CHEMISTRY [SCIENCE] - IMPORTANT - GENERAL KNOELEDGE>>PDF

 

✅Gases used in welding are ? – Acetylene & Oxygen

✅ Gases used by sea divers for breathing are ? – Oxygen & Helium

✅ Best sources for Vitamin D are? – Sunlight & Fish liver

✅Zinc Phosphide is used as? – Rat Poison

✅ Fuse wire is made up of – Lead and Tin

✅Purest form of Iron is? – Wrought Iron

✅ Radium is extracted from . – Pitchblende

✅ Which agent is as ‘ seed’ in artificial rain? – Silver Iodide

✅ Oxides of metals are . – Alkaline

✅ During the process of ‘ rusting’ , the weight of iron .–Increases

✅ ( metal) is liquid at room temperature. – Gallium

✅ What is the formula of common salt – NaCl

✅ What is the maximum number of electrons that a p-orbital can   hold – 6

✅ What is used in fire extinguisher – Sodium bicarbonate

✅ What is the nature of metal oxides – Basic

✅ Which gas burns with popping sound – Hydrogen

✅ Which metal is used for galvanization – Zinc

✅ What is the nature of bleaching powder – Oxidising agent

✅ Which is stored in Kerosene – Sodium

✅ Phenolphthalein gives which color in acidic medium – Colorless

✅ Which gas is used in cigarette lighters? – Butane

✅ Biogas chiefly contains . – Methane

✅ Chemical used as a fixer in Photography is . – Sodium  thiosulphate

✅Aspirin is . – Acetyl Salicylic Acid

✅ is also known as ‘ Stranger Gas.’ – Xenon

✅ Natural rubber is a polymer derived from . – Isoprene

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