Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO ANSWER DOWNLOAD EXAMIANS APP
Chemistry Hydrogen is not found in atmosphere because It immediately combines with oxygen to form water It is the lightest gas It is highly inflammable It is absorbed by plants It immediately combines with oxygen to form water It is the lightest gas It is highly inflammable It is absorbed by plants ANSWER DOWNLOAD EXAMIANS APP
Chemistry Main source of lead pollution is from Tobacco Insecticides Leaded gasoline Sewage Tobacco Insecticides Leaded gasoline Sewage ANSWER DOWNLOAD EXAMIANS APP
Chemistry The number of waves in n x 10th Bohr's orbit are n-2 n2 n n3 n-2 n2 n n3 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Percentage of carbon in steel ranges from 3.0 to 4.0 0.1 to 1.5 4.0 to 6.0 1.5 to 3.0 3.0 to 4.0 0.1 to 1.5 4.0 to 6.0 1.5 to 3.0 ANSWER DOWNLOAD EXAMIANS APP
Chemistry An element of atomic no. 29 belongs to S-block D-block P-block F-block S-block D-block P-block F-block ANSWER DOWNLOAD EXAMIANS APP
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