Description : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electroph
Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. ... (I) is: A. B. C. D.
Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This ... (2)` D. `.^(*)C Cl_(3)`
Last Answer : Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. ... ` D. aq. `NaOH + C Cl_(4)`
Description : The product of Reimer-Tiemann reaction is a
Last Answer : The product of Reimer-Tiemann reaction is a A. phenolic aldehyde B. hydroxyamine C. nitroaldehyde D. nitroalcohol
Description : In the reaction of phenol with `CHCl_(3)` and aqueous `NaOH` at `70^(@)`, the electrophile attacking the ring is:
Last Answer : In the reaction of phenol with `CHCl_(3)` and aqueous `NaOH` at `70^(@)`, the electrophile attacking the ring is: ... ` C. `:"CCl"_(2)` D. `COCl_(2)`
Description : Phenol is more reactive than benzene towards electrophilic substitution reaction. In case of Phenol, the intermediate carbocation is more resonance st
Last Answer : Phenol is more reactive than benzene towards electrophilic substitution reaction. In case of Phenol, the ... D. A is incorrect but R is correct
Description : When phenol reacts with chloroform and an alkali, the compound formed is salicylaldehyde. If pyrene is used in place of chloroform, the product obtain
Last Answer : When phenol reacts with chloroform and an alkali, the compound formed is salicylaldehyde. If ... . Salicyladehyde C. Phenolphthalein D. Cyclo hexanol
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.
Description : In sweetening process, solutizer agent used with caustic alkali is (A) Potassium isobutyrate (B) Sodium plumbite (C) Methanol (D) Phenol
Last Answer : (A) Potassium isobutyrate
Description : What happens when phenol is warmed with CCl4 in aqueous NaOH?
Last Answer : Feel Free to Answer
Description : Which of the following alkali metal ions has the lowest ionic mobility in aqueous solutions?
Last Answer : Which of the following alkali metal ions has the lowest ionic mobility in aqueous solutions? A. `Li^(+)` B. `Na^(+)` C. `Rb^(+)` D. `Cs^(+)`
Description : In the TCA cycle, at which of the following enzyme-catalyzed steps, incorporation of elements of water into an intermediate of the cycle takes place : (A) Citrate synthase (B) Aconitase (C) Maleate dehydrogenase (D) Succinyl Co-A synthase
Last Answer : (C) Maleate dehydrogenase
Description : Beta adrenergic blockers lower intraocular tension by: A. Down regulating adenylyl cyclase in ciliary body through reduced activation of β2 adrenoceptors B. Constricting ciliary blood vessels ... action on trabecular meshwork D. Reducing aqueous formation unrelated to beta adrenoceptor mediation
Last Answer : A. Down regulating adenylyl cyclase in ciliary body through reduced activation of β2 adrenoceptors
Description : Polymerization does not occur through intermediate formation of:
Last Answer : Polymerization does not occur through intermediate formation of: A. carbocations B. carbonions C. free radicals D. carbenes
Description : Which one of the following impurity is not desirable in the soil used for brick formation a) Alkali b) Kankar c) Iron oxide d) Alkali & Kankar*
Last Answer : d) Alkali & Kankar*
Description : (a) Show on a diagram the transfer of electrons between the atoms in the formation of MgO. Write symbols of cation and anion present in MgO. (b) Name the solvent in which ionic compounds are generally soluble. (c) Why are aqueous solutions of ionic compounds able to conduct electricity? -Chemistry
Last Answer : (b) Ionic compounds are soluble in water. (c) It is because aqueous solutions consist of ions which can move freely in them and carry current.
Description : True statements about the aqueous humour: a. has a higher lactic acid concentration than in the plasma b. the glucose levels is lower than that of the plasma levels c. the ascorbic acid ... same concentration of protein as in the plasma e. the rate of formation is about 2.5ul/minute
Last Answer : has a higher lactic acid concentration than in the plasma
Description : An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals
Last Answer : Zwitterion
Description : How can arsenic be removed from aqueous waste streams? Often times, ferric chloride is added to such a stream. The ferric chloride aids in the formation
Last Answer : Often times, ferric chloride is added to such a stream. The ferric chloride aids in the formation of floc to agglomerate fine arsenic particles that can then be removed by mechanical means.
Description : Pilocarpine reduces intraocular tension in open angle glaucoma by: A. Contracting sphincter pupillae B. Increasing tone of ciliary muscle C. Reducing aqueous formation D. Enhancing uveo-scleral outflow
Last Answer : B. Increasing tone of ciliary muscle
Description : An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction: (A) Is maximum at the inlet of the reactor (B) Goes through a maximum ... through a minimum along the length of the reactor (D) Is maximum at the exit of the reactor
Last Answer : (A) Is maximum at the inlet of the reactor
Description : The Set of actions for a problem in a state space is formulated by a ___________ a) Intermediate states b) Initial state c) Successor function, which takes current action and returns next immediate state d) None of the mentioned
Last Answer : c) Successor function, which takes current action and returns next immediate state
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 : A substance that is not an intermediate in the formation of D-glucuronic acid from glucose is (A) Glucoss-1-p (B) 6-Phosphogluconate (C) Glucose-6-p (D) UDP-Glucose
Last Answer : B
Description : Fibrinolytic therapy is based on activation of plasminogen, the inactive proteolytic enzyme of plasma that binds to fibrin during the formation of thrombosis. Activation of plasminogen to plasmin results ... TPA all exceed 30 minutes d. Streptokinase is significantly cheaper than urokinase or TPA
Last Answer : Answer: a, b, d Streptokinase is a bacterial protein produced by group C b-hemolytic streptococci. It is therefore antigenic in humans and can be associated with allergic reaction in ... one agent over the other. Streptokinase however, is markedly less expensive than either urokinase or TPA
Description : Imputed gross rent of owner-occupied buildings is a part of - (1) capital formation (2) final consumption (3) intermediate consumption (4) consumer durable
Last Answer : (2) final consumption Explanation: The figure of final private consumption expenditure includes the imputed gross rent of owner-occupied dwellings, consumption of own-account production and payment by ... of production and hence an income and is also a part of final consumption expenditure.
Description : Which of the following is not a correct statement about the electrophilic substitution mechanism of benzene? (a) Benzene functions as a nucleophile. (b) Formation of a carbocation intermediate is the ... hybridized carbon in the ring. (d) The addition product is a frequently observed minor product.
Last Answer : The addition product is a frequently observed minor product.
Description : Imputed gross rent of owneroccupied buildings is a part of (1) capital formation (2) final consumption (3) intermediate consumption (4) consumer durable
Last Answer : final consumption
Description : In which antibody formation takes place? -Do You Know?
Last Answer : answer:
Description : Formation of activation calyx in the egg takes place
Last Answer : Formation of activation calyx in the egg takes place A. Before fertilization B. After fertilization C. ... of cleavage D. At the time of amphimixis.
Description : Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous tubules lined with male germ cells and sertoli ce
Last Answer : Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous ... . If both Assertion & Reason are False.
Description : Spindle formation takes place during
Last Answer : Ans. Metaphase 1
Description : Pick out the wrong statement. Raoult's law does not apply, when the (A) Size of component molecules are not equal (B) Attractive forces between like and unlike molecules ... D) Chemical combination or molecular association between unlike molecules takes place in the formation of solution
Last Answer : (C) Component molecules are non-polar
Description : Chlorophyll formation takes place within a light wavelength of _________: a. 150-200 b. 200-300 c. 300-675 d. 700-900
Last Answer : 300-675
Description : The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C. (A) 100 to 150 (B) 350 to 450 (C) 550 to 650 (D) 700 to 850
Last Answer : (B) 350 to 450
Description : In ferns, meiosis takes place at the time of (a) spore formation (b) spore germination (c) gamete formation (d) antheridia and archegonia formation.
Last Answer : (a) spore formation
Description : which antibody formation takes place?
Last Answer : Blood Plasma
Description : `(CH_(3))_(3)C - OH overset(H_(2)SO_(4)) rarr (CH_(3))_(2) C = CH_(2)`, This reaction takes place through
Last Answer : `(CH_(3))_(3)C - OH overset(H_(2)SO_(4)) rarr (CH_(3))_(2) C = CH_(2)`, This reaction ... )2` mechanism C. `E_(1)` mechanism D. `E_(2)` mechanism
Description : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained in the above reaction is
Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product ... Bromophenol C. 4-Bromophenol D. 2,4,6-Tribromophenol
Description : (D) on reaction with phenol under alkaline conditions gives :
Last Answer : (D) on reaction with phenol under alkaline conditions gives : A. diazobenzene B. hydrazobenzene C. benzidine D. para hydroxy azobenzene
Description : The bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is an exmaple of:
Last Answer : The bakelite is made from phenol and formaldehyde. The initial reaction between the two compounds is ... C. free radical reaction D. aldol reaction
Last Answer : Phenol is heated with a solution of mixture of `KBr` and `KBrO_(3)`. The major product obtained ... C. 4-Bromophenol D. 2, 4,6-Tribromophenol
Description : Benzene diazonium chloride on reaction with phenol in a basic medium gives:
Last Answer : Benzene diazonium chloride on reaction with phenol in a basic medium gives: A. benzene B. chlorobenzene C. diphenyl ether D. p-hydroxy azobenzene
Description : Phenol on heating with NaOH followed by reaction with alky1 halide gives
Last Answer : Phenol on heating with NaOH followed by reaction with alky1 halide gives A. Acetone B. Ether C. Ethonal D. Acetic acid
Description : In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of (A) Cross linked polystyrene (B) Phenol formaldehyde resins (C) Polyesters (D) Polyamides
Last Answer : (A) Cross linked polystyrene
Description : A hydrazone will result from the reaction of hydrazine with (a) a phenol (b) an aldehyde (c) an alcohol (d) an acid
Last Answer : an aldehyde
Description : __________ is produced using Polycondensation reaction. (A) Polythene (B) Phenol formaldehyde (C) Poly vinyl chloride (D) None of these
Last Answer : (B) Phenol formaldehyde
Last Answer : Alkali loses its alkalinity in mitigation reaction