JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
The amount of calcium oxide produced on heating 150 kg limestone ( \(75 \%\) pure) is ______ kg. (Nearest integer)
Given : Molar mass (in \(\mathrm{g} \mathrm{mol}^{-1}\)) of Ca-40, O-16, C-12
- A 60
- B 63
- C 66
- D 67
Answer & Solution
Correct Answer
(B) 63
Step-by-step Solution
Detailed explanation
\begin{aligned} & \mathrm{CaCO}_3 \rightarrow \mathrm{CaO}+\mathrm{CO}_2 \\ & \text { mass of } \mathrm{CaCO}_3=\frac{150 \times 75}{100}=112.5 \mathrm{~kg} \\ & =112500 \mathrm{~g} \\ & \mathrm{n}_{\mathrm{CaCO}_3}=1125 \\ & \mathrm{So} \text { moles of } \mathrm{CaO}=1125 \\ &…
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
- Aqueous solution of which salt will not contain ions with the electronic configuration \(1s^2\,2s^2\,2p^6\,3s^2\,3p^6\) ?JEE Mains 2016 Medium
- Consider the following reactions.
\( PbCl_{2}+K_{2}CrO_{4}\rightarrow A+2KCl \)
(Hot solution)
\( A+NaOH\rightleftharpoons B+Na_{2}CrO_{4} \)
\( PbSO_{4}+4CH_{3}COONH_{4}\rightarrow(NH_{4})_{2}SO_{4}+X \)
In the above reactions, A, B and X are respectively.JEE Mains 2026 Hard - In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of \(Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)\)JEE Mains 2023 Medium
- The de-Broglie's wavelength of electron present in first Bohr orbit of \('H'\) atom isJEE Mains 2018 Hard
- Given below are two statements:
Statement I: The number of pairs among \([\text{Ti}^{4+}, \text{V}^{2+}]\), \([\text{V}^{2+}, \text{Mn}^{2+}]\), \([\text{Mn}^{2+}, \text{Fe}^{3+}]\) and \([\text{V}^{2+}, \text{Cr}^{2+}]\) in which both ions are coloured is \(3\).
Statement II: The number of pairs among \([\text{La}^{3+}, \text{Yb}^{2+}]\), \([\text{Lu}^{3+}, \text{Ce}^{4+}]\) and \([\text{Ac}^{3+}, \text{Lr}^{3+}]\) ions in which both are diamagnetic is \(3\).
In the light of the above statements, choose the correct from the options given below:JEE Mains 2026 Hard - If a compound \(Ab\) dissociates to the extent of \(75 \,\%\) in an aqueous solution, the molality of the solution which shows a \(2.5\, K\) rise in the boiling point of the solution is ...... molal. (Rounded-off to the nearest integer) \(\left[ K _{ b }=0.52 \,K \,kg\, mol ^{-1}\right]\)JEE Mains 2021 Medium
More PYQs from JEE Mains
- The color of \(KMnO_4\) is due to :JEE Mains 2015 Hard
- The least number of oxyacids are formed byJEE Mains 2015 Hard
- The area (in sq. units) bounded by the parabola \(y = x^2 -1\), the tangent at the point \((2, 3)\) into it and the \(y -\) axis isJEE Mains 2019 Hard
- The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is _______.
JEE Mains 2024 Medium - The magnetic field at the centre of a current carrying circular loop of radius \(R\) is 16 \(\mu\)T. The magnetic field at a distance \(x = \sqrt{3}R\) on its axis from the centre is ________ \(\mu\)T.JEE Mains 2026 Medium
- The gap between the plates of a parallel plate capacitor of area \(A\) and distance between plates \(d\), is filled with a dielectric whose permittivity varies linearly from \({ \varepsilon _1}\) at one plate to \({ \varepsilon _2}\) at the other. The capacitance of capacitor isJEE Mains 2014 Hard