JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
What is the mass ratio of ethylene glycol \(\left( C _2 H _6 O _2\right.\), molar mass \(=62\,g / mol\) ) required for making \(500\,g\) of \(0.25\,molal\) aqueous solution and \(250\,mL\) of \(0.25\,molar\) aqueous solution ?
- A \(1: 1\)
- B \(3: 1\)
- C \(2: 1\)
- D \(1: 2\)
Answer & Solution
Correct Answer
(C) \(2: 1\)
Step-by-step Solution
Detailed explanation
Assume : Mass of solvent \(\approx\) Mass of solution Case \(I:-\) \(0.25=\frac{ W _1}{62} \times \frac{1000}{500}\) Case \(II:-\) \(0.25=\frac{ W _2}{62} \times \frac{1000}{250}\) \(\frac{ W _1}{ W _2}=\frac{2}{1}\)
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 the LIST-I with LIST-II
List-I
Deficiency DiseaseList-II
VitaminA. Scurvy I. Pyridoxine B. Convulsions II. Vitamin A C. Cheilosis III. Ascorbic Acid D. Xerophthalmia IV. Riboflavin
Choose the correct answer from the options given below:JEE Mains 2026 Medium - A \(50\, watt\) bulb emits monochromatic red light of wavelength of \(795\, \mathrm{~nm}\). The number of photons emitted per second by the bulb is \(\mathrm{x} \times 10^{20}\). The value of \(\mathrm{x}\) is ...... . \(\left[\right.\) Given \(: \mathrm{h}=6.63 \times 10^{-34} \,\mathrm{Js}\) and \(\left.\mathrm{c}=3.0 \times 10^{8} \,\mathrm{~ms}^{-1}\right]\)JEE Mains 2021 Medium
- Match List - I with List - II.
Choose the correct answer from the options given below :List - I (Reaction) List - II (Type of redox reaction) (A) Li (I) 589.2 (B) Na (II) 455.5 (C) Rb (III) 670.8 (D) Cs (IV) 780.0 JEE Mains 2024 Medium - The number of molecule(s) or ion(s) from the following having non-planar structure is \(NO _{3}^{-}, H _{2} O _{2},\)\( BF _{3},\)\( PCl _{3}, \)\(XeF _{4},\)\(SF _{4},\)\( XeO _{3}, \)\(PH _{4}^{+}, SO _{3},\left[ Al ( OH )_{4}\right]^{-}\)JEE Mains 2022 Medium
- Given below are two statements: one is labelled as Assertion \((A)\) and the other is labelled as Reason \((R)\). Assertion \((A)\): Cis form of alkene is found to be more polar than the trans form Reason \((R)\): Dipole moment of trans isomer of \(2\)-butene is zero. In the light of the above statements, choose the correct answer from the options given below :JEE Mains 2024 Medium
- Number of electrons present in \(4 \mathrm{f}\) orbital of \(\mathrm{Ho}^{3+}\) ion is \(.....\) (Given Atomic No. of \(\mathrm{Ho}=67\) )JEE Mains 2021 Easy
More PYQs from JEE Mains
- The slope of normal at any point \((x, y), x > 0, y > 0\) on the curve \(y=y(x)\) is given by \(\frac{x^{2}}{x y-x^{2} y^{2}-1}\) If the curve passes through the point \((1,1)\), then e. \(y(e)\) is equal toJEE Mains 2022 Hard
- The charge stored by the capacitor C in the given circuit in the steady state is _________ \(\mu C\).
JEE Mains 2026 Medium - The de Broglie wavelength of an oxygen molecule at \(27^{\circ} C\) is \(x \times 10^{-12} m\). The value of \(x\) is (take Planck's constant \(=6.63 \times 10^{-34} J . s\), Boltzmann constant \(=1.38 \times 10^{-23} J / K\), mass of oxygen. Molecule \(\left.=5.31 \times 10^{-26} kg\right)\).JEE Mains 2026 Hard
- The maximum possible denticities of a ligand given below towards a common transition and inner -transition metal ion, respectively, are
JEE Mains 2019 Hard - The distance travelled by an object in time \(t\) is given by \(s =(2 \cdot 5) t ^2\). The instantaneous speed of the object at \(t =5\,s\) will be \(....\,ms ^{-1}\)JEE Mains 2023 Easy
- In the circuit shown here, the voltage across \(L\) and \(C\) are respectively \(300\, V\) and \(400\, V\). The voltage \(E\) of the ac source is......\(Volt\)
JEE Mains 2013 Easy