Question
What will be the ratio of a number of molecules present in 1 L of H2 gas and 4 L of CO2 gas at STP?
What will be the ratio of a number of molecules present in 1 L of H2 gas and 4 L of CO2…
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Question
At a certain pressure the volume of a fixed mass of a gas at a temperature of 0°C is Yo; what will be the increase in volume of the gas, according to Charles’ law, if the temperature of the gas is raised by 1°C keeping the pressure unchanged?
At a certain pressure the volume of a fixed mass of a gas at a temperature of 0°C is Yo; what will…
Question
What is meant by the calorific value of a sample of coal is 30,000 kJkg-1?
What is meant by the calorific value of a sample of coal is 30,000 kJkg-1? OR Why can wind energy be used…
Question
Name a gas present in the atmosphere which is not a greenhouse gas.
Name a gas present in the atmosphere which is not a greenhouse gas.
Question
Which of the following is an alcohol?
Which of the following is an alcohol? CH3OCH3 CH3CHO CH3COOH CH3CH2OH
Question
Which of the following is the formula of zine blende, an ore of zinc?
Which of the following is the formula of zine blende, an ore of zinc? ZnO Zns ZnCO3 InSO4
Question
For the preparation of N2 gas in the laboratory, the mixed aqueous solution of which of the following two compounds is used?
For the preparation of N2 gas in the laboratory, the mixed aqueous solution of which of the following two compounds is used?…
Question
In the extraction of aluminium by the process of electrolysis, the fused mixture used contains which of the following along with cryolite and fluorspar?
In the extraction of aluminium by the process of electrolysis, the fused mixture used contains which of the following along with cryolite…
Question
In the formation of CaO how many electrons are transferred from Ca atom to O atom?
In the formation of CaO how many electrons are transferred from Ca atom to O atom? (Atomic numbers of oxygen and calcium…
Question
How many elements are there in the fourth period of long periodic table?
How many elements are there in the fourth period of long periodic table? 8 32 16 18