If the following are kept in closed vessels at over `400^@C`, what would happen to them
iron filings and steam ?

If the following are kept in closed vessels at over 400^@C , what would happen to them hydrogen and magnetic oxide of iron ?

If the pressure in a reaction vessel for the following reaction is increased by decreasing the volume ,what will happen to the concentrations of CO and CO_(2) ? H_(2)O(g)+CO(g)hArrH_(2)(g)+CO_(2)(g) +Heat

Which of the following are chemical changes ? (a) Growth of a plant (b) Rusting of iron (c ) Mixing of iron filings and sand (d) Cooking of food (e ) Digestion of food (f) Freezing of water (g) Burning of a candle

If the number of molecules of a gas in a closed vessel is doubled what happens to (i) the pressure of the gas, (ii) the total kinetic energy and (iii) the r.m.s. velocity of the gas?

Enzymes work at optimum temperature. Over a range 0-40^(@)C , what would happen to the rate of enzyme controlled reactions for every 10^(@)C rise in temperature ?

A sample of gas is taken in a closed vessel at 20^(@)C . The gas is heated until the pressure and volume is doubled. What is the final temperature?

If the distance between two equal point charges is doubled and their individual charges are also doubled, what would happen to the force between them?

A certain amount of a gas at 27^(@)C and 1 atmospheric pressure occupies a volume of 25dm^(3) . If the pressure is kept constant and the temperature is raised to 77^(@)C , what would be the volume of the gas ?

A stone tied to the end of a string is whirled in a horizontal circle. The mass of the stone is 1.0 kg and the string is 0.50 m long. If the stone revolves at a constant speed for 10 times in 15.71 s, (a) what is the tension in the string? (b) What would happen to the tension in the string if the mass was doubled and all the other quantities remained the same? (c) What would happen to the tension in the string if the period was doubled and all the other quantities remain the same?

What would happen if a plasmolysed cell is kept in pure water?