Description : The compound that does not undergo hydrolysis by `S_(N^(1))` mechanism is :
Last Answer : The compound that does not undergo hydrolysis by `S_(N^(1))` mechanism is : A. `H_(2)C=CHCH_(2)Cl` B. `C_(6) ... )Cl` D. `C_(6)H_(5)CH(C_(6)H_(5))Cl`
Description : `S_(N^(1))` mechanism for the hydrolysis of an alkyl halide involves the formation of intermediate:
Last Answer : `S_(N^(1))` mechanism for the hydrolysis of an alkyl halide involves the formation of intermediate: ... B. carbocation C. carbanion D. none of these
Description : Which one of the following halogen compounds is difficult to be hydrolysed by `S_(N^(1))` mechanism?
Last Answer : Which one of the following halogen compounds is difficult to be hydrolysed by `S_(N^(1)) ... B. Isopropyl chloride C. Benzyl chloride D. Chlorobenzene
Description : Which of the following undergoes nucleophilic substitution exclusively by `S_(N^(1))` mechanism?
Last Answer : Which of the following undergoes nucleophilic substitution exclusively by `S_(N^(1))` ... Isopropyl chloride C. Chlorobenzene D. Benzyl chloride
Description : Which of the following alkyl halides is hydrolysed by `S_(N^(1))` mechanism?
Last Answer : Which of the following alkyl halides is hydrolysed by `S_(N^(1))` mechanism? A. `CH_(3)Cl` B. `CH_(3)CH_(2)Cl` ... (2)CH_(2)Cl` D. `(CH_(3))_(3)"CCl"`
Description : Catalytic hydrogenation of 3-methyl-1-butene gives : (a) Isobutane (b) 2,2-Dimethylbutane (c) 2-Methylbutane (d) 2,3-Dimethylbutane
Last Answer : 2-Methylbutane
Description : The reaction of 1-butene with bromine, Br2, in aqueous solution gives primarily 1-bromo-2-butanol. Identify the nucleophilic species in the reaction. (a) Br2 (b) Br– (c) H2O (d) HOBr
Last Answer : H2O
Description : Which compound is not an isomer of the other three? (a) n-Pentane (b) 2,2-Dimethylpropane (c) 2-Methylbutane
Last Answer : 2,3-Dimethylbutane
Description : As `S_(N^(2))` reaction at an asymmetric carbon of a compound always gives:
Last Answer : As `S_(N^(2))` reaction at an asymmetric carbon of a compound always gives: A. an ... C. a mixture of diastereomers D. a single stereoisomer
Description : The ethyl derivative of acetoacetic ester on basic-hydrolysis gives (a) Acetic acid (b) Acetic acid and propionic acid (c) Propionic acid (d) Acetic acid and n-butyric acid
Last Answer : Acetic acid
Description : n-Propylmagnesium bromide on treatment with carbon dioxide and further hydrolysis gives : (a) Acetic acid (b) Propanoic acid (c) Butanoic acid (d) Formic acid
Last Answer : Butanoic acid
Description : Six months after beginning atorvastatin, the patient's total and LDL cholesterol concentrations remained above normal and he continued to have anginal attacks despite good adherence to his antianginal ... Increased endocytosis of HDL by the liver (e) Increased lipid hydrolysis by lipoprotein lipase
Last Answer : Ans: C
Description : The R/S designation for the following stereoisomers of 1,3-Dibromo-2-methylbutane is :
Last Answer : The R/S designation for the following stereoisomers of 1,3-Dibromo-2-methylbutane is : A. 2R, 3R B. 2R, 3S C. 2S, 3R D. 2S, 3S
Description : Out of pentane, 2-methylbutane and 2,2-dimethylpropane which has the highest boiling point and why?
Last Answer : Ans. Pentane having a continuous chain of five carbon atoms has the highest boiling point (309.1K) whereas 2,2 - dimethylpropane boils at 282.5K. With increase in number ... and therefore weak intermolecular forces between spherical molecules, which are overcome at relatively lower temperatures
Description : Which of the alkyl chlorides listed below undergoes dehydrohalogenation in the presence of a strong base to give 2-pentene as the only alkene product? (a) 1-chloropentane (b) 2-chloropentane (c) 3-chloropentane (d) 1-chloro-2-methylbutane
Last Answer : 3-chloropentane
Description : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? .
Last Answer : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? . A. B. C. D.
Description : what alkene can be made when using 2-Bromo-2-methylprane ?
Last Answer : 4
Description : How can tri substitution of Bromine be prevented in aniline ? OR How can we prepare mono bromo aniline ?
Last Answer : Because of high reactivity of aromatic amines substitution tends to occur at o- and ppositions. Monosubstituted aniline can be prepared by protecting — NH2 group by acetylation with acetic anhydride, then carrying out substitution followed by hydrolysis of substituted amide.
Description : What compound results from the 1,4-addition of one equivalent of HBr to 1,3-butadiene? (a) 1-bromo-1-butene (b) 2-bromo-2-butene (c) 4-bromo-1-butene (d) 1-bromo-2-butene
Last Answer : 1-bromo-2-butene
Description : 1,3-Butadiene reacts with bromine to mainly give (a) 3,4-Dibromo-1-butene (b) 4-Bromo-1-butene (c) 1,4-Dibromo-2-butene (d) 1-Bromo-2-butene
Last Answer : 1,4-Dibromo-2-butene
Description : The 1H NMR spectrum of 2-bromo-2-methylpropane will consist of? a. three quartets and a singlet b. two doublets and a singlet c. two singlets d. one singlet
Last Answer : d. one singlet
Description : How many hydrogen atoms are there in the organic compound 1,1,2,2-tetrabromoethane (read: tetra - bromo - ethane)?
Last Answer : ANSWER: 2
Description : Aqueous solution of `Na_(2)S_(2)O_(3)` on reaction with `CI_(2)`, gives
Last Answer : Aqueous solution of `Na_(2)S_(2)O_(3)` on reaction with `CI_(2)`, gives A. `Na_(2)S_(2)O_(6)` B. `NaHSO_(4)` C. `NaCl` D. `NaOH`
Last Answer : Aqueous solution of `Na_(2)S_(2)O_(3)` on reaction with `CI_(2)`, gives A. `Na_(2)S_(4)O_(6)` B. `NaHSO_(4)` C. NaCl D. NaOH
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 : Which of the following gives `H_(2)O_(2)` on hydrolysis ?
Last Answer : Which of the following gives `H_(2)O_(2)` on hydrolysis ? A. `H_(2)S_(2)O_(3)` B. `H_(2)SO_(5)` C. `H_(2)S_(2)O_(7)` D. `H_(2)S_(4)O_(6)`
Description : `XeF_2` on complete hydrolysis gives:
Last Answer : `XeF_2` on complete hydrolysis gives: A. Xe B. `XeO_2` C. (C) `XeO_2F_2 ` D. (D) `XeO_4`
Description : Hydrolysis of `XeF_4 and CaCN_2` gives respectively:
Last Answer : Hydrolysis of `XeF_4 and CaCN_2` gives respectively: A. (A) `XeO_3 and CaCO_3` B. (B) `XeO_2 and Ca(OH) ... and Ca(OH)_2 ` D. (D) `XeOF_2 and CaCO_3`
Description : Benzene diazonium chloride on hydrolysis gives
Last Answer : Benzene diazonium chloride on hydrolysis gives A. Benzene B. Benzyl alcohol C. Phenol D. Chlorobenzene
Description : `XeF_(6)` on hydrolysis gives
Last Answer : `XeF_(6)` on hydrolysis gives A. `XeOF_(4)` B. `XeO_(2)F_(2)` C. `XeO_(3)` D. `XeO_(4)`
Description : `SCl_(4)` on hydrolysis gives:
Last Answer : `SCl_(4)` on hydrolysis gives: A. `H_(2)SO_(3)` B. `H_(2)SO_(4)` C. `H_(2)S_(2)O_(7)` D. `H_(2)S_(2)O_(8)`
Description : Which one gives the most valid and recent explanation for stomatal movement? (a) Starch hydrolysis (b) Guard cell photosynthesis (c) Transpiration (d) Potassium influx and efflux
Last Answer : (d) Potassium influx and efflux
Description : Methyl benzoate on hydrolysis gives (a) Acetic acid (b) Benzoic acid (c) Picric acid (d) Phenylacetic acid
Last Answer : Benzoic acid
Description : Benzoyl chloride on basic-hydrolysis (NaOH/H2O) gives : (a) Benzoic acid (b) Methyl benzoate (c) Sodium benzoate (d) Ethyl benzoate
Last Answer : Sodium benzoate
Description : Hydrolysis of benzotrichloride gives (a) Benzophenone (b) Benzoic acid (c) Benzyl alcohol (d) Phenol
Description : Hydrolysis of benzal chloride gives (a) Phenol (b) Benzaldehyde (c) Benzyl alcohol (d) Benzoyl chloride
Last Answer : (d) Benzoyl chloride
Description : Ketones react with Grignard reagents to form an addition product which on hydrolysis gives a (a) Primary alcohol (b) Tertiary alcohol (c) Secondary alcohol (d) Ketal
Last Answer : Tertiary alcohol
Description : Which of the following compounds on hydrolysis gives propyne? (a) CaC2 (b) Mg2C3 (c) Al4C3 (d) Cu2Cl2
Last Answer : Al4C3
Description : Which of the following compounds on hydrolysis gives acetylene? (a) CaC2 (b) Mg2C3 (c) Al4C3 (d) Cu2Cl2
Last Answer : (a) CaC2
Description : If `alpha, beta` are roots of equation `x^(2)-4x-3=0` and `s_(n)=alpha^(n)+beta^(n), n in N` then the value of `(s_(7)-4s_(6))/s_(5)` is
Last Answer : If `alpha, beta` are roots of equation `x^(2)-4x-3=0` and `s_(n)=alpha^(n)+beta^(n), n in N` then the value ... 4s_(6))/s_(5)` is A. 4 B. 3 C. 5 D. 7
Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)
Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated ... 56 mL B. 112 mL C. 168 mL D. 224 mL
Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... . 0.8 g C. 4.2 g D. 0.98 g
Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... 37.2 mL C. 5.6 mL D. 22.4 mL
Description : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8)]^(2-))tounderset("Green")([(NH_(3))_(5)Co-O-O-Co(N
Last Answer : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8) ... III " "IV" & "III" "III),("brown "" green"):}`
Description : (A) In `S_(N^(2))` reactions, complete inversion of configuration takes place. (R) In `S_(N^(1))` reactions, retention but not the inversion takes pla
Last Answer : (A) In `S_(N^(2))` reactions, complete inversion of configuration takes place. (R) In `S_(N^(1))` ... . D. IF (A) is incorrect but (R) is correct.
Description : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition state intermediate.
Last Answer : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition ... . D. IF (A) is incorrect but (R) is correct.