HARD
JEE Main
IMPORTANT
Earn 100

A compound which contains one atom of X and two atoms of Y for each three atoms of Z, is made by mixing 5.00 g of X, 1.15×1023 atoms of Y and 0.03 mole of Z atoms. Given that only 40 g of compound results, calculate the atomic weight of Y, if the atomic weight of X and Z are 60 and 80 amu, respectively. 

Important Questions on Some Basic Concepts, Mole Concept and Stoichiometry

MEDIUM
JEE Main
IMPORTANT

For the reaction given below, calculate the mass of FeO produced from 2 g VO and 5.75 g of Fe2O3. Also, report the limiting reagent.

VO+Fe2O3FeO+V2O5

MEDIUM
JEE Main
IMPORTANT

Carbon disulphide CS2 can be made from the by-product of SO2. The overall reaction is: 

5C+2SO2CS2+4CO

How much of CS2 can be produced from 440 kg of waste SO2 with 60 kg of coke, if the SO2 conversion is 80%?
 

MEDIUM
JEE Main
IMPORTANT
Find out the weight of zinc that would be required to produce enough hydrogen to reduce completely 8.5 g of copper oxide to copper? (Atomic mass: H-1, O-16, S-32,Cu-63.5, Zn-65.4)
HARD
JEE Main
IMPORTANT
200 mL of any gas at N.T.P was heated with tin. Tin got converted into stannous sulphide and hydrogen was left. This hydrogen when passed over hot CuO, produced 0.162 g of H2O. Suppose the vapour density of the gas is 17, find its formula.
MEDIUM
JEE Main
IMPORTANT

Calculate the amount of Ni needed in the Mond's process given below.

Ni+4CONi(CO)4

If CO used in this process is obtained through a process, in which 6 g of carbon is mixed with 44 g CO2.

MEDIUM
JEE Main
IMPORTANT
Equal weight of 'X' (atomic weight=36) and 'Y' (atomic weight=24) react to form the compound, X2Y3.  If that is the case, then
MEDIUM
JEE Main
IMPORTANT
In a certain operation, 358 g of TiCl4 reacts with 96 g of Mg. Calculate the yield of Ti if 32 g of Ti is actually obtained  [atomic weight of Ti=48, atomic weight of Mg=24]
 
MEDIUM
JEE Main
IMPORTANT

NX is produced by the following steps of reaction: 

M+X2MX2

3MX2+X2M3X8

M3X8+N2CO3NX+CO2+M3O4

How much M (metal) is consumed to produce 206 g of NXTake Atomic weight M=56, N=23, X=80