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Chemistry Structure of Atom

In which transition, in a sample of H atoms, only one type of photon is emitted?

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Vishal Baghel

Contributor-Level 10

Only in n = 2 → n = 1 (one single type of photon is emitted)

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Chemistry Class 11th

CNG is an important transportation fuel. When 100g CNG is mixed with 208g oxygen in vechicles, it leads to the formation of CO₂ and H₂O and produces large quantity of heat during this combustion, then the amount of carbon dioxide produced in germs is ______.

(nearest integer)

[Assume CNG to be methane]

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Raj Pandey

Contributor-Level 9

$C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

Mole $\frac{100}{16} \frac{208}{32}$

$\begin{array}{l} ↓ ↓ \\ 6.25 6.5 (H e r e O_{2} i s t h e l i m i t i n g r e a g e n t) \end{array}$

Hence mole of CO₂ formed = $\frac{6.5}{2}$

And wt of CO₂ in gm = $\frac{6.5}{2} * 44 = 143 g$

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Chemistry Electrochemistry

1 mole of K₂Cr₂O₇ cannot oxidise

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Vishal Baghel

Contributor-Level 10

Meq of K? Cr? O? is greater than all the other given species.

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Chemistry Class 11th

Does bromine water test work for alkynes?

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Aadit Singh Uppal

Contributor-Level 10

Bromine water test is a technique used for the identification of alkynes. Alkynes on coming in contact with bromine turn them colourless from reddish brown color. This happens because of the addition reaction which takes place due to the triple carbon bonds of alkynes.

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Chemistry Class 12th

Kindly consider the following

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alok kumar singh

Contributor-Level 10

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Chemistry Class 11th

Consider the reactions

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Chemistry Class 12th

Consider the following statements about amines and select the incorrect one.

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Vishal Baghel

Contributor-Level 10

Diazonium salts of aromatic amines are more stable

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Chemistry Chemistry Organic Chemistry

Given below are two statements:
Statement I: Hyper conjugation is permanent effect.
Statement II: Hyper conjugation in ethyl cation (CH₃—CH₂⁺) involves the overlapping of Csp² – H₁ₛ bond with empty 2p orbital of other carbon.
Choose the correct option:

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alok kumar singh

Contributor-Level 10

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Chemistry Class 12th

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is:

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alok kumar singh

Contributor-Level 10

Lactose is a disaccharide which is formed by forming C? -C? glycosidic linkage between D-galactose and D- glucose.
Lactose - (Hydrolysis)-> D - galactose + D - glucose

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Chemistry Class 12th

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: SO₂(g) is adsorbed to a larger extent than H₂(g) on activated charcoal.
Reason R: SO₂(g) has a higher critical temperature than H₂(g).
In the light of the above statements, choose the most appropriate answer from the option given below.

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alok kumar singh

Contributor-Level 10

SO? is adsorbed more than H? on activated charcoal as critical temperature of SO? is higher than H? As higher the critical temperature, easier is liquifaction of gas and more is adsorption of gas on charcoal.

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