Description : The correct sequence regarding base strength of aliphatic amines in aqueous solution is:
Last Answer : The correct sequence regarding base strength of aliphatic amines in aqueous solution is: A. `R_(3)N gt R_(2) NH gt ... gt R_(2)NH gt R_(3)N gt NH_(3)`
Description : Which of the following is the strongest base in aqueous solution? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : (1) Diethylamine Explanation: Amines are organic derivatives of ammonia, in which one, two, or all three of the hydrogens of ammonia are replaced by organic groups. All aliphatic primary amines are stronger bases than ammonia.
Description : Which of the following is the strongest base in aqueous solution ? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine
Last Answer : Diethylamine
Description : Which of the following is the strongest nucleophile in an aqueous solution? (a) HO– (b) Cl– (c) Br– (d) I
Last Answer : I–
Description : Among the following the strongest base is
Last Answer : Among the following the strongest base is A. `C_(6)H_(5)NH_(2)` B. `p-NO_(2)-C_(6)H_(4)NH_(2)` C. `m-NO_ ... )H_(4)NH_(2)` D. `C_(6)H_(5)CH_(2)NH_(2)`
Description : When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form
Last Answer : primary amines form
Description : Alkyl halides react with ammonia in the presence of base to form : (a) primary amines (b) nitrated alkyl halides (c) amides (d) quaternary ammonium salts
Last Answer : primary amines
Description : The volume of `0.1 N` dibasic acid sufficient to neutralize 1g of a base that furnishes `0.04` mole of `OH^-` in aqueous solution is :
Last Answer : The volume of `0.1 N` dibasic acid sufficient to neutralize 1g of a base that furnishes `0.04` mole of `OH^-` ... 400 mL B. 600 mL C. 200 mL D. 80 mL
Description : .Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, ... (i) and (iii) (b) (ii) and (iii (c) (i) and (iv) (d) (ii) and (iv)
Last Answer : (d) (ii) and (iv)
Description : Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar concentration ?
Last Answer : Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar ... N (CH_(3))_(3)Br^(-)`
Description : Among the following, which surfactant will form micelles in aqueous solution at the lowest molar concentration at ambient conditions?
Last Answer : Among the following, which surfactant will form micelles in aqueous solution at the lowest molar concentration at ambient ... (+)(CH_(3))_(3)Br^(-)`
Description : Among the following which one is most basic in aqueous solution ?
Last Answer : Among the following which one is most basic in aqueous solution ? A. `NH_(3)` B. `CH_(3)NH_(2)` C. `(CH_(3))_(2)NH` D. `(CH_(3))_(3)N`
Description : Which among the following is false about acids? (1) They give H+ ions in aqueous solution (2) Most acids contain hydrogen (3) They turn blue litmus red (4) They are bad conductor of electricity in aqueous solution
Last Answer : (4) They are bad conductor of electricity in aqueous solution Explanation: Acids are good conductors of electric current in aqueous solution. When acids come in contact with water, they liberate OH ions, resulting in conduction of electricity.
Description : Which of the following is the strongest base?
Last Answer : Which of the following is the strongest base? A. B. C. D.
Description : Strongest base is :
Last Answer : Strongest base is : A. B. C. D.
Description : Which of these is the strongest base?
Last Answer : Which of these is the strongest base? A. B. C. D.
Description : For the following compounds, which is the strongest base and which is strongest acid?
Last Answer : For the following compounds, which is the strongest base and which is strongest acid? A. II = ... D. II = Strongest base, III = Strongest acid
Description : Which of the following is the strongest Bronsted base?
Last Answer : Which of the following is the strongest Bronsted base? A. B. C. D.
Description : Strongest base is:
Last Answer : Strongest base is: A. B. C. D.
Description : Which of the following is strongest Lewis Base
Last Answer : Which of the following is strongest Lewis Base A. `H_(2)O` B. `CH_(3)OH` C. `CH_(3)OCH_(3)` D. `C_(6)H_(5)OH`
Description : Which of the following is the strongest base? (a) HOMgBr (b) H2O (c) CH3OH (d) CH3MgBr
Last Answer : CH3MgBr
Description : Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S
Last Answer : ANSWER: W -- NH3
Description : When a mobile telephone physically moves from one to another cell, the base station transfers ownership to the cell getting strongest signal. This process is known as................. (A) handoff (B) mobile switching (C) mobile routing (D) cell switching
Last Answer : (A) handoff
Description : Acetyl salicylic acid is soluble in (a) An aqueous base (b) Water (c) An aqueous acid
Last Answer : Ans: A
Description : What is the highest and strongest organization among all the organizations that people have organized for the development of civilization ?
Last Answer : The state is the highest and strongest association among all the organizations formed by the people for the development of civilization.
Description : Which among the following factors is the most important in making fluorine the strongest oxidizing halogen ?
Last Answer : Which among the following factors is the most important in making fluorine the strongest oxidizing ... affinity D. (4) Bond dissociation energy
Description : Among the following , metal carbonyls, the C-O bond is strongest :
Last Answer : Among the following , metal carbonyls, the C-O bond is strongest : A. `[Mn(CO)_(6)]^(+)` B. `[Cr(CO)_(6)]` C. `[V(CO)_(6)]^(-)` D. `[Ti(CO)_(6)]^(2-)`
Description : Among the following the strongest nucleophilic is
Last Answer : Among the following the strongest nucleophilic is A. `C_(2)H_(5)SH` B. `CH_(3)COO^(-)` C. `CH_(3)NH_(2)` D. `N"CC"H_(2)^(-)`
Description : Among the following polymers, the strongest molecular forces are present in:
Last Answer : Among the following polymers, the strongest molecular forces are present in: A. elastomers B. fibres C. thermoplastics D. thermosetting polymers
Description : The strongest acid among the following
Last Answer : The strongest acid among the following A. `H_(2)SO_(4)` B. `H_(2)SeO_(4)` C. `H_(2)TeO_(4)` D. `H_(2)PoO_(4)`
Description : The strongest oxidizing agent among the following is: (1) Chlorine (2) Iodine (3) Fluorine (4) Oxygen
Last Answer : (3) Fluorine Explanation: An oxidizing agent is a chemical species that removes an electron from another species. Fluorine, having the largest positive value of electrode potential, is the strongest ... all halogens have a tendency to take up electrons and thus act as strong oxidizing agents.
Last Answer : Fluorine
Description : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :-
Last Answer : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :- A. 6 B. 7 C. 8 D. 9
Description : n-propylamine containing no secondary and tertiary amines as impurities is prepared by
Last Answer : n-propylamine containing no secondary and tertiary amines as impurities is prepared by A. Hoffmann ... n-propylchloride with ammonia D. none of these
Description : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is
Last Answer : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in ... reaction D. Reaction with `NH_(3)`
Description : Of the following reactions, how many reaction, are used for the preparation of amines? (a) `R-C-=N overset(LiAIh_(4))rarr` (b) `R-overset(O)overset(||
Last Answer : Of the following reactions, how many reaction, are used for the preparation of amines? (a) `R-C-=N overset( ... R-CH_(2)-NO_(2) overset(H_(2),Ni)rarr`
Description : Of the following amines how many can give carbyl amine reaction?
Last Answer : Of the following amines how many can give carbyl amine reaction?
Description : Which of the following amines cannot be prepared by path-I?
Last Answer : Which of the following amines cannot be prepared by path-I? A. B. C. D.
Description : Which of the following amines reacts most rapidly with
Last Answer : Which of the following amines reacts most rapidly with A. B. C. D.
Description : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following
Last Answer : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann ... to accomplish this? A. B. C. D.
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 : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`?
Last Answer : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`? A. `CH_(3)NH_(2)` B. C. D.
Description : Which of the following amines will react with cyclohexanone to give enamine?
Last Answer : Which of the following amines will react with cyclohexanone to give enamine? A. `CH_(3)NH_(2)` B. C. D.
Description : Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons
Last Answer : (1) Triesters Explanation: Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters.
Description : Aromatic primary amines are not prepared by gabrial phthalimide synthesis. Why?
Last Answer : Ans:- Because aryl halides donot undergo nucleophilic substitution reaction.
Description : Why tert. Amines donot undergo acylation reaction ?
Last Answer : Ans.-- Tert. Amines donot undergo acylation reaction because they donot have Nattached to H- atom.
Description : Why are amines always less acidic than comparable alcohols?
Last Answer : Ans.--- Amines are less acidic than alcohols because of oxygen higher electronegative & smaller size. Therefore O-H breakes easily than N-H bond.
Description : Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.
Last Answer : Ans— a. In pr. Amines, alkyl group increases electron density on the N-atom making it more basic than ammo b. In sec. amine, there are two alkyl groups increase electron density on N-atom more than N-atom in pr. amines in which there is one alkyl group.
Description : Can tertiary amines undergo acetylation reactions ? Explain.
Last Answer : For an amine to undergo acetylation, it should have a replaceable hydrogen atom. Tertiary amines cannot undergo acetylation reactions because these do not have replaceable hydrogen atom.