Bisulphates are formed at a temperature …………............ `200^@C`.

The smog which is formed at high temperature is

Write the formula for : Sodium bisulphate : ..............

Give reasons for the following : In the laboratory preparation of HCl acid from NaCl and conc . H_(2)SO_(4) , the residual salt formed at temperatures above 200^(@)C forms a hard crust and sticks to the glass.

A sphere, a cube and a thin circular plate, all made of the same mass and finish are heated to a temperature of 200^(@)C . Which of these objects will cool slowest, when left in air at room temperature?

The two ends of a metal rod are maintained at temperature 100^(@)C and 110^(@)C . The rate of heat flow in the rod is found to be 4.0 J//s . If the ends are maintained at temperature s 200^(@)C and 210^(@)C . The rate of heat flow will be

At what temperature will a given mass of a gas occupy a volume of 200L, if it occupies a volume of 260L at a temperature of 30^(@)C, pressure remaining constant?

Three bars of equal lengths and equal area of cross-section are connected in series fig. their thermal conducitives are in the ratio 2:3:4 . If at the steady state the open ends of the first and the last bars are at temperature 200^(@)C and 20^(@)C respectively, find the temperature of both the junctions. .

The resistance of a bulb filamanet is 100Omega at a temperature of 100^@C . If its temperature coefficient of resistance be 0.005 per .^@C , its resistance will become 200 Omega at a temperature of

Two identical spheres A and B are suspended in an air chamber which is maintained at a temperature of 50^@C . Find the ratio of the heat lost per second from the surface of the spheres if a. A and B are at temperatures 60^@C and 55^@C , respectively. b. A and B are at temperatures 250^@C and 200^@C , respectively.

Six identical cunducting rods are joined as shown in Fig. Points A and D are maintained at temperatures 200^@C and 20^@C respectively. The temperature of junction B will be