Question

 changes to  on reaction with . There is:

Solution

Correct option is

Decrease in % of carbon

 

                         

Molar mass = 31            molar mass = 32

                   = 38.71%                C% = 37.5%

SIMILAR QUESTIONS

Q1

Two oxides of a metal contain 50% and 40% metal (M) respectively. If the formula of first oxide is  the formula of second oxide will be

Q2

The reaction of calcium with water is represented by the equation,

              

What volume of  at STP would be liberated when 8 g of calcium completely reacts with water?

Q3

No reacts with  to form  When 10 g of  is formed during the reaction, the mass of  consumed is

Q4

100 tons of  containing 20% impurities will give iron by reduction with  equal to

Q5

Hydrocarbon X contains 3 g carbon per gram of hydrogen. Simplest formula of the hydrocarbon X is:

Q6

Equal weights of Zn metal and iodine are mixed together and  is completely converted to  What fraction by weight of original Zn remains unreacted? (Zn = 65, I = 127)

Q7

Which of the following has maximum mass?

Q8

The mass of one atom of hydrogen is approximately

Q9

5.6 L of a gas at NTP are found to have a mass of 11 g. The molecular mass of the gas is

Q10

10 mL of a hydrocarbon on complete combustion gave 30 mL of  and 20 mL of  Molecular formula of the hydrocarbon is: