A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende
Write down the three letters each from the list above, which are relevant to :
Aluminium

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Write down the three letters each from the list above, which are relevant to : 1. Zinc 2. Aluminium

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Write the formula of cryolite.

A to F below relate to the source & extraction of either Zinc or Aluminium. A: Bauxite, B: Coke, C : Cryyolite, D : Froth flotation, E : Sodium hydroxide solution, F: Zinc blende. (i) Write down the three letters each from the above list which are relevant to - Aluminium (ii) Fill in the blanks using the most appropriate words from A to F : (a) The ore from which aluminium is extracted must first be treated with ______________so that pure Aluminium oxide can be obined. (b) Pure Aluminium oxide is dissolved in _____________ to make a conducting solution (iii) Write the formula of Cryolite.

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Pure aluminium oxide is dissolved in to make a conducting solution.

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende The ore from which aluminium is extracted must first be treated with ............ so that pure aluminium oxide is obtained.

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: Write down the word which correctly completes the following sentence: "By dissolving aluminium oxide in cryolite a __________ solution is produced. (nonconducting/conducting)"

Write the balanced chemical equations for the following : (a) Pb_(3)O_(4) is treated with nitric acid. (b) Zinc oxide is treated with excess of sodium hydroxide solution. (c) Dilute nitric acid is slowly reacted with metallic tin. (d) Gold is dissolved in aqua regia. (e) Iron reacts with cold dilute nitric acid. (f) Sodium thiosulphate is added slowly to silver nitrate. (g) Heating of ZnCI_(2).2H_(2)O .

The questions below refer to the following salt solutions listed A to F:- A: Copper nitrate B: Iron [II] sulphate C: Iron [III] chloride D: Lead nitrate E: Magnesium sulphate F: Zinc chloride. i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution. [i.e. white ppt. insoluble in dil. HCI] ii) Which two solutions will give a white ppt. when treated with dil. HNO_3 & AgNO_3 soln. iii) Which soln. will give a white ppt. when either dil. HCl or dil. H_2SO_4 , is added to it. iv) Which soln. becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it. v) Which solution gives a white precipitate with excess ammonium hydroxide solution.

From the list of characteristics given below, select the five which are relevant to non-metals and their compounds : A Ductile B Conduct electricity C Brittle D Acidic oxides E Basic oxides F Discharged at anode G Discharged at cathode H lonic chlorides 1 Covalent chlorides J Reaction with dilute sulphuric acid yields hydrogen K 1, 2 or 3 valence electrons L 5, 6 or 7 valence electrons (Write the five letters corresponding to the correct characteristics)

A parallel plate vacuum capacitor with plate area A and separation x has charges +Q and -Q on its plates. The capacitor is disconnected from the source of charge, so the charge on each plate remains fixed. (a) What is the total energy stored in the capacitor? (b) The plates are pulled apart an additional distance dx. What is the change in the stored energy? (c) If F is the force with which the plates attract each other, then the change in the stored energy must equal the work dW = Fdx done in pulling the plates apart. Find an expression for F . (d) Explain why F is not equal to QE , where E is the electric field between the plates.