A. Iron
B. Nichrome
C. Tungsten 👈 Correct Answer
D. Graphite
2. 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
3. Which of the following gas is lighter then air ?
A. Carbon Dioxide
B. Oxygen
C. Ammonia 👈 Correct Answer
D. Chlorine
4. Monazite is an ore of ?
A. Iron
B. Titanium
C. Thorium 👈 Correct Answer
D. Zirconium
5. The element Nickel is a?
A. magnetic metal 👈 Correct Answer
B. Radioactive metal
C. Non magnetic metal
D. complex element
6. Graphite and Sillimanite are?
A. Refractory minerals 👈 Correct Answer
B. Ferrous Minerals
C. Base Minerals
D. None of these.
7. The presence of which of the following salts in water causes corrosion in steam boilers ?
A. Sodium Chloride
B. Magnesium Chloride 👈 Correct Answer
C. Calcium Bicarbonate
D. Potassium Bicarbonate.
8. When an iron nail gets rusted, iron oxide is formed ?
A. without any change in the weight of the nail.
B. with increase in the weight of the nail. 👈 Correct Answer
C. with decrease in the weight of the nail.
D. without any change in color and weight of the nail.
9. Water is good solvent of ironic salts because ?
A. It has no color
B. It has high boiling point
C. It has high dipole moment. 👈 Correct Answer
D. It has high specific heat.
10. The ratio of pure gold in 18 carat gold is ?
A. 60%
B. 75% 👈 Correct Answer
C. 80%
D. 100%
11. The element found on the surface of the moon is?
A. Tin
B. Tungsten
C. Tantalum
D. Titanium 👈 Correct Answer
12. The average of Salinity of sea water is?
A. 2%
B. 2.5%
C. 3%
D. 3.5% 👈 Correct Answer
13. The main constituents of pearls are?
A. Calcium Carbonate & Magnesium Carbonate 👈 Correct Answer
B. Calcium Oxide and Ammonium Chloride
C. Aragonite & Conchiolin
D. Ammonium Sulphate and Sodium Carbonate
14. Super Conductor is characterised by?
A. Zero Permeability 👈 Correct Answer
B. Low Permeability
C. High Permeability
D. Infinite Permeability
15. Of the various forms of carbon, the one which is used for adoption purpose?
A. Diamond
B. Graphite
C. Coke
D. Wood Charcoal 👈 Correct Answer
16. Which of the following is the best conductor of electricity?
A. Zinc
B. Copper
C. Gold
D. Silver 👈 Correct Answer
17. Which of the following element is obtain from the sea weeds?
A. Argon
B. Sulphur
C. Vanadium
D. Iodine 👈 Correct Answer
18. Which gas is used for preparation of soda water?
A. Ammonia
B. Carbondioxide 👈 Correct Answer
C. Hydrogen
D. Nitric Oxide
19. Which of the following ores does not contain iron?
A. Haematite
B. Magnetite
C. Limonite
D. Cassiterite 👈 Correct Answer
20. The element required for solar energy conversion is?
A. Germanium
B. Silicon 👈 Correct Answer
C. Uranium
D. Selenium
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