A protein solution on warming with concentrated HNO3 may turn yellow. This test is called : (a) Xanthoproteic test (b) Ninhydrin test (c) Biuret test (d) Million's test

A protein solution on warming with concentrated HNO3 may turn yellow.
This test is called :
(a) Xanthoproteic test
(b) Ninhydrin test
(c) Biuret test
(d) Million's test
by

1 Answer

Answer :

Xanthoproteic test
by

Related questions

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Will adrenaline give a positive xanthoproteic test?

Description : Will adrenaline give a positive xanthoproteic test?

Last Answer : yes

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Last Answer : Answer : C

What is the basis of xanthoproteic test?

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Last Answer : Answer : B

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Last Answer : Ans. Due to formation of colloidal sol of Sulphur. 

Which of the following compounds does not dissolve in concentrated H2SO4 on warming? (a) n-Hexane (b) Diethyl ether (c) 1-Butene (d) Aniline

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The reagent used to test the presence of starch in leaves is (1) Fehling’s solution (2) Iodine solution (3) Million’s reagent (4) Benedict’s solution

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What does biuret solution specifically react with to produce a color change?

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For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of A. H2SO4 B. HNO3 C. HCl D. None of these

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What happens when urea is treated with hydrazine? (a) Biuret is formed (b) Semicarbazide is formed(c) Carbon dioxide and nitrogen is formed(d) Acetamide is formed

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Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with acidic KMnO4 solution. (c) on refluxing with concentrated H2SO4 gives a mixture of ortho and para toluenesulfonic acid. (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.

Description : Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with ... (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.

Last Answer : can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene

45. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from (1) Zero to + 1 and zero to –3 (2) Zero to +1 and zero to –5 (3) Zero to –1 and zero to + 5 (4) Zero –1 and zero to + 3

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Last Answer : Zero to –1 and zero to + 5

Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2) H2SO4 (3) HCl (4) HF

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Last Answer : (2) H2SO4 Explanation: Sulfuric acid is used as a catalyst for refining and for producing alkylate, an essential component of highoctane fuel. The hydrocarbon molecules are reformed into more complex molecules with a higher octane rating value.

Glass is soluble in - (1) H2SO4 (2) HCIO4 (3) HNO3 (4) HF

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Last Answer : (4) HF Explanation: Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. Its ability to dissolving lass has been known since the 17th century. It is a solution of hydrogen fluoride in water and is represented by HF.

Aquaregia is a mixture of the following in the ratio 1 : 3 by volume– (1) cone. HNO3 and cone. HCL (2) conc. HNO3 and conc. H2SO4 (3) dil. HCl and dil. HNO3 (4) cone. HCl and cone. HNO3

Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume– (1) cone. HNO3 and cone. HCL (2) conc. HNO3 and conc. H2SO4 (3) dil. HCl and dil. HNO3 (4) cone. HCl and cone. HNO3

Last Answer : (3) dil. HCl and dil. HNO3 Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids which is formed by freshly mixing concentrated Nitric acid (HNO3) and Hydrochloric acid (HCl), optimally in a volume ratio of 1:3. It is used in dissolving gold.

Out of (a) HNO3 + H2O and (b) C6H6 + C6H5CH3 which will form max. boiling azeotrope ?

Description : Out of (a) HNO3 + H2O and (b) C6H6 + C6H5CH3 which will form max. boiling azeotrope ?

Last Answer : (a) HNO3 + H2O.

Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Description : Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Last Answer : 1-Nitronaphthalene

Nitration of nitrobenzene with HNO3/H2SO4 gives : (a) m-dinitrobenzene (b) o-dinitrobenzene (c) p-dinitrobenzene (d) m-nitrobenzenesulfonic acid

Description : Nitration of nitrobenzene with HNO3/H2SO4 gives : (a) m-dinitrobenzene (b) o-dinitrobenzene (c) p-dinitrobenzene (d) m-nitrobenzenesulfonic acid

Last Answer : m-dinitrobenzene

Which of the following compounds reacts most rapidly with HNO3/H2SO4? (a) toluene (b) anisole (c) nitrobenzene(d) benzonitrile

Description : Which of the following compounds reacts most rapidly with HNO3/H2SO4? (a) toluene (b) anisole (c) nitrobenzene (d) benzonitrile

Last Answer : anisole

Which of the following reagents will react with propene? (a) Hot alkaline KMnO4 (b) Sodium metal (c) Cold dilute HNO3 (d) LiAlH4

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Last Answer : Hot alkaline KMnO4

Diazotization is carried out by… a. HNO3 b. H2SO4 c. HNO2 d. NO

Description : Diazotization is carried out by… a. HNO3 b. H2SO4 c. HNO2 d. NO

Last Answer : c. HNO2

Which of the following molecules exhibit resonance w) OF3 x) HNO3 y) C2H4 z) PCl3

Description : Which of the following molecules exhibit resonance w) OF3 x) HNO3 y) C2H4 z) PCl3

Last Answer : ANSWER: X -- HNO3

Aquaregia is a mixture of the following in the ratio 1 : 3 by volume (1) conc. HNO3 and conc. HCl (2) conc. HNO3 and conc. H2 SO4 (3) dil. HCl and dil. HNO3 (4) conc. HCl and conc. HNO3

Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume (1) conc. HNO3 and conc. HCl (2) conc. HNO3 and conc. H2 SO4 (3) dil. HCl and dil. HNO3 (4) conc. HCl and conc. HNO3

Last Answer : dil. HCl and dil. HNO3

Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2)H2 SO4 (3) HCl (4) HF

Description : Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2)H2 SO4 (3) HCl (4) HF

Last Answer : H2 SO4