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6 months ago

Chemistry Structure of Atom

Identify the incorrect statement from the following.

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Vishal Baghel

Contributor-Level 10

Shapes of d? ²? ² and d? ² are not similar to each other.

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6 months ago

Chemistry Chemistry Chemical Kinetics

The given graph is a representation of kinetics of a reaction.

The y and x axes respectively are for zero and first order reactions, respectively are:

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Vishal Baghel

Contributor-Level 10

For a zero-order reaction Rate Vs conc graph will be straight line parallel to the x-axis.
For a 1st order reaction t? /? vs concentration will again be a straight line parallel to x-axis.

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6 months ago

Chemistry Class 11th

Given below are two statements:

Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.

Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

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Vishal Baghel

Contributor-Level 10

At different positions -NO? affects acidic strength differently. The order of acidic strength is p-nitrophenol > o-nitrophenol > m-nitrophenol.

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New question posted

6 months ago

Chemistry Class 11th

Given below are two statements:

Statement I:
The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.

Statement II:
o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

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New answer posted

6 months ago

Chemistry Thermodynamics

Which of the following p – V curve represents maximum work done?

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Vishal Baghel

Contributor-Level 10

Maximum work is done in the case where area under the curve is maximum.

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6 months ago

Chemistry Chemistry Electrochemistry

Given below are half cell reactions:
MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O, E°(Mn²⁺/MnO₄⁻) = -1.510 V
½O₂ + 2H⁺ + 2e⁻ → H₂O, E°(O₂/H₂O) = +1.223 V

Will the permanganate ion, MnO₄⁻liberate O₂ from water in the presence of an acid?

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Vishal Baghel

Contributor-Level 10

E°_cell = E°_cathode - E°_anode = (+1.510) - (1.229) = +0.287 V. As E°_cell is positive the cell will work.

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6 months ago

Chemistry Class 11th

Which amongst the following is incorrect statement?

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Vishal Baghel

Contributor-Level 10

O? (15) will have configuration σ1s²σ1s²σ2s²σ2s²σ2p? ² (π2p? ²=π2p? ²) (π*2p? ¹). This ion is paramagnetic.

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6 months ago

Chemistry The d and f Block Elements

Gadolinium has a low value of third ionisation enthalpy because of:

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Vishal Baghel

Contributor-Level 10

Gadolinium has outer configuration of [Xe]4f?5d¹6s².
Its third ionization energy is low due to highly exchange energy and hence stability of the half-filled f subshell.

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6 months ago

Chemistry Class 12th

The incorrect statement regarding enzymes is:

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