4 G carbon Were heated With 8 G Of sulphur. How Much Carbon Disulphide (CS2) Will Be Formed When The Reaction Is Completed? What Will Be Its Percentage Purity?  

Why Kaysons ?

Video lectures

Access over 500+ hours of video lectures 24*7, covering complete syllabus for JEE preparation.

Online Support

Practice over 30000+ questions starting from basic level to JEE advance level.

Live Doubt Clearing Session

Ask your doubts live everyday Join our live doubt clearing session conducted by our experts.

National Mock Tests

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

Organized Learning

Proper planning to complete syllabus is the key to get a decent rank in JEE.

Test Series/Daily assignments

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.



4 g carbon were heated with 8 g of sulphur. How much carbon disulphide (CS2) will be formed when the reaction is completed? What will be its percentage purity?  


Correct option is



C      +     2 S    →     CS2

12g          2 × 32         12 + 2 ×3 2

               = 64 g        = 76 g

Obviously, sulphur will be the limiting reactant.

8 g sulphur will produce 

Carbon reacted 

Total mass of products   



How many moles of lead (II)chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl


0.1 mole of a carbohydrate with empirical formula CH2O contains 1 g of hydrogen. What is its molecular formula? 


The percentage of an element M is 53 in its oxide of molecular formula M2O3. Its atomic mass is about


80 g of oxygen contain as many atoms as in 


A black dot used as a full stop at the end of a sentence has a mass of about one attogram. Assuming that the dot is made up of carbon, calculate the approximate number of carbon atoms presents in the dot?  


Insulin contains 3.4% sulphur. Calculate the minimum molecular mass of insulin.


 atoms of iron weigh as much as 1cc of H2 at S.T.P. What is the atomic mass of iron?


How many years would it take to spend Avogadro’s number of rupees at the rate of 10 lakh rupees per second?


Gastric juice contains about 3.0 g of HCl per litre. If a person produces about 2.5litre of gastric juice per day, how many antacid tablets each  containing 400 mg of Al(OH)­3 are needed to neutralize all the HCl produced in one day. 


What volume at N.T.P of ammonia gas will be required to be passed into 30mL of N H2SO4 solution to bring down the acid normality to 0.2 N?