Some Basic Concepts of Chemistry

What is the mass of the precipitate formed when 50 mL of $16.9%$ solution of $AgNO_{3}$ is mixed with 50 mL of $5.8%$ NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5)

What mass of $95%$pure $\mathrm{CaCO}_{3}$ will be required to neutralise$50\mathrm{mL}$ of $0.5M\mathrm{HCl}$ solution according to the following reaction?…

The mass of carbon anode consumed (giving only carbon dioxide) in the production of $270 \mathrm{~kg}$ of a aluminium metal from bauxite by the Hall process is: (Atomic mass : A1 = 27)

$5$ moles of $AB_{2}$ weigh $125\times\,10^{-3}kg$ and $10$ moles of $A_{2}B_{2}$ weigh $300\times\,10^{-3}kg$ . The molar mass of A $(M_{A})$ in $kgmol^{-1}$ are:

When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is_______ - (Nearest integer) Given : Molar mass of Al is $27.0 \mathrm{~g} \mathrm{~mol}^{-1}$…

A $1.84\mathrm{mg}$ sample of polyhydric alcoholic compound '$X$' of molar mass $92.0g/\mathrm{mol}$ gave $1.344\mathrm{mL}$ of $H_{2}$ gas at STP. The number of alcoholic hydrogen present in compound '$X$' is

Consider the reaction $4\mathrm{HNO}_{3}\left(l\right)+3\mathrm{KCl}\left(s\right)\rightarrow\,\mathrm{Cl}_{2}\left(g\right)+\mathrm{NOCl}\left(g\right)+2H_{2}O\left(g\right)+3\mathrm{KNO}_{3}\left(s\right)$ The amount…

Number of hydrogen atoms per molecule of a hydrocarbon A having $85.8%$carbon is (Given : Molar mass of $A=84g\mathrm{mol}^{-1}$)

Consider the following reaction occurring in the blast furnace: $\mathrm{Fe}_3 \mathrm{O}_{4(\mathrm{~s})}+4 \mathrm{CO}_{(\mathrm{g})} \rightarrow 3 \mathrm{Fe}_{(\mathrm{l})}+4 \mathrm{CO}_{2(\mathrm{~g})}$ ' $x$ ' kg…

Number of moles of methane required to produce $22g\mathrm{CO}_{2(g)}$ after combustion is $x\times\,10^{-2}$moles. The value of $x$ is

Production of iron in blast furnace follows the following equation $\mathrm{Fe}_{3}O_{4}\left(s\right)+4\mathrm{CO}\left(g\right)\rightarrow\,3\mathrm{Fe}\left(l\right)+4\mathrm{CO}_{2}\left(g\right)$ when…

$1g$ of a carbonate $\left(M_{2}\mathrm{CO}_{3}\right)$ on treatment with excess $\mathrm{HCl}$ produces $0.01\mathrm{mol}$ of $\mathrm{CO}_{2}$. The molar mass of $M_{2}\mathrm{CO}_{3}$is $\mathrm{gmol}^{-1}$. (Nearest…