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 : Which of the following does not react with acyl chlorides to form amides : (a) ammonia (b) 1° amine (c) 2° amine (d) 3° amine
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 : 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 : Based on the intermolecular forces involved, which of the following molecules will have the lowest boiling point? w) ethane x) methyl alcohol y) methyl amine z) methyl fluoride
Last Answer : ANSWER: W -- ethane
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 : Use the information and data given below to answer the questions Stronger intermolecular forces result in higher boiling point Strength of London forces increases with the number of electrons in the molecule ... here? (c) Why is the boiling point of HF highest while that of HCl lowest?
Last Answer : Ans :( a) In the molecules HCl, HBr and HI, dipole-dipole interaction and London forces are present. (b) Dipole moment of HCl > HBr > HI but boiling point of HCl < HBr
Description : Predict what will happen if intermolecular forces between the molecules are very weak
Last Answer : Ans. When intermolecular forces are very weak , molecules do not cling together t o make liquid and solid.
Description : Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules
Last Answer : Ans. (a) Dipole-Dipole interactions. (b)H-Bond. (c)Dispersion forces. (d)Dispersion forces. (e)Dispersion forces. (f)Induced dipole-dipole interactions.
Description : Name two intermolecular forces that exist between HF molecules in liquid state.
Last Answer : Ans. Dipole-dipole interaction and hydrogen bonding.
Description : Why does water form intermolecular hydrogen bonds with other molecules?
Last Answer : Feel Free to Answer
Description : Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its (A) Tensile strength (B) Chemical resistance (C) Flexibility (D) All (A), (B) & (C)
Last Answer : (C) Flexibility
Description : Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive
Last Answer : A mixture of achiral compounds will be optically inactive
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 : A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports [AIIMS 1992] (A) Law of constant composition (B) Law of conservation of mass (C) Law of reciprocal proportions (D) Law of multiple proportions
Last Answer : (A) Law of constant composition
Description : When a researcher do not possess the quality of collection of the facts from social environment, such research will Options: A) not be a pure research B) be a malicious research C) be a irrelevant research D) pure research
Last Answer : A) not be a pure research
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 : Out of two anticholinesterases, drug X' is a tertiary amine while drug Y' is a quarternary ammonium compound. Then: A. Drug X' is likely to be more potent than Y' B. Drug X' will be more ... a miotic C. Drug Y' will be completely metabolized in the body D. Drug Y' will produce CNS effects
Last Answer : B. Drug ‘X’ will be more suitable to be used as a miotic
Description : Molecules of a solid possess a) Rotational motion b) Vibrational motion c) Translational motion d) All of above
Last Answer : b) Vibrational motion
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 : 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 : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Last Answer : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Description : Pure cholesterol has a specific rotation of -32. A sample of cholesterol prepared in the lab has a specific rotation of -8. The enatiomeric excess of
Last Answer : Pure cholesterol has a specific rotation of -32. A sample of cholesterol prepared in the lab has a ... the sample of chloresterol is x%. X is :
Description : If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 gmol how many sodium atoms are there in the sample?
Last Answer : Need answer
Description : What data does a sample of pure water irrespective of its source contains 11.1 hydrogen and 88.9 oxygen support?
Last Answer : It might have supported Proust's law or the law of definitecomposition, or law of constant composition. But unfortunately thedata used are not accurate. The correct proportions, based onrelative atomic masses of hydrogen and oxygen being 1.008 and15.999 give the results as 11.2% and 88.8%.
Description : How can you find out whether a sample of water is pure or not?
Last Answer : Pure water boils at 100C. If there are some impurities in water, it will boil at high temperature than 100C.
Description : A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal ... . What is the value of x? a) 6 litres b) 10 litres c) 30 litres d) None of these
Last Answer : C Another way for solving this sum is by choice The mixture of 60 litres has in it 24 litres of milk and 36 litres of water. (2 : 3 :: milk water) When you remove x litres from it, you ... have 30 litres of milk and 30 litres of water - i.e. milk and water are in equal proportion.
Description : Assuming... If, primates had never existed, and therefor humans had never evolved from them, then what animal species would otherwise have been the most likely to evolve the level of intelligence that we currently claim to possess?
Last Answer : answer:LOL Maybe Dolphins or Elephants….emotionally intelligent, hardy, socially evolved. ???
Description : Which of the following statements is considered to be a DISADVANTAGE of using industrial distributors? A)Industrial distributors possess considerable technical and market information. B)The ... brands aggressively. E)Industrial distributors acquire title to the products and take possession.
Last Answer : D)Industrial distributors sell specific brands aggressively.
Description : What is intermolecular energy ?
Last Answer : The force of attraction between two molecules is called intermolecular energy.
Description : What is the force of intermolecular attraction ?
Last Answer : The force by which molecules of matter join together to form different physical structures is called intermolecular force of attraction. The form of the intermolecular attraction ball can be different -1. Dipole-Dipole attraction ball 2. Vander Walls attraction ball 3. Hydrogen bonding , etc.
Last Answer : Intramolecular energy: There is a force of attraction between the molecules of matter. Due to this the molecules are closely organized. There is also a repulsive tendency for molecules to ... each other. This combined force of attraction and repulsion of molecules is called intermolecular energy.
Description : Explain the effect of increasing the temperature of a liquid, on intermolecular forces operating between its particles. What will happen to the viscosity of a liquid if its temperature is increased? Arrange the following in increasing order of viscosity-water, hexane, glycerine.
Last Answer : Ans. On increasing the temperature , the kinetic energy of liquid molecules increases so that it can overcome the attractive forces between the molecules and hence liquid can flow more easily i.e. viscosity decreases. Order of increasing viscosity : hexane < water < glycerine.