Description : Hofmann rearrangement In the Hofmann rearrangement an unsubstituted amide is treated with sodium hydroxide and bromide to give a primary amine that ha
Last Answer : Hofmann rearrangement In the Hofmann rearrangement an unsubstituted amide is treated with sodium hydroxide and bromide to ... . `II gt I gt IV gt III`
Description : The conversion of an amide by reaction `NaOH` and `Br_(2)` to primary amine that has one carbon than the strating amide is known as Hofmann-Bromoamide
Last Answer : The conversion of an amide by reaction `NaOH` and `Br_(2)` to primary amine that has one carbon than the ... ` Mechanism: A. B. C. D. all of these
Last Answer : The conversion of an amide by reaction `NaOH` and `Br_(2)` to primary amine that has one carbon than the strating ... : Find X and Y: A. B. C. D.
Last Answer : The conversion of an amide by reaction `NaOH` and `Br_(2)` to primary amine that has one carbon than the strating ... reaction: A. 1 B. 2 C. 3 D. 4
Description : In the Hofmann-Bromamide rearrangement intermediate compounds are:
Last Answer : In the Hofmann-Bromamide rearrangement intermediate compounds are: A. `R -CONHBr` B. `[R-overset(O)overset(||)(C)- ... ` C. `R -N=C=O` D. all of these
Description : ----rearrangement involves alpha diketone. a. Wolf b. Schmidt c. Hofmann d. Curtius
Last Answer : a. Wolf
Description : Alkyl cyanide on reduction gives….. a. primary amine b. secondary amine c. amide d. carboxylic acid
Last Answer : a. primary amine
Description : Reduction of an imine will give an (a) Acid (b) Amide (c) Amine (d) Alcohol
Last Answer : Amine
Description : In the hofmann-bromamide degradation reaction, the number of moles of NaOH and `Br_(2)` used per mole of amine produced are
Last Answer : In the hofmann-bromamide degradation reaction, the number of moles of NaOH and `Br_(2)` used per mole of ... moles of NaOH and one mole of `Br_(2)`
Description : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:
Last Answer : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions: A. B. C. D.
Description : Why is amide more acidic than an amine ?
Last Answer : Ans.—In amide there is C=O group attached NH2 , electron withdrawing & increases acidic nature of amide whereas in amines there is alkyl group which is electron releasing and makes it more basic & hence less acidic.
Description : Consider a small aliphatic 1° amine, 1° alcohol, ester, carboxylic acid, and amide, all of similar molecular weight. Which one is most likely to have the highest boiling point? (a) The amide (b) The alcohol (c) The ester (d) The carboxylic acid
Last Answer : The amide
Description : Which of the following chemicals is used in photography? (1) Aluminium hydroxide (2) Silver bromide (3) Potassium nitrate (4) Sodium chloride
Last Answer : (2) Silver bromide Explanation: Silver bromide (AOBr), a soil , pale-yellow, water insoluble salt well known (along with other silver hali(les) for its unusual sensitivity to light:. This ... making the Shroud of Turin. The salt can be found naturally as the mineral bromargyrite (bromyrite).
Description : Which of the following chemicals is used in photography ? (1) Aluminium hydroxide (2) Silver bromide (3) Potassium nitrate (4) Sodium chloride
Last Answer : Silver bromide
Description : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction.
Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is ... is formed which can be given as: A. B. C. D.
Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt ... reaction. The final product is A. B. C. D.
Last Answer : When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and ... gt R gt S` D. `S gt R gt Q gt P`
Description : Which type of amine produces N2 when treated with HONO? (a) Primary (b) Secondary (c) Tertiary (d) Quaternary
Last Answer : Primary
Description : Carbylamine test involves heating a mixture of (a) alcoholic KOH, methyl iodide, and sodium metal (b) alcoholic KOH, methyl iodide, and primary amine (c) alcoholic KOH, chloroform, and primary amine (d) alcoholic KOH, methyl alcohol, and primary amine
Last Answer : alcoholic KOH, chloroform, and primary amine
Description : A nitrile can be made by dehydrating an amide. However, for this reaction to occur, the amide must be : (a) primary (b) secondary (c) tertiary (d) N-methylated
Last Answer : primary
Description : Which of the following is the correct ranking in decreasing order of relative Boiling Point of carbonyl containing compounds? (a) primary amide > carboxylic acid >> ester ~ acyl chloride ~ aldehyde ~ ketone ... chloride ~ amide (d) carboxylic acid > amide >> ester ~ acyl chloride ~ aldehyde ~ ketone
Last Answer : primary amide > carboxylic acid >> ester ~ acyl chloride ~ aldehyde ~ ketone
Description : An aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed `C_(6)H_(5)NC`. The compound (Y) wa
Last Answer : An aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed `C_ ... 3)OH` D. `C_(6)H_(5)NH_(2)`
Description : Give 3 methods to distinguish primary amine from secondary and tertiary.
Last Answer : Give 3 methods to distinguish primary amine from secondary and tertiary.
Description : --------rearrangement give the product of Cine substitution. a. Wittig b. Von Richter c. Rupe d. Lossen
Last Answer : b. Von Richter
Description : 2-Methyl-2-butene reacts with HBr in the presence of peroxide to give (a) A primary alkyl bromide (b) A secondary alkyl bromide (c) A tertiary alkyl bromide (d) A vicinal dibromide
Last Answer : A secondary alkyl bromide
Description : 2-Methylpropene reacts with HBr in the presence of peroxide to give (a) A primary alkyl bromide (b) A secondary alkyl bromide (c) A tertiary alkyl bromide (d) A vicinal dibromide
Last Answer : A primary alkyl bromide
Description : under Hofmann conditions will give :
Last Answer : under Hofmann conditions will give : A. B. C. D.
Description : Which of the following will give Hofmann-Bromoamide reaction?
Last Answer : Which of the following will give Hofmann-Bromoamide reaction? A. B. C. D.
Description : A patient treated with capsule oxytetracycline 500 mg 6 hourly complained of epigastric pain. Which of the following measures will you recommend to counteract the side effect: A. Take the capsules ... capsules D. None of the above measures is suitable. Change the antibiotic if pain is distressing
Last Answer : D. None of the above measures is suitable. Change the antibiotic if pain is distressing
Description : The major product obtained when tert- butyl bromide is heated with sodium ethoxide is
Last Answer : The major product obtained when tert- butyl bromide is heated with sodium ethoxide is A. 2- ... Ehene C. tert- Buty1methy1ether D. Diethyl ether
Description : The formula of product formed, when sodium thiosulphate solution is added to silver bromide is
Last Answer : The formula of product formed, when sodium thiosulphate solution is added to silver bromide is A. `Na_(3)[Ag(S_(2)O_ ... `Ag_(3)[Na(S_(2)O_(3))_(2)]`
Description : What is the percent composition of sodium bromide and show work?
Last Answer : Sodium: 22,55 %Bromine: 77,45 %
Description : Hypo, used in photography, is chemically (a) silver bromide (b) sodium thiosulphate (c) sodium phosphate (d) silver nitrate
Last Answer : Ans:(b)
Description : Consider the following statements: 1. Bordeaux mixture consists of sodium bromide and lime 2. Toothpastes contain calcium carbonate 3. Zinc amalgam is used in dental fillings 4. Liquid sodium is used as a coolant in nuclear reactors The ... 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(c)
Description : The chemical used in developing photographic films is – (1) silver bromide (2) hypo (3) sodium sulphate (4) hydroquinone
Last Answer : (1) silver bromide Explanation: Tritium is a radioactive isotope of hydrogen. It is the lightest radioactive element.
Description : Which halide is used in making sensitive emulsion on photographic film? (1) Sodium chloride (2) Silver bromide (3) Silver iodide (4) Silver chloride
Last Answer : (2) Silver bromide Explanation: Silver bromide, a soft, paleyellow, water insoluble salt well known for its unusual sensitivity to light. This property has allowed silver halides to become the basis of modern photographic materials.
Description : Ethyl bromide reacts with sodium methoxide to form (a) Diethyl ether (b) Ethyl methyl ether (c) Dimethyl ether (d) n-Propyl alcohol
Last Answer : Ethyl methyl ether
Description : A mixture of chlorine & sodium bromide acts as a/an (A) Insecticides (B) Analgesic drug (C) Fire retardant (D) Hydrogenation catalyst
Last Answer : (C) Fire retardant
Description : The following antiasthma drug is not a bronchodilator: A. Ipratropium bromide B. Theophylline C. Formoterol D. Sodium cromoglycate
Last Answer : D. Sodium cromoglycate
Description : The law of multiple proportions is illustrated by the two compounds [NCERT 1972] (A) Sodium chloride and sodium bromide (B) Ordinary water and heavy water (C) Caustic soda and caustic potash (D) Sulphur dioxide and sulphur trioxide
Last Answer : (D) Sulphur dioxide and sulphur trioxide
Description : The mineral halite is: w) potassium chloride x) sodium chloride y) calcium chloride z) calcium bromide
Last Answer : ANSWER: X -- SODIUM CHLORIDE
Description : Which of the following would be least soluble in water? w) Carbon Tetrachloride x) Sodium Oxide y) Magnesium Bromide z) Potassium Phosphate
Last Answer : ANSWER: W -- CARBON TETRACHLORIDE
Description : The pH of water will be decreased to below pH 7 by the hydrolysis of which of the following? w) sodium carbonate x) sodium chloride y) ammonium chloride z) potassium bromide
Last Answer : ANSWER: C -- AMMONIUM CHLORIDE
Description : The chemical used in developing photographic films is (1) silver bromide (2) hypo (3) sodium sulphate (4) hydroquinone
Last Answer : silver bromide
Description : Which halide is used in making sensitive emulsion on photograhic film? (1) Sodium chloride (2) Silver bromide (3) Silver iodide (4) Silver chloride
Description : The substance that gives a primary amine on hydrolysis is
Last Answer : The substance that gives a primary amine on hydrolysis is A. nitroparaffin B. alkyl cyanide C. oxime D. alkyl isocyanide
Description : The presence of primary amine can be confirmed by its reaction with:
Last Answer : The presence of primary amine can be confirmed by its reaction with: A. `HNO_(2)` B. `CHCI_(3) +NaOH` C. `CS_(2)` and `HgCI_(2)` D. `H_(2)SO_(4)`
Description : Answer: b, c, d Eosinophils constitute 1% to 3% of the leukocyte population of the bloodstream. They also reside in tissues and they exhibit phagocytic capabilities. They are less ... the cycle of events that result in recruitment and activation of inflammatory cells at sites of inflammation
Last Answer : Cellular injury from oxidants may be manifest by which of the following? a. Cell membrane lipid peroxidation b. DNA strand breaks c. Cytoskeletal disassembly d. ATP depletion
Description : Preparation of a diazonium salt from a primary aromatic amine is known as : (a) Coupling reaction (b) Sandmeyer reaction (c) Diazotization (d) Corey-House synthesis
Last Answer : Diazotization
Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl
Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid