1. The filament of an electric bulb is made of
a) Iron
b) Nichrome
c) Tungsten 👈 Correct Answer
d) Graphite
2. Bleaching Powder is made from
a) Sulpher dioxide and Gypsum
b) Chlorine and Charcoal
c) Soda ash and Lime
d) Lime and Chlorine 👈 Correct Answer
3. The two elements that are frequently used for making transistors are
a) Boron and Aluminium
b) Silicon and Germanium 👈 Correct Answer
c) Iridium and Tungsten
d) Niobium and Columbium
4. Which of the following gases is not known as greenhouse gas?
a) Carbon Dioxide
b) Methane
c) Nitrous Oxide 👈 Correct Answer
d) Chlorofluorocarbons
e) Hydrogen
5. Which of the following is not a neutral oxide?
a) Carbon Monoxide
b) Sulphur Dioxide 👈 Correct Answer
c) Nitric Oxide
d) Water
e) Nitrous Oxide
6. Titanium is Purified by
a) Zone Refining
b) Electrolysis
c) Van Arkel method 👈 Correct Answer
d) Hydraulic Washing
7. Which of the following is used in making Smoke Bomb?
a) Sulphur
b) Phosphorus 👈 Correct Answer
c) Hydrogen
d) Carbon
8. Caustic Soda is
a) NaCl
b) Na2CO3
c) NaOH 👈 Correct Answer
d) NaHCO3
9. Which of the following is not a bleaching agent?
a) Sulphur Dioxide
b) Carbon Dioxide 👈 Correct Answer
c) Sodium Hydrochlorite
d) Chlorine
10. The gas Usually filled in the electric Bulb is
a) Hydrogen
b) Oxygen
c) Nitrogen 👈 Correct Answer
d) Carbon Dioxide
11. Ozone attacks
a) Mercury and Silver
b) Copper
c) Silver and Iron
d) Glass
e) None of these 👈 Correct Answer
12. The gases used in different types of welding would include
a) Oxygen and Hydrogen
b) Oxygen, Acetylene and Argon
c) Oxygen and Acetylene 👈 Correct Answer
d) Oxygen, Hydrogen, Acetylene and Nitrogen
13. Which of the following is used for making Magnet?
a) Duralumin
b) Stainless Steel
c) Alnico 👈 Correct Answer
d) Magnalium
14. In which type of rocks are metals like gold and copper mostly found
a) Old Igneous 👈 Correct Answer
b) Old Sedimentary
c) Old Metamorphic
d) New Metamorphic
15. Which of the following is called strategic metal?
a) Silicon
b) Germanium
c) Titanium 👈 Correct Answer
d) Uranium
16. The metal that is present in photo film is
a) Mercury
b) Platinum
c) Magnesium
d) Silver 👈 Correct Answer
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