**General Knowledge - 2 - General Science** 1. In which of the following compounds the oxidation number of oxygen is +2? (1) F2O (2) O3 (3) KO3 (4) N2O 2. Which is the strongest acid? (1) H2SO4 (2) HCI (3) HNO3 (4) H2CO3 3. Which of the following is a non-metal? (1) Gallium (2) Indium (3) Boron (4) Aluminium 4. Which of the following is a polymer? (1) Vinyl chloride (2) Urea (3) Starch (4) Styrene 5. Which of the following statements about the physical properties of non-metals is not correct? (1) They are not ductile (2) Most of these have high melting and boiling points (3) They do not conduct electricity (4) They are not malleable 6. The differences in the physical properties of metals and. non-metals are due to (1) Different structures of their atoms (2) Different number of their atoms (3) The fact that metals have atoms whereas non-metals have none (4) None of these 7. In the laboratory preparation of chlorine, manganese dioxide (1) Functions as a catalyst (2) Gets oxidized (3) Gets reduced (4) None of these 8. The process of bleaching by chlorine is called (1) Decomposition (2) Oxidation (3) Reduction(4) Substitution 9.Which of the following non-metals is a liquid? (1) Bromine (2) Carbon (3) Phosphorus d Sulphur 10. Which of the following statements about the physical properties of metals is not correct? (1) All metals are solid except mercury. (2) Most of the metals are hard except sodium and potassium (3) They are not malleable (4) Hydrogen and chlorine All the Best !! Lokesh Mathur
Posted on: Tue, 18 Jun 2013 04:43:11 +0000
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