General Knowledge Questions And Answers :: General Science: part1

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General Knowledge : General Science QUESTIONS AND ANSWERS :: part1 : 56 to 60

Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2024 examinations :

56.Permanent hardness of water may be removed by the addition of

alum
sodium carbonate
lime
potassium permanganate

57.Ozone attacks

mercury and silver
copper
silver and iron
None of these

58.The hardest substance available on earth is

Platinum
Coal
Diamond
Gold

59.Which of the following is not an ore of aluminium ?

Feldspar
Bauxite
Cryolite
Azurite

60.The most malleable metal is

Silver
Gold
Aluminium
Sodium

More General Science QUESTIONS AND ANSWERS available in next pages

    Health is the greatest gift, contentment is the greatest wealth -Buddha
The only place where success comes before work is in the dictionary.- Vidal Sassoon