Which of the following metals was first discovered by man?
1 Bronze
2 Silver
3 Iron
4 Copper
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Answer / sanjay
in ncert books, copper was first discovered by man.
Is This Answer Correct ? | 1 Yes | 1 No |
Write two characteristics of Science.
0 Answers Mahatma Gandhi University,
Using an applied force of a Newton across one meter is known as a:
Why Colours is Important in Our Daily Life???
Which of the following gases is lighter than air? 1 Carbon dioxide 2 Oxygen 3 Ammonia 4 Chlorine
The hardest substance available on earth is 1 Platinum 2 Coal 3 Diamond 4 Gold
13 Answers FCI, University of Ilorin,
Deep blue color is imparted to glass by the presence of 1 Iron oxide 2 Cupric oxide 3 Nickel oxide 4 Cobalt oxide
Among the various allogropes of carbon 1 Diamond is the hardest, lamp black is the softest 2 Diamond is the hardest, coke is the softest 3 Coke is the hardest, graphite is the softest 4 Diamond is the hardest, graphite is the softest
Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 Lime 4 Potassium permanganate
Atom bomb is based on the principle of 1 Nuclear fusion 2 Nuclear fission 3 Both (a) & (b) 4 None of these
4 Answers ECAT, Group 4 iv, Qnet, UPSC,
The human skull rests on which bone? a)Manubrium b)Atlas c)Mandible d)Sternum
what are the advantages and disadvantages of rational knowledge?
The ratio of pure gold in 18 carat gold is 1 60% 2 75% 3 80% 4 100%
3 Answers DSSSB-Delhi Subordinate Service Selection Board,