Some Basic Conc...

$$3 g$$ of activated charcoal was added to $$50 mL$$ of acetic acid solution ($$0.06 N$$) in a flask. After an hour it was filtered and the strength of the filtrate was found to be $$0.042 N$$. The amount of acetic acid absorbed (per gram of charcoal) is ?

A substance contains 3.4%$$S$$. if it contain two atom of sulphur per molecule then minimum molecular weight of substance will be:

The number of $$H_{3}O^{+}$$ ions present in 10ml of water at $$25^{\circ}C$$ is:

The volume of $$0.1\ M\ H_2SO_4$$ required to neutralize 30 mL of $$2.0\ M\ NaOH$$ is:

Two oxide of metal contain 27.6% and 30% oxygen respectively. If the formula of first oxide is $$M_3O_4 $$ then formula of second oxide is -

$$81gm$$ mixture of $$MgC{O_3}\left( s \right)$$ $$N{H_2}COON{H_4}\left( s \right)$$ in equimolar ratio is heated in open to constant mass. If vapour density of gaseous mixture evolved was found to be $$\cfrac{61}{4}$$, then find the mole % of $$MgCO_3$$ in original sample.

A mixture of $${ C }_{ 2 }{ H }_{ 2 }$$ AND  $${ C }_{ 3 }{ H }_{ 8 }$$ occupied a certain volume at 80 mm Hg . The mixture wsa completely burnt to $${ CO }_{ 2 }$$ and $${ H }_{ 2 }O$$ (l). When the pressure of $${ CO }_{ 2 }$$ was found to be 230 mm Hg at the same temperature and volume, the mole fraction of $${ C }_{ 3 }{ H }_{ 8 }$$  in the mixture is 

Vapour density of the equilibrium mixture of $$NO_2$$ and $$N_2O_4$$ is found to be $$40$$ for the equilibrium. Calculate percentage of $$NO_2$$ in the mixture:  $$N_2O_4 \leftrightharpoons 2 NO_2$$

0.1 g of a solution containing $${ Na }_{ 2 }$$$$ { Co }_{ 3 }$$ and $${ NaHCO }_{ 3 }$$ requires 10 mL of 0.01 N HCl for neutralization using phenolphthalein as an indicator.Wt.% of  $${ Na }_{ 2 }$$$$ { Co }_{ 3 }$$ in the mixture is