Q. The commercial name for calcium hydride
1) lime
2) hydrolyth
3) slaked lime
4) calgon
Q. The combustible material on the tip of a safety match stick
1) Antimony sulphide
2) Phosphorous
3) Manganese dioxide
4) Sulphur
Q. The color of violet glass is due to the presence of
1) manganese
2) chromium
3) cobalt
4) nickel
Q. The chief constituent of gobar gas (Bio Gas) is
1) methane
2) ethane
3) propane
4) chloride
Q. The chemical name of table salt is
1) potassium chloride
2) sodium chloride
3) calcium chloride
4) sodium hyposulphate
Q. The chemical name of quartz is
1) calcium oxide
2) calcium phosphate
3) sodium phosphate
4) sodium silicate
Q. The chemical name of laughing gas is
1) nitrous oxide
2) nitric oxide
3) nitrogen oxide
4) nitrogen peroxide
Q. The atomic weight of uranium is
1) 237
2) 238
3) 226
4) 242
Q. The ammonium ion is
1) Square planar
2) Tetrahedral
3) Square pyramidal
4) Trigonal pyramidal
Q. The alum used for purifying water is
1) potash alum
2) ammonium alum
3) chrome alum
4) ferric alum
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