But-2-yne is reacted separately with one mole of Hydrogen as shown below:
A. A is more soluble than B
B. B The boiling point & melting point of $A$ are higher and lower than $B$ respectively
C. A is more polar than $B$ because dipole moment of $A$ is zero
D. $Br _2$ adds easily to $B$ than $A$
Identify the incorrect statements from the options given below:
But-2-yne is reacted separately with one mole of Hydrogen as shown below:
A. A is more soluble than B
B. B The boiling point & melting point of $A$ are higher and lower than $B$ respectively
C. A is more polar than $B$ because dipole moment of $A$ is zero
D. $Br _2$ adds easily to $B$ than $A$
Identify the incorrect statements from the options given below:
A, C & D only
- A and B only
B, C & D only
- B and C only
The Correct Option is C
Solution and Explanation
Properties of Alkenes:
- Melting Point: The melting point of trans alkene is greater than that of cis alkene due to the higher symmetry of trans isomers, which allows better packing in the solid state.
- Boiling Point: The boiling point of cis alkene is greater than that of trans alkene due to stronger intermolecular forces, as cis isomers are more polar.
- Bromine Addition: Bromine (Br2) adds more easily to cis alkene than trans alkene because of the closer proximity of substituents in cis isomers.
- Isomers: A is cis–but–2–ene, and B is trans–but–2–ene.
- Solubility: A (cis–but–2–ene) is more soluble due to its polarity, as cis isomers have a net dipole moment.
The correct answer is option (C): B, C & D only
Top Questions on Hydrogen
Which of the following is/are correct with respect to the energy of atomic orbitals of a hydrogen atom?
(A) \( 1s<2s<2p<3d<4s \)
(B) \( 1s<2s = 2p<3s = 3p \)
(C) \( 1s<2s<2p<3s<3p \)
(D) \( 1s<2s<4s<3d \)
Choose the correct answer from the options given below:For hydrogen-like species, which of the following graphs provides the most appropriate representation of \( E \) vs \( Z \) plot for a constant \( n \)?
[E : Energy of the stationary state, Z : atomic number, n = principal quantum number]Consider the following data:
- Heat of formation of \( CO_2(g) \) = -393.5 kJ mol\(^{-1}\)
- Heat of formation of \( H_2O(l) \) = -286.0 kJ mol\(^{-1}\)
- Heat of combustion of benzene = -3267.0 kJ mol\(^{-1}\)
The heat of formation of benzene is ……… kJ mol\(^{-1}\) (Nearest integer).An ideal gas undergoes a cyclic transformation starting from point A and coming back to the same point by tracing the path A→B→C→D→A as shown in the three cases below.
Choose the correct option regarding \(\Delta U\):- The ratio of magnitude of potential energy and kinetic energy for \(5^{th}\) excited state of hydrogen atom is
Questions Asked in JEE Main exam
Given below are two statements:
Statement (I):
are isomeric compounds.
Statement (II):
are functional group isomers.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Isomerism
- A capillary tube of radius 0.1 mm is partly dipped in water (surface tension 70 dyn/cm and glass water contact angle $ \approx 0^\circ $) with $ 30^\circ $ inclined with vertical. The length of water risen in the capillary is ____ cm. (Take $ g = 9.8 $ m/s$^2 $)
- JEE Main - 2025
- Surface Tension
If the domain of the function \( f(x) = \frac{1}{\sqrt{3x + 10 - x^2}} + \frac{1}{\sqrt{x + |x|}} \) is \( (a, b) \), then \( (1 + a)^2 + b^2 \) is equal to:
- JEE Main - 2025
- Functions
A point particle of charge \( Q \) is located at \( P \) along the axis of an electric dipole 1 at a distance \( r \) as shown in the figure. The point \( P \) is also on the equatorial plane of a second electric dipole 2 at a distance \( r \). The dipoles are made of opposite charge \( q \) separated by a distance \( 2a \). For the charge particle at \( P \) not to experience any net force, which of the following correctly describes the situation?
- JEE Main - 2025
- Electrostatics and Work Done by Electric Field
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Choke coil is simply a coil having a large inductance but a small resistance. Choke coils are used with fluorescent mercury-tube fittings. If household electric power is directly connected to a mercury tube, the tube will be damaged.
Reason (R): By using the choke coil, the voltage across the tube is reduced by a factor \( \frac{R}{\sqrt{R^2 + \omega^2 L^2}} \), where \( \omega \) is the frequency of the supply across resistor \( R \) and inductor \( L \). If the choke coil were not used, the voltage across the resistor would be the same as the applied voltage.
In light of the above statements, choose the most appropriate answer from the options given below:- JEE Main - 2025
- electrostatic potential and capacitance
Concepts Used:
Dihydrogen
Dihydrogen is the homonuclear diatomic molecule built from two hydrogen atoms. This molecule characterizes a covalent bond between two hydrogen atoms, satisfying each of their required pair configurations.
Structure of Dihydrogen:
The dihydrogen molecule characterizes a single covalent bond between the two hydrogen atoms that comprise it. This molecule has a linear shape and is nonionic in nature. Each hydrogen atom comes up with one electron towards the covalent bond.
Properties of Dihydrogen:
- At Standard Temperature and Pressure (STP), dihydrogen exists in the gaseous state.
- The melting point of H2 is 13.99 Kelvin. Transforming this value to the celsius scale, the melting point of dihydrogen can be expressed as -259.16 degrees celsius.
- The boiling point correlated with dihydrogen corresponds to 20.271 on the Kelvins scale. Transforming this value into the celsius scale, the boiling point of H2 can be represented as -252.879 degrees celsius.
- The latent heat of fusion associated with the H2 molecule correlates to 0.117 kilojoules per mole.
- The latent heat of vaporization (also known as the enthalpy of vaporization) of dihydrogen is equivalent to 0.904 kilojoules per mole.