Q. Galvanized iron pipes have a coating of -
1) Zinc
2) Mercury
3) Lead
4) Chromium
Q. Detergents used for cleaning clothes are -
1) Carbonates
2) Bicarbonates
3) Bismuthates
4) Sulfonates
Q. Blue vitriol is chemically -
1) sodium sulfate
2) nickel sulfate
3) copper sulfate
4) iron sulfate
Q. The positively charged part at the centre of an atom is called as -
1) proton
2) neutron
3) electron
4) nucleus
Q. The conversions of a solid directly into gas is called as -
1) sublimation
2) condensation
3) evaporation
4) boiling
Q. The heaviest metal among the following is -
1) Gold
2) Silver
3) Mercury
4) Platinum
Q. Stainless steel is an alloy of -
1) iron and nickel
2) iron and chromium
3) copper and chromium
4) iron and zinc
Q. To protect broken bones, plaster of Paris is used. It is -
1) Slaked lime
2) Calcium Carbonate
3) Calcium Oxide
4) Gypsum
Q. A hydrocarbon in which two carbon atoms are joined by a double bond is called as an -
1) Alkane
2) Alkene
3) Alkyne
4) Ionic bond
Q. The chemical name for vinegar is -
1) Methanol
2) Ethanol
3) Acetic Acid
4) Ethyl Acetate
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