Description : Consider a 1°, 2° and 3° amine, all of equivalent molecular weight. Which amine is most likely to have the lowest boiling point? (a) 1° amine (b) 2° amine (c) 3° amine (d) Not enough information to determine
Last Answer : 3° amine
Description : A sample of pure amine molecules is found to possess no intermolecular Hbonding. This sample is most likely : (a) 1° amine (b) 2° amine (c) 3° amine (d) all of these
Description : Which of the following correctly reflects relative stabilities of carbocations? (a) 3° allylic > 2° > 1° benzylic (b) methyl > 2° benzylic > 3° (c) 3° benzylic > vinyl > 1° (d) 2° allylic > 2° > vinyl
Last Answer : (d) 2° allylic > 2° > viny
Description : If the radius of a main curve is 300 m and length of the transition curve is 100 m, the angle with tangent to locate the junction point, is (A) 1° 11' (B) 2° 11' (C) 3° 11' (D) 4° 11'
Last Answer : Answer: Option C
Description : The magnetic heading reference unit has a precision rate of: a. 1°/min b. 2°/min c. 5°/min d. 3°/min
Last Answer : b. 2°/min
Description : Esters and amides are most easily made by nucleophilic acyl substitution reactions on : (a) acid anhydrides (b) carboxylates (c) carboxylic acids (d) acid chlorides
Last Answer : acid chlorides
Description : Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react ... give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)
Last Answer : They react with chloroform and NaOH to form isocyanides.
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 : Which of the following acid-derivatives are most stable? (a) Acid chlorides (b) Esters (c) Amides (d) Anhydrides
Last Answer : Amides
Description : For clear distinct vision, images of obstructions should fall on the retina with a cone of (A) 2° (B) 3° (C) 4° (D) 5°
Last Answer : Answer: Option D
Description : Amides undergo hydrolysis under acidic conditions to give (a) Carboxylic acid and amine (b) Carboxylic acid and ammonium ion (c) Carboxylate ion and ammonium ion (d) Carboxylate ion and amine
Last Answer : Carboxylic acid and ammonium ion
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 : 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 : Which of the following statements concerning SN2 reactions of alkyl halides is not correct? (a) The rate of reaction depends on the concentration of the nucleophile. (b) The rate of reaction depends on the ... carbon of the C-Br bond. (d) All alkyl iodides react more rapidly than all alkyl chlorides
Last Answer : All alkyl iodides react more rapidly than all alkyl chlorides
Description : Ethanol amine is produced using ammonia and (A) Ethyl benzene (B) Ethylene oxide (C) Ethanol (D) Ethane
Last Answer : (B) Ethylene oxide
Description : Which of the following reactions is suitable for the preparation of α-amino acids? (a) Schmidt reaction (b) Hofmann's degradation of amides (c) Strecker's synthesis (b) Reduction of nitro compounds
Last Answer : Strecker's synthesis
Description : Which of the following reagents can be used to oxidize 1° alcohols to aldehydes? (a) KMnO4 (b) MnO2 (c) K2Cr2O7 (d) PCC
Last Answer : PCC
Description : Which of the following reagents does not react with aniline? (a) Acetyl chloride (b) Acetic anhydride (c) Ammonia (d) Nitrous acid
Last Answer : Ammonia
Description : Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about (A) 1 to 2° (B) 2 to 5° (C) 5 to 10° (D) 10 to 15°
Last Answer : (B) 2 to 5°
Description : The cutter bar is set at about to the direction of motion in order to overcome the back-pushing action of the crops. a. 90° with inward lead of 2° c. 92° with inward lead of 2° d. None of above
Last Answer : Ans- b. 88° with inward lead of 2°
Description : Write the two most important amides that are found in plants
Last Answer : Write the two most important amides that are found in plants
Description : Local anesthetics: A. Inhibit transmission of nerve impulses by increasing sodium membrane permeability and the displacement of ionized calcium. B. Are classified as amides or esters. C. Produce peripheral vasodilation. D. Are weak acids.
Last Answer : Answer: BC DISCUSSION: Local anesthetics act within the nerve membrane, where they inhibit transmission of nerve impulses by reducing sodium membrane permeability and the displacement of ionized ... based on this bond. All local anesthetics except cocaine produce vasodilatation and are weak bases
Description : Amino acid synthesis inhibitors a). Sulfonyl ureas b). Amides c). Triazines d). all
Last Answer : a). Sulfonyl ureas
Description : An increase of 1° – 2°C in ocean temperatures for a long time can lead to …………………. of corals.
Last Answer : Choose the correct option by identifying the correct correlation in the sentence: An increase of 1° - ... ) bleaching (c) death (d) congregation
Description : If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on (A) Staff normal (B) Staff vertical (C) Staff normal as well as vertical (D) None of these
Last Answer : (A) Staff normal
Description : If degree of a road curve is defined by assuming the standard length of an arc as 30 metres, the radius of 1° curve is equal (A) 1719 m (B) 1146 m (C) 1046 m (D) 1619 m
Last Answer : Answer: Option A
Description : At a range of 200nm from a VOR, if there is an error of 1°, how far off the centreline is the aircraft? a. 3.5nm b. 1.75nm c. 7nm d. 1nm
Last Answer : a. 3.5nm
Description : The chlorides of both beryllium and aluminium are Lewis acid Why ?
Last Answer : Ans Incomplete octate.
Description : State as to why: (a) A solution of Na2CO3 is alkaline? (b)alkali metals are prepared by electrolysis of their fused chlorides ? (c)sodium is found to be more useful than potassium ?
Last Answer : Ans. (a) It undergoes hydrolysis to produce a strong base NaOH . (b) When the aq. Solution of any alkali metal is subjected to electrolysis ,H2 instead of the alkali metal is produced at the ... of sugars and amino acids into the cells. Thus, sodium is found to be more useful than potassium.
Description : Why are transition metal fluorides are ionic in nature where as chlorides and bromides are covalent in nature .
Last Answer : Ans - It is because of fluorine is most electronegative where as Cl and Br are less electro negative . Greater the difference in electro negativity more will be ionic character .
Description : Esters can be formed by nucleophilic substitution reactions of : (a) carboxylic acids and alcohols ; acid-catalyzed (b) acid chlorides and alcohols (c) both of the above (d) neither of the above
Last Answer : both of the above
Description : Acid chlorides undergo reduction to the corresponding aldehydes on treatment with hydrogen in the presence of Pd/BaSO4. This reaction is called : (a) Clemmensen reduction (b) Rosenmund reduction (c) Wolf-Kishner reduction (d) None of these
Last Answer : Rosenmund reduction
Description : . Hunsdiecker reaction is used for the preparation of (a) Alkyl chlorides and bromides (b) Alkyl nitrates and nitrites (c) Ketenes (d) Alcohols
Last Answer : Alkyl chlorides and bromides
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 : Sulphur forms the chlorides S2Cl2 and SCl2. The equivalent mass of sulphur in SCl2 is [EAMCET 1985] (A) 8 g/mole (B) 16 g/mole (C) 64.8 g/mole (D) 32 g/mole
Last Answer : (D) 32 g/mole
Description : For which of the following classes of salts are all of its compounds soluble in water? w) sulfates x) nitrates y) hydroxides z) chlorides
Last Answer : ANSWER: X -- NITRATES
Description : A `[M(H_(2)O)_(6)]^(2+)` complex typically absorbs at around 600 nm. It is allowed to react with ammonia to form a new complex `[M(NH_(3))_(6)]^(2+)`
Last Answer : A `[M(H_(2)O)_(6)]^(2+)` complex typically absorbs at around 600 nm. It is allowed to react with ammonia ... A. 800 nm B. 580 nm C. 620 nm D. 320 nm
Description : 4° F will be equivalent to (a) 77° X (b) 113.3° X (c) 128.6° X (d) 154.4° X
Last Answer : Ans:(c)
Description : If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array
Last Answer : B. critical phased array
Description : 1 rad is equal to A. 57.3° B. 54° C. 45° D. 90°
Last Answer : 57.3°
Description : The slope correction may be ignored if (A) The slope of the ground is less than 3° (B) To slope of the ground is say 1 in 19 (C) Both (a) and (b) (D) Neither (a) nor (b)
Last Answer : (C) Both (a) and (b
Description : The slope correction for a 3° slope for a length of 100 m, is (A) -0.11 m (B) -0.12 m (C) -1.87 m (D) -0.137 m
Last Answer : (D) -0.137 m
Description : The reduced bearing of a line is N 87° W. Its whole circle bearing is (A) 87° (B) 273° (C) 93° (D) 3°
Last Answer : (B) 273°
Description : A member is balanced at its end by two inclined members carrying equal forces. For equilibrium the angle between the inclined bars must be (A) 3° (B) 45° (C) 90° (D) 120°
Last Answer : (D) 120°
Description : An aircraft is travelling at 100kts forward speed on a 3° glidescope. What is its rate of descent? a. 500 ft/min b. 300 ft/min c. 250 ft/min d. 600 ft/min
Last Answer : a. 500 ft/min
Description : In standard disc plow the tilk angel varies between: A.30-40 ° B.40-45° C.20-25° D.2-3°
Last Answer : C.20-25°
Description : The commonest form of iron & manganese found in ground water as pollutant is in the form of their (A) Carbonates (B) Bi-carbonates (C) Chlorides (D) Sulphides
Last Answer : (B) Bi-carbonates