BASIC SCIENCE GENERAL KNOWLEDGE QUESTIONS AND ANSWERS 16 to 20

16.From which mineral is radium obtained

Pitchblende

17.What is laughing gas ?

Nitrous oxide

18. Which form of phosphorus is used in safety metals?

Red Phosphorus

19. Stainless steel is an alloy of

Iron, Chromium and Nickel

20.Antidiuretic hormone (ADH)

causes an increase in the blood pressure

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