Q. What is the dominant chemical present in detergent powder?
1) Hydrochloric acid
2) Sodium carbonate
3) Calcium carbonate
4) Sodium alkyl sulphate
Q. Blue litmus paper turns ......... on contact with an acidic solution.
Q. Rutherford's alpha particle scattering experiment an thin gold foil was responsible for the discovery of -
3) atomic nucleus
Q. Consider the following statement :
Atomic number of an element is a more fundamental property than its atomic mass. Who among the following scientists has made the above statement?
1) Dmitri Mendeleev
2) Henry Moseley
3) J.J. Thomson
4) Ernest Rutherford
Q. Employing Chromatography, one cannot separate -
2) colours from a dye
3) pigments from a natural colour
4) drugs from blood
Q. In graphite, each carbon atom is bonded to three other carbon atoms -
1) forming a three-dimensional structure
2) in the same plane giving a hexagonal array
3) in the same plane giving a square array
4) in the same plane giving a pentagonal array
Q. Which one of the following is monatomic?
Q. In tragedies caused by drinking spurious liquor, the active agent causing such tragedies is -
1) Methyl alcohol
2) Ethyl alcohol
3) Amy alcohol
4) Benzyl alcohol
Q. A high molecular weight compound formed by combining large numbers of small molecules of low molecular weight is called -
4) Direct Dyes
Q. Which gas plays main role in the Green House effect?
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