A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases ?

4.28g of NaOH is dissolved in water and the solution is made to 250 cc. what will be the molarity of the solution ?

When ionic compounds are dissolved in water, they conduct electricity. Explain .

Explain the following: Covalent compounds do not conduct electric current in the fused state, whereas ionic solids do.

(i) What is the function of earth wire in electrical instruments? (ii) Explain what is short circuiting an electric supply. (iii) What is the usual current rating of the fuse wire in the line to feed?

The electric conduction of a salt solution in water depends on the :

When water is added to an aqueous solution of an electrolyte, what is the change in specific conductivity of the electrolyte?

(a) What are the two classifications of batteries ? What is the difference between them ? (b) The resistanc of 0.01 M NaCl solution at 25^(@)C is 200Omega. The cell constant of the conductivity cell is unity. Calculate the molar conductivity of the solution.

Write balanced and informative chemical equations for the following reactions. When electric current passes through water, it decomposes into hydrogen and oxygen.

A hot plate of an electric oven connected to a 220 V lines has two resistance coils A and B , each of 24 Omega resistance, which may be used separately, in series or in parallel. What are the currents in the three cases ?

Identify D When a white crystalline compound X is heated with K_2Cr_2O_7 and concentrated H_2SO_4 , a reddish brown gas A is evolved. On passing A into caustic soda solution a yellow coloured solution of B is obtained Neutralising the solution of B with acetic acid and on subsequent addition of lead acetate, a yellow precipitate C is obtained. When X is heated with NaOH solution a colourless gas is evolved and on passing this gas into K_2Hgl_4 solution a reddish brown precipitate D is formed.