Atoms and Molecules
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349
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by t...
By BidishaKashayap1333, 3 years ago
replies 1
0
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327
In hydrogen peroxide (H2O2), the proportion of hydrogen and oxygen by mass is
By BidishaKashayap1333, 3 years ago
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0
1
267
In water, the proportion of oxygen and hydrogen by mass is
By BidishaKashayap1333, 3 years ago
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1
275
Which of the following elements has the same molecular mass as its atomic mass?
By BidishaKashayap1333, 3 years ago
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0
1
206
The atoms of which of the following pair of elements are most likely to exist in free stat...
By BidishaKashayap1333, 3 years ago
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0
1
324
The scientist who proposed the first letter (or first letter and another letter) of the La...
By BidishaKashayap1333, 3 years ago
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1
213
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest ...
By BidishaKashayap1333, 3 years ago
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0
1
355
The law of constant proportion was given by: (a) Proust (b) Lavoisier (c) Dalton (d) Berze...
By BidishaKashayap1333, 3 years ago
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0
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153
If 1.4g of calcium oxide is formed by the complete decomposition of calcium carbonate, the...
By BidishaKashayap1333, 3 years ago
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