Chemistry

What is the correct sequence of reagents used for converting nitrobenzene into m- dibromobenzene?

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Kindly consider the following figure

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In polymer Buna – S : 'S' stands for:

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S -> styrene

Buta-1, 3-diene Styrene

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Chemistry Hydrocarbons

Which one of the following carbonyl compound cannot be prepared by addition of water on an alkyne in the presence of HgSO₂ and H₂SO₄?

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Hence

CH₃ – CH₂ – CHO can't be formed.

In case of unsymmetrical alkynes, more positive charge stabilizing carbon attacked by H₂O and finally converted into carbonyl.

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The calculated magnetic moments (spin only value) for species ${[F e C l_{4}]}^{2 -}, {[C o {(C_{2} O_{4})}_{3}]}^{3 -}$ and $M n O_{4}^{2 -}$

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${[F e C l_{4}]}^{2 -} \Rightarrow$

$\begin{array}{l} n = 4 \\ μ = \sqrt[]{4 (4 + 2)} \\ = 4.90 B M \end{array}$

[Co (C₂O₄)₃]³^- Þ Co³⁺

Co => [Ar]4s²3d⁷

Co⁺³ = [Ar]4s⁰3d⁶

$μ = \sqrt[]{n (n + 2)} = \sqrt[]{1 (3)} = 1.73 B M$

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The correct set from the following in which both pairs are in correct order of melting point is:

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MgO has more lattice enthalpy than NaCl

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.

Reason R : Hydrogen is the lightest element

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

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Hydrogen is most abundant element in earth crust and the lightest element. But in troposphere nitrogen gas in most abundant element

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Which one of the following compounds is non-aromatic?

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Kindly consider the following figure

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The incorrect statement among the following is:

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VOSO₄ -> V⁴⁺ Reducing agent

Cr₂O₃ -> Amphoteric oxide

Red colour of ruby due to Cr³⁺ present in Al₂O₃

Ru⁸⁺ -> oxidizing agent

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Match List – I and List – II

Choose the correct answer from the options given below:

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Kindly consider the following figure

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7 months ago

Match List – I with List – II

List – I List – II

(Metal) &n

...more

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