Related InterviewSolutions

• Why are metals good conductors of electricity while non-metals are not ?
• A metal M found in nature as sulphide ore `(M_(2)S)` is one of the good conductors of heat and electricity and is used in making electric wires : (i) Identify the metal M (ii) Write the balanced chemical equations involved in the process of extraction of the metal. (iii) Draw a labelled diagram for the electrolytic refining of the metal.
• Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?A. DiamondB. GraphiteC. PhosphorusD. Iodine.
• Give two examples each of the metals that are good conductors and comparatively poor conductors of heat respectively.
• Calamine ore can be conerted into zinc oxide by the process of:A. dehydrationB. roastingC. calcinationD. sulphonation
• In the formation of the compound AB, atoms of A lost one electron each while stoms of B gained one electron each. What is the nature of bond in AB? Predict the two properties of AB.
• Which one of the following properties is not generally exhibited by ionic compounds?A. solubility in waterB. electrical conductivity in solid state.C. High melting and boiling pointsD. electrical conductivity in molten state
• (i) Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals. (ii) Ionic compounds have generally high melting points. (iii) Hydrogen is not a metal but is has been assigned a place in the reactivity series of metals. (iv) The galvanised iron article is protected against rusting even if the zinc layer is broken.
• Which one of the following properties is not generally exhibited by ionic compounds?A. Solubility in waterB. Electrical conductivity in solid stateC. High melting and boiling pointsD. Electrical conductivity in molten state.
• Zinc blende ore can be converted into zinc oxide by the process of:A. roastingB. hydrogenationC. chlorinationD. calcination