Some Basic Conc...

"Equal volumes of all gases at the same temperature and pressure contain equal number of particles." This statement is a direct consequence of:

$$40\,mL $$ gaseous mixture of $$CO , CH_4 $$ and Ne was exploded with $$ 10\,mL $$ of oxygen. On cooling the gases occupied $$36.5\,mL $$. After treatment with KOH the volume reduced by $$9\,mL $$ again on treatment with alkaline pyrogallol, the volume further reduced. 
Percentage of $$CH_{4} $$ in the original mixture is:

$$4$$ mole of a mixture of Mohr's salt and $$Fe_2(SO_4)_3 $$ requires $$500\,mL $$ of $$1\,M \,K_2Cr_2O_7 $$ for complete oxidation in acidic medium. The mole % of the Mohr's salt in the mixture is:

For the reaction , $$2Fe(NO_3)_3 +3 Na_2CO_3 \rightarrow Fe_{2}(CO_3)_3 + 6NaNO_{3}$$ 
Initially if $$2.5 $$ mole of $$Fe(NO_3)_2 $$ and $$3.6 $$ mole of $$Na_{2}CO_{3} $$ is taken. If $$6.3$$ mole of $$ NaNO_{3}$$ is obtained then % yield of given reaction is :

Which of the following fertilizers has the highest nitrogen percentage?

$$Na_2SO_3. xH_2O$$ has 50% $$ H_2O $$ by mass. Hence, $$x$$ is:

Which of the following statements is correct about the reaction given below?
$$\displaystyle 4Fe\left ( s \right )+3O_{2}\left ( g \right )\rightarrow 2Fe_{2}O_{3}\left ( g \right )$$

Which among the following is true about one mole of a gas?

1.84 g of Dolomite $$(CaMg(CO_3)_2)$$ ore was heated resulting in a residue of constant weight 0.96 g. During heating the metal of one of the products burnt with a brick red flame and the second burnt with a dazzling white flame. The approximate percentage composition of the two products in the residue are respectively

$$5$$ g of crystalline salt, when rendered anhydrous, lost $$1.89$$ g of water. The formula weight of anhydrous salts is $$160$$. The number of molecules of water of crystallisation in the salt is: