Chemistry

Contributor-Level 10

Complete reaction of acid rain is

$2 S O_{2} + O_{2} + 2 H_{2} O \overset{}{\to} 2 H_{2} S O_{4} (a c i d r a i n)$

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3 months ago

Which statement is not true with respect to nitrate ion test?

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Contributor-Level 10

Brown ring is formed due to nitrosoferrous sulphate formation.

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3 months ago

Chemistry Class 11th

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

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Contributor-Level 10

Borax forms basic buffer solution in aqueous medium

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3 months ago

A chemical which stimulates the secretion of pepsin is:

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Contributor-Level 10

Histamine is the chemical which stimulates the secretion of pepsin in stomach.

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3 months ago

Chemistry Class 11th

Number of lone pair(s) of electrons on central atom and the shape of BrF₃ molecule respectively.

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3 months ago

Chemistry Class 11th

Amongst baking soda, caustic soda and washing soda, carbonate anion is present

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Contributor-Level 10

Baking soda = NaHCO₃

Washing soda = Na₂CO₃. 10H₂O

Caustic soda = NaOH

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3 months ago

Which of the following sets are correct regarding polymer?

(A) Copolymer: Buna-S

(B) Condensation polymer: Nylon-6,6

(C) Fibres: Nylon-6,6

(D) Thermosetting polymer: Terylene

(E) Homopolymer: Buna-N

Choose the correct answer form given options below:

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Contributor-Level 10

Buna-S is the copolymer of butadiene and styrene, Nylon-6, 6 is the condensation polymer of adipic acid and diamine and having fibrous nature.

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3 months ago

Given below are two statements:

Statement I : In CuSO₄.5H₂O, Cu-O bonds are present

Statement II : In CuSO₄.5H₂O, ligands coordinating with Cu(II) ion are O- and S- based ligands

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

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Contributor-Level 10

From the given structure of CuSO₄. 5H₂O Cu (II) ion and oxygen bonds are present but ligands coordinating with Cu (II) ion are not O and S both.

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3 months ago

Among the following structure, which will show the most stable enamine formation?

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Contributor-Level 10

Enamines are inter conversible and have low stability with respect to imine. Among all C is most stable due to steric factor.

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3 months ago

Match List – I with List – II:

List – I (Ore) List – II (Composition)

(A) Siderite

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