Some Basic Concepts of Chemistry

From the given information, select the suitable law of chemical combination:Cupric Carbonate% of Cu% of C% of ONatural Sample51.359.7438.91Synthetic Sample51.359.7438.91

Match List-I with List-II and select the correct option (Based on mole concept):List-IList-II(a)$2$ moles of ethene(i)$11.2$ L volume at STP(b)Mass is equal to $66$ g(ii)$56$ g(c)$1$ g of $\text{H}_2$(iii)$12.04 \times 10^{23}$ Molecules(d)...

Select the INCORRECT statement/s from the following:
(a) 22 books have infinite significant figures
(b) In the answer of calculation $2.5 \times 1.25$ has four significant figures,.
(c) Zero's preceding to first non-zero digit are significa...

Which of the following methods of expressing concentration are unitless?

0.48 g of an organic compound on complete combustion produced 0.22 g of $\mathrm{CO}_2$. The percentage of C in the given organic compound is

An aqueous solution of alcohol contains \(18 \mathrm{~g}\) of water and \(414 \mathrm{~g}\) of ethyl alcohol. The mole fraction of water is

A pure compound contains \(2.4 \mathrm{~g}\) of \(\mathrm{C}, 1.2 \times 10^{23}\) atoms of \(\mathrm{H}, 0.2\) moles of oxygen atoms. Its empirical formula is

\(0.4 \mathrm{~g}\) of dihydrogen is made to react with \(7.4 \mathrm{~g}\) of dichlorine to form hydrogen chloride. The volume of hydrogen chloride formed at \(273 \mathrm{~K}\) and \(1 \mathrm{~bar}\) pressure is

A gas mixture contains \(25 \% \mathrm{~He}\) and \(75 \% \mathrm{~CH}_4\) by volume at a given temperature and pressure. The percentage by mass of methane in the mixture is approximately _________.

A metal exists as an oxide with formula \(M_{0.96}\) O. Metal, \(M\) can exist as \(M^{2+}\) and \(M^{3+}\) in its oxide \(M_{0.96} \mathrm{O}\). The percentage of \(\mathrm{M}^{3+}\) in the oxide is nearly

The mass of \(\mathrm{AgCl}\) precipitated when a solution containing \(11.70 \mathrm{~g}\) of \(\mathrm{NaCl}\) is added to a solution containing \(3.4 \mathrm{~g}\) of \(\mathrm{AgNO}_3\) is [Atomic mass of \(\mathrm{Ag}=108\), Atomic mas...

1.0 g of Mg is burnt with 0.28 g of $\mathrm{O}_2$ in a closed vessel. Which reactant is left in excess and how much?

If $3.01 \times 10^{20}$ molecules are removed from 98 mg of $\mathrm{H}_2 \mathrm{SO}_4$, then number of moles of $\mathrm{H}_2 \mathrm{SO}_4$ left are

Select wrong chemical reaction among the following.