JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
Complete combustion of \(750\, g\) of an organic compound provides \(420\, g\) of \(CO _{2}\) and \(210\, g\) of \(H _{2} O\). The percentage composition of carbon and hydrogen in organic compound is \(15.3\) and ............. respectively. (Round off to the Nearest Integer)
- A \(1\)
- B \(6\)
- C \(3\)
- D \(8\)
Answer & Solution
Correct Answer
(C) \(3\)
Step-by-step Solution
Detailed explanation
\(44 gm CO _{2}\), have \(12 gm\) carbon So, \(420 gm CO _{2} \Rightarrow \frac{12}{44} \times 420\) \(\Rightarrow \frac{1260}{11} gm\) carbon \(\Rightarrow 114.545\) gram carbon So, \(\%\) of carbon \(=\frac{114.545}{750} \times 100\) \(=15.3 \%\)…
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
- Match List \(I\) with List \(II\)
Choose the correct answer from the options given below:List \(I\) List \(II\) \(A\) \(\alpha\)-Glucose and \(\alpha\)-Galactose \(I\) Functional isomers \(B\) \(\alpha\)-Glucose and \(\beta\)-Glucose \(II\) Homologous \(C\) \(\alpha\)-Glucose and \(\alpha\)-Fructose \(III\) Anomers \(D\) \(\alpha\)-Glucose and \(\alpha\)-Ribose \(IV\) Epimers JEE Mains 2024 Medium - \(A \rightarrow B\) The above reaction is of zero order. Half life of this reaction is \(50\,min\). The time taken for the concentration of \(A\) to reduce to one-fourth of its initial value is \(...........\min\)(Nearest integer)JEE Mains 2023 Medium
- Which of the following electrolyte can be used to obtain \(\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8\) by the process of electrolysis?JEE Mains 2025 Hard
- A molecule with the formula \(\mathrm{AX}_4 \mathrm{Y}\) has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is :JEE Mains 2025 Medium
- Consider the reaction \(\mathrm{X}_2 \mathrm{Y}(\mathrm{~g})=\mathrm{X}_2(\mathrm{~g})+\frac{1}{2} \mathrm{Y}_2(\mathrm{~g})\)
The equation representing correct relationship between the degree of dissociation (x) of \(\mathrm{X}_2 \mathrm{Y}(\mathrm{g})\) with its equilibrium constant Kp is ______ .
Assume \(x\) to be very very small.JEE Mains 2025 Medium - In the reaction, \(C{H_3}COOH\xrightarrow{{LiAl{H_4}}}A\xrightarrow{{PC{l_5}}} \) \(B\xrightarrow{{Alc.\,KOH}}C,\) the product \(C\) is :JEE Mains 2014 Medium
More PYQs from JEE Mains
- Solute \(A\) associates in water. When \(0.7\, g\) of solute \(A\) is dissolved in \(42.0\, g\) of water, it depresses the freezing point by \(0.2^{\circ} C\). The percentage association of solute \(A\) in water, is \(.....\,\%\) [Given : Molar mass of \(A =93\, g\, mol ^{-1}\). Molal depression constant of water is \(1.86\, K \,kg\, mol ^{-1}\) ]JEE Mains 2022 Medium
- A satellite is launched into a circular orbit of radius \(‘R’\) around earth while a second satellite is launched into an orbit of radius \(1.02 R\). The percentage difference in the time periods of the two satellites is ......... \(\%\)JEE Mains 2021 Medium
- \(5.1\, g\, NH_4SH\) is introduced in \(3.0\, L\) evacuated flask at \(327\,^oC\). \(30\%\) of the solid \(NH_4SH\) decomposed to \(NH_3\) and \(H_2S\) as gases. The \(K_p\) of the reaction at \(327\,^oC\) is (\(R = 0.082\, L\, atm\, mol^{-1}\, K^{-1}\), Molar mass of \(S = 32\, g\, mol^{-1}\), molar mass of \(N = 14\, g\, mol^{-1}\))JEE Mains 2019 Hard
- Let \(A=\{-4,-3,-2,0,1,3,4\}\) and \(R =\{( a , b ) \in A\) \(\times A : b =| a |\) or \(\left.b ^2= a +1\right\}\) be a relation on \(A\). Then the minimum number of elements, that must be added to the relation \(R\) so that it becomes reflexive and symmetric, is \(........\).JEE Mains 2023 Medium
- A die is thrown two times and the sum of the scores appearing on the die is observed to be a multiple of \(4\). Then the conditional probability that the score \(4\) has appeared at least once isJEE Mains 2020 Medium
- Let \(A=\{1,2,3,4,5\}\) and \(B=\{1,2,3,4,5,6\}\). Then the number of functions \(f: A \rightarrow B\) satisfying \(f(1)+f(2)=f(4)-1\) is equal toJEE Mains 2023 Hard