46 to 50

46. Water gas is prepared by passing

Steam over white hot coke

47.Which of the following is used in pencils?

Graphite

48.LPG consists of mainly

methane, butane and propane

49.Permanent hardness of water can be removed by adding

washing soda

50.Which of the following is not an isotope of hydrogen?

Yttrium

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