JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
What volume of hydrogen gas at STP would be liberated by action of \(50\text{ mL}\) of \(H_2SO_4\) of \(50\%\) purity (density \(= 1.3\text{ g mL}^{-1}\)) on \(20\text{ g}\) of zinc ?
Given : Molar mass of H, O, S, Zn are \(1, 16, 32, 65\text{ g mol}^{-1}\) respectively.
- A \(5.824\text{ L}\)
- B \(7.428\text{ L}\)
- C \(6.892\text{ L}\)
- D \(8.375\text{ L}\)
Answer & Solution
Correct Answer
(C) \(6.892\text{ L}\)
Step-by-step Solution
Detailed explanation
Mass of \(H_2SO_4\) solution \(= 50 \times 1.3 = 65\text{ g}\) Mass of pure \(H_2SO_4 = 65 \times \dfrac{50}{100} = 32.5\text{ g}\) Moles of \(H_2SO_4 = \dfrac{32.5}{98} \approx 0.3316\text{ mol}\) Moles of \(Zn = \dfrac{20}{65} \approx 0.3077\text{ mol}\) The balanced chemical…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The graph between \({\left| \psi \right|^2}\) and \(r\)(radial distance) is shown below. This represents
JEE Mains 2019 Medium - For a \(\mathrm{Mg}\left|\mathrm{Mg}^{2+}(\mathrm{aq})\right|\left|\mathrm{Ag}^{+}(\mathrm{aq})\right| \mathrm{Ag}\) the correct Nernst Equation is _______.JEE Mains 2025 Easy
- Given below are two statements: Statement \(I :\) Aniline is less basic than acetamide. Statement \(II :\) In aniline, the lone pair of electrons on nitrogen atom is delocalised over benzene ring due to resonance and hence less available to a proton. Choose the most appropriate option:JEE Mains 2021 Hard
- Consider the following first order gas phase reaction at constant temperature \(\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})\) If the total pressure of the gases is found to be \(200\) torr after \(23 \mathrm{sec}\). and \(300\) torr upon the complete decomposition of \(\mathrm{A}\) after a very long time, then the rate constant of the given reaction is _______ \(\times 10^{-2} \mathrm{~s}^{-1}\) (nearest integer) [Given : \(\log _{10}(2)=0.301\) ]JEE Mains 2024 Medium
- X and Y are the number of electrons involved, respectively during the oxidation of \( I^{-} \) to \( I_{2} \) and \( S^{2-} \) to S by acidified \( K_{2}Cr_{2}O_{7} \). The value of X + Y is ______.JEE Mains 2026 Easy
- Acid \(\mathrm{D}\) formed in above reaction is _______.
JEE Mains 2024 Hard
More PYQs from JEE Mains
- Two bodies of masses \(m_{1}=5\,kg\) and \(m _{2}=3\,kg\) are connected by a light string going over a smooth light pulley on a smooth inclined plane as shown in the figure. The system is at rest. The force exerted by the inclined plane on the body of mass \(m _{1}\) will be\(....N\) [Take \(g=10\,ms ^{-2}\) ]
JEE Mains 2022 Hard - Let \(3,6,9,12, \ldots\) upto \(78\) terms and \(5,9,13,17, \ldots\) upto \(59\) terms be two series. Then, the sum of the terms common to both the series is equal toJEE Mains 2022 Easy
- An inductor coil stores \(64\, {J}\) of magnetic field energy and dissipates energy at the rate of \(640\, {W}\) when a current of \(8\, {A}\) is passed through it. If this coil is joined across an ideal battery, find the time constant of the circuit in secondsJEE Mains 2021 Hard
- Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below :JEE Mains 2025 Hard - The coordinates of centre of mass of a uniform flag shaped lamina (thin flat plate) of mass \(4\;kg\). (The coordinates of the same are shown in figure) are
JEE Mains 2020 Medium - Let \(\vec{a}=\hat{i}+2 \hat{j}+\hat{k}, \vec{b}=3 \hat{i}-3 \hat{j}+3 \hat{k}\), \(\overrightarrow{\mathrm{c}}=2 \hat{\mathrm{i}}-\hat{\mathrm{j}}+2 \hat{\mathrm{k}}\) and \(\overrightarrow{\mathrm{d}}\) be a vector such that \(\overrightarrow{\mathrm{b}} \times \overrightarrow{\mathrm{d}}=\overrightarrow{\mathrm{c}} \times \overrightarrow{\mathrm{d}}\) and \(\overrightarrow{\mathrm{a}} \cdot \overrightarrow{\mathrm{d}}=4\). Then \(|(\overrightarrow{\mathrm{a}} \times \overrightarrow{\mathrm{d}})|^2\) is equal to ______ .JEE Mains 2025 Easy