Questions in chemical-aritmatic

Select	Question
	If isobutane and n-butane are present in a gas, then how much oxygen should be required for complete combustion of 5 kg of this gas
	16.8 litre gas containing ${H_2}$ and ${O_2}$is formed at NTP on electrolysis of water. What should be the weight of electrolysed water
	On electrical decomposition of 150 ml dry and pure ${O_2}$, 10% of ${O_2}$gets changed to O, then the volume of gaseous mixture after reaction and volume of remaining gas left after passing in turpentine oil will be
	What should be the weight of 50% $HCl$ which reacts with 100 g of limestone
	What should be the weight and moles of $AgCl$ precipitate obtained on adding $500ml$ of 0.20 M $HCl$in 30 g of $AgN{O_3}$solution? ($AgN{O_3}$= 170)
	A solution of 10 ml $\frac{M}{{10}}FeS{O_4}$ was titrated with $KMn{O_4}$ solution in acidic medium. The amount of $KMn{O_4}$ used will be
	1.12 ml of a gas is produced at STP by the action of 4.12 mg of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is
	The simplest formula of a compound containing 50% of element $X$ (atomic mass 10) and 50% of element $Y$ (atomic mass 20) is
	A compound contains atoms of three elements in $A$, $B$ and $C$. If the oxidation number of $A$ is +2, $B$ is +5 and that of $C$ is – 2, the possible formula of the compound is
	What will be the volume of $C{O_2}$ at NTP obtained on heating 10 grams of (90% pure) limestone