Some Basic Concepts of Chemistry

A mixture of $2.3g$formic acid and $4.5g$oxalic acid is treated with concentrate$H_{2}\mathrm{SO}_{4}$. The evolved gaseous mixture is passed through $\mathrm{KOH}$ pellets. What will be the weight in grams of the…

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)

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)

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?…

$0.05\mathrm{cm}$ thick coating of silver is deposited on a plate of $0.05m^{2}$area. The number of silver atoms deposited on plate are_______$\times\,10^{23}$. (At mass Ag $\left=108,d=7.9g\mathrm{cm}^{-3}\right)$…

20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium iodide solution is ________ M. (Nearest Integer value) (Given : $\mathrm{Na}=23,…

Butane reacts with oxygen to produce carbon dioxide and water following the equation given below $\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+\frac{13}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow 4…

$10\mathrm{mL}$ of gaseous hydrocarbon on combustion gives $40\mathrm{mL}$ of $\mathrm{CO}_{2}\left(g\right)$ and $50\mathrm{mL}$ of water vapour. Total number of carbon and hydrogen atoms in the hydrocarbon is _______.

The molarity of a $70 \%$ (mass $/$ mass) aqueous solution of a monobasic acid $(\mathrm{X})$ is __________ $\times 10^{-1}$ M(Nearest integer) [Given: Density of aqueous solution of (X) is $1.25 \mathrm{~g}…

20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is _______ $\times 10^{-2} \mathrm{M}$. (Nearest integer)

An organic compound gives $0.220g$ of $\mathrm{CO}_{2}$and $0.126g$ of $H_{2}O$ on complete combustion. If the $%$ of carbon is $24$ then the $%$ of hydrogen is $_________\times\,10^{-1}.$ (Nearest integer)

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