Many a time the reaction are carried out when the reactants are not present in the amounts required by a balanced chemical reaction. In such situations, one reactant is in excess over other. The reactant which is present in th lesser amount gets conserved after sometime and after that no further reaction takes place whatever be the amount of other reactant is present .Hence, the reactant which gets consumed , limits the amount of products formed and is therefore called limiting reagent. To determine the limiting reagent find the value of `phi` which is the ratio of (given) mole of a substance to the stoichiometric coefficient of that substance . The limiting reagent is the reagent which has minimum value of `phi`. The reduction of `Cr_(2)O+_(3)` by Al proceeds quantitatively on ignition of a suitable fuse. The reaction is : `2Al +Cr_(2)O_(3) rarr Al_(2)O_(3) +2Cr` How much metallic chromium can be made by bringing to reaction temperature a mixture of 5 kg Al and 20 kg `Cr_(2)O_(3)` ?A. 9.6 kgB. 14.4 kgC. 5.9 kgD. 1.41 kg

Many a time the reaction are carried out when the reactants are not pr

1.	Many a time the reaction are carried out when the reactants are not present in the amounts required by a balanced chemical reaction. In such situations, one reactant is in excess over other. The reactant which is present in th lesser amount gets conserved after sometime and after that no further reaction takes place whatever be the amount of other reactant is present .Hence, the reactant which gets consumed , limits the amount of products formed and is therefore called limiting reagent. To determine the limiting reagent find the value of `phi` which is the ratio of (given) mole of a substance to the stoichiometric coefficient of that substance . The limiting reagent is the reagent which has minimum value of `phi`. The reduction of `Cr_(2)O+_(3)` by Al proceeds quantitatively on ignition of a suitable fuse. The reaction is : `2Al +Cr_(2)O_(3) rarr Al_(2)O_(3) +2Cr` How much metallic chromium can be made by bringing to reaction temperature a mixture of 5 kg Al and 20 kg `Cr_(2)O_(3)` ?A. 9.6 kgB. 14.4 kgC. 5.9 kgD. 1.41 kg
Answer» Correct Answer - A

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A compound `H_(2)X` with molar mass of 80 g is dissolved in a solvent having density of `0.4 g mL^(-1)`. Assuming no change in volume upon dissolution, what is the molality of 3.2 M solution of the compound ?
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`4.0 g` of a mixture of `Nacl` and `Na_(2) CO_(3)` was dissolved in water and volume made up to `250 mL`. `25 mL` of this solution required `50 mL` of `N//10 HCl` for complete neutralisation. Calculate the percentage composition of the original mixture.
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