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Chemistry Redox Reactions

Volume strength of original peroxide solution is 16.8 V. Determine the molarity and normality of peroxide solution respectively:

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Raj Pandey

Contributor-Level 9

Normality $= \frac{Volume strength}{5.6} = \frac{16.8}{5.6} = 3$ $\frac{}{} \frac{}{}$

Molarity $= \frac{Normality}{n - factor} = \frac{3}{2} = 1.5$

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Chemistry Chemistry Hydrocarbon

The compound 'A' in the following Reaction is:
A →(1) O?, (2) Zn/H?O→ B + C
B →dil. KOH→ CH?-CH(OH)-CH?-CHO →HCN→ D
C →conc. KOH→ Benzyl alcohol + salt of Benzoic Acid
D →H?O?, Δ→ E

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Raj Pandey

Contributor-Level 9

Kindly consider the following Image

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3 months ago

Chemistry Class 11th

Which of the following statement is incorrect statement for photochemical smog?

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Raj Pandey

Contributor-Level 9

Photochemical smog has high concentration of oxidising agent like ${N O}_{2}$ $_{}$ and $_{}$ $O_{3}$ and is therefore called as oxidising agent.

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Chemistry Class 12th

The incorrect statement is:

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Raj Pandey

Contributor-Level 9

Chromate ion shape $=$ tetrahedral

But dichromate ion has only one common oxygen bond.

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Chemistry Class 12th

CMC is the particular concentration above which micelle formation takes place. CMC for soap lies between:

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Raj Pandey

Contributor-Level 9

Above a particular concentration called critical micelle concentration at which micelles are formed. for soaps, the $C M C$

is $10^{- 4}$ $^{}$ to $10^{- 3} m o l l^{- 1}$

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3 months ago

Chemistry Class 11th

Consider the following reaction:
(A substituted phenol reacts with H? and CrO?Cl to produce product 'P'.)
The product 'P' gives positive acetyl chloride test. This is because of the presence of which of these –OH group(s)?

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Raj Pandey

Contributor-Level 9

Kindly consider the following Image

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Chemistry Class 11th

Maximum number of different photons emitted when only two H atoms are placed in a container and each is present in 3rd excited state:

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Raj Pandey

Contributor-Level 9

$1^{st} H$ - atom

$n = 4$

$n = 1$

$4 \to 3,3 \to 2,2 \to 1$

$4 \to 1$ or $4 \to 3,3 \to 1$

or $4 \to 2,2 \to 1$

Hence, number of different lines possible $= 3 + 1 = 4$

Minimally, both can have same transition i.e $4 \to 1$ etc.

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Chemistry Chemical Equilibrium

A container contains O?, He and SO? gases such that mass of SO? is double the mass of O? and mass of He is half the mass of O? gas. The sum of mole fraction of all the gases is:

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Raj Pandey

Contributor-Level 9

Sum of mole fraction of all the gases is 1 .

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Chemistry Class 12th

The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is:
(a) Di-tert-butyl ketone
(b) Acetone
(c) Acetaldehyde
(d) p-Nitrobenzaldehyde

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Raj Pandey

Contributor-Level 9

Nucleophilic addition on carbonyl compounds decreases by increasing steric hindrance.

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Chemistry Class 12th

Consider the following molecules and statements related to them:
Molecule (P) is p-nitrophenol.
Molecule (Q) is o-nitrophenol.

(a) (Q) is more volatile than (P)
(b) (Q) has higher boiling point than (P)
(c) (P) dissolves more readily than (Q) in water
(d) pKa value of (P) is higher than (Q)

Identify the correct option from below:

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Raj Pandey

Contributor-Level 9

Due to Intramolecular hydrogen bonding, O-nitrophenol fails to spread its surface, so that its b.p is less than para-nitrophenol.

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