Which observations are made in the reaction of hexane with bromine water?

Last Answer : The reaction that give good yield of n-Hexane is :- A. `undersetoverset(Na//"dry ether")(rarr)(CH_(3)CH_(2 ... 2)CH_(2)CH_(2)CH_(2)Cl` D. All of them

Benzene reacts with H2 at 150°C at 30 atm in the presence of Ni catalyst to give (a) Cyclohexane (b) Cyclohexene (c) n-Hexane (d) No reaction occurs

Description : Benzene reacts with H2 at 150°C at 30 atm in the presence of Ni catalyst to give (a) Cyclohexane (b) Cyclohexene (c) n-Hexane (d) No reaction occurs

Last Answer : Cyclohexane

Leaching of sugar from sugar beets is done by (A) Hot water (B) Hexane (C) Dilute H2SO4 (D) Lime water

Description : Leaching of sugar from sugar beets is done by (A) Hot water (B) Hexane (C) Dilute H2SO4 (D) Lime water

Last Answer : (A) Hot water

Leaching of coffee from coffee beans is done by (A) Hot water (B) Hexane (C) Lime water (D) Dilute H2SO4 (hot)

Description : Leaching of coffee from coffee beans is done by (A) Hot water (B) Hexane (C) Lime water (D) Dilute H2SO4 (hot)

Last Answer : (A) Hot water

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.

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.

Describe an activity to observe what happens when quick lime is added to water taken in a beaker. State two important observations and name the type of reaction taking place. -Chemistry

Description : Describe an activity to observe what happens when quick lime is added to water taken in a beaker. State two important observations and name the type of reaction taking place. -Chemistry

Last Answer : Answer. Aim: To observe what happens when quicklime is added to water taken in a beaker. Materials Required:- Quicklime (calcium oxide), water, beaker.Procedure: 1. Take 5 g of calcium oxide in a ... example for each of decomposion reaction carried out with help of (i) Electricity (ii) Heat (iii)

Which of the following observations is / are not correct about the given equation: Pb(NO 3 ) 2 (aq) + 2 KI (aq)  PbI 2 (s) + 2KNO 3 (aq) (a) PbI 2 is yellow precipitate insoluble in water (b) It is precipitation reaction (c) It is single displacement reaction (d) It is very fast reaction

Description : Which of the following observations is / are not correct about the given equation: Pb(NO 3 ) 2 (aq) + 2 KI (aq)  PbI 2 (s) + 2KNO 3 (aq) (a) PbI 2 is yellow precipitate insoluble in water (b) It is precipitation reaction (c) It is single displacement reaction (d) It is very fast reaction

Last Answer : (c) It is single displacement reaction

What is hexane ?

Description : What is hexane ?

Last Answer : Hexane / ˈhɛkseɪn / a saturated hydrocarbon with six carbons. It is a colorless gaseous substance. It is formed only by a single bond by carbon and hydrogen. In its structure, like other hydrocarbons, each carbon forms a bond with four separate atoms. Chemical signal of hexane: C6H14 .

Catalyst used in conversion of n-hexane into benzene in:

Description : Catalyst used in conversion of n-hexane into benzene in:

Last Answer : Catalyst used in conversion of n-hexane into benzene in: A. `AlCl_(3)` B. `SiO_(2)-Al_(2)O_(3)` C. `Cr_(r)O_(3)-Al_(2)O_(3)` D. `MnO_(2)`

The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Description : The compound that has the least value for octane number is – (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Last Answer : (4) n-heptane Explanation: Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand. Isooctane (upper) has an octane rating of 100 whereas n-heptane has an octane rating of O.

Solvent used in the deasphalting process is (A) Furfural (B) Phenol (C) Propane (D) Hexane

Description : Solvent used in the deasphalting process is (A) Furfural (B) Phenol (C) Propane (D) Hexane

Last Answer : (C) Propane

The solvent used in Barisol dewaxing process is (A) Hexane (B) Furfural (C) Benzol and ethylene dichloride (D) Methyl ethyl ketone (MEK

Description : The solvent used in Barisol dewaxing process is (A) Hexane (B) Furfural (C) Benzol and ethylene dichloride (D) Methyl ethyl ketone (MEK

Last Answer : (C) Benzol and ethylene dichloride

Which of the following is the most commonly used leaching solvent in vegetable oil industry? (A) Phenol (B) Hexane

Description : Which of the following is the most commonly used leaching solvent in vegetable oil industry? (A) Phenol (B) Hexane

Last Answer : (B) Hexane

__________ is used as an 'entrainer' for the separation of acetic acidwater mixture by distillation. (A) Furfural (B) Benzol (C) Butyl acetate (D) Hexane

Description : __________ is used as an 'entrainer' for the separation of acetic acidwater mixture by distillation. (A) Furfural (B) Benzol (C) Butyl acetate (D) Hexane

Last Answer : (C) Butyl acetate

Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane

Description : Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane

Last Answer : (B) Butyl alcohol

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

Consider the three isomeric alkanes n-hexane, 2,3-dimethylbutane, and 2- methylpentane. Which of the following correctly lists these compounds in order of increasing boiling point? (a) 2,3-dimethylbutane < 2-methylpentane < n-hexane (b) 2-methylpentane < n-hexane < 2,3-dimethylbutane (c) 2-methylpentane < 2, 3-dimethylbutane < n-hexane (d) n-hexane < 2-methylpentane < 2,3-dimethylbutane

Description : Consider the three isomeric alkanes n-hexane, 2,3-dimethylbutane, and 2- methylpentane. Which of the following correctly lists these compounds in order of increasing boiling point? (a) 2,3-dimethylbutane < 2- ... < 2, 3-dimethylbutane < n-hexane (d) n-hexane < 2-methylpentane < 2,3-dimethylbutane

Last Answer : 2,3-dimethylbutane < 2-methylpentane < n-hexane

Which of the following compounds does not dissolve in concentrated H2SO4 on warming? (a) n-Hexane (b) Diethyl ether (c) 1-Butene (d) Aniline

Description : Which of the following compounds does not dissolve in concentrated H2SO4 on warming? (a) n-Hexane (b) Diethyl ether (c) 1-Butene (d) Aniline

Last Answer : n-Hexane

Which of the following alkanes will have the lowest boiling point? (a) n-Heptane (b) Isopentane (c) n-Hexane (d) Neopentane

Description : Which of the following alkanes will have the lowest boiling point? (a) n-Heptane (b) Isopentane (c) n-Hexane (d) Neopentane

Last Answer : Neopentane

How many isomers are possible for hexane? (a) 4 (b) 5 (c) 6 (d) 7

Description : How many isomers are possible for hexane? (a) 4 (b) 5 (c) 6 (d) 7

Last Answer : 5

Solvent used for extraction of oil is (A) Hexane (B) Methyl ethyl ketone (C) Furfural (D) None of these

Description : Solvent used for extraction of oil is (A) Hexane (B) Methyl ethyl ketone (C) Furfural (D) None of these

Last Answer : (A) Hexane

Which of the following is not an insecticide? (A) Hydrocyanic acid (B) Nicotine (C) Sodium fluoride (D) Hexane

Description : Which of the following is not an insecticide? (A) Hydrocyanic acid (B) Nicotine (C) Sodium fluoride (D) Hexane

Last Answer : (D) Hexane

Which of the following is NOT an aromatic hydrocarbon? w) naphthalene x) hexane y) styrene z) xylene

Description : Which of the following is NOT an aromatic hydrocarbon? w) naphthalene x) hexane y) styrene z) xylene

Last Answer : ANSWER: X -- HEXANE

The compound that has the least value for octane number is : (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Description : The compound that has the least value for octane number is : (1) 2-methyl heptane (2) Iso-octane (3) 2,2-dimethyl hexane (4) n-heptane

Last Answer : n-heptane

2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Description : 2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Last Answer : Answer. (i) •Green colour of Fe SO4 disappears and reddish brown solid is formed. • Smell of burning sulphur. (ii) Decomposition reaction

Which is the best description of the behaviour of bromine in the reaction given below `H_(2)O+Br_(2) rarr HOBr+HBr`

Description : Which is the best description of the behaviour of bromine in the reaction given below `H_(2)O+Br_(2) rarr HOBr+HBr`

Last Answer : Which is the best description of the behaviour of bromine in the reaction given below `H_(2)O+ ... . Oxidized C. Reduced only D. Proton acceptor only

The product formed by the reaction of acetamide with bromine in presence of `NaOH` is

Description : The product formed by the reaction of acetamide with bromine in presence of `NaOH` is

Last Answer : The product formed by the reaction of acetamide with bromine in presence of `NaOH` is A. `CH_(3)CN` B. `CH_(3) ... `CH_(3)CH_(2)OH` D. `CH_(3)NH_(2)`

4-amino-3-methylbutanoic acid is treated with thionyl chloride followed by ammonia to obtain compound X. X on reaction with, bromine in an alkaline me

Description : 4-amino-3-methylbutanoic acid is treated with thionyl chloride followed by ammonia to obtain compound X. X on reaction with, bromine in an alkaline me

Last Answer : 4-amino-3-methylbutanoic acid is treated with thionyl chloride followed by ammonia to obtain compound X. X on ... B. 80 mL C. 120 mL D. 200 mL

concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo

Description : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo

Last Answer : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What ... gt l_(2) gt H_(2)SO_(4)`

The reaction between ethylene and bromine is an example of:

Description : The reaction between ethylene and bromine is an example of:

Last Answer : The reaction between ethylene and bromine is an example of: A. electrophilic additon B ... C. nucleophilic addition D. nucleophilic substitution

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

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

Which halogen does not appreciably react with methane in a free-radical substitution reaction? (a) chlorine (b) bromine (c) iodine (d) fluorine

Description : Which halogen does not appreciably react with methane in a free-radical substitution reaction? (a) chlorine (b) bromine (c) iodine (d) fluorine

Last Answer : iodine

What were three observations this traveler made about the life of peasants in France between 1787 and 1789?

Description : What were three observations this traveler made about the life of peasants in France between 1787 and 1789?

Last Answer : Need answer

To set out a parallel from a given inaccessible point to a given line AB, the following observations are made: Distance AB and angle PAM = a and angle PBA = b are measured where M is a point on the line BA produced. The perpendicular to the desired parallel line from A and B are: (A) AB/(cot b - cot a) (B) AB/(cos b - cos a) (C) AB/(cot a - cot b) (D) AB/(cot a - cos b)

Description : To set out a parallel from a given inaccessible point to a given line AB, the following observations are made: Distance AB and angle PAM = a and angle PBA = b are measured where M is a point on the line BA produced. The ... cos b - cos a) (C) AB/(cot a - cot b) (D) AB/(cot a - cos b)

Last Answer : (A) AB/(cot b - cot a)

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

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

To avoid large centering error with very short legs, observations are generally made (A) To chain pins (B) By using optical system for centering the theodolite (C) To a target fixed on theodolite tripod on which theodolite may be fitted easily (D) All the above

Description : To avoid large centering error with very short legs, observations are generally made (A) To chain pins (B) By using optical system for centering the theodolite (C) To a target fixed on theodolite tripod on which theodolite may be fitted easily (D) All the above

Last Answer : (C) To a target fixed on theodolite tripod on which theodolite may be fitted easily

Pick up the correct statement from the following(A) The first man-made satellite, Sputnik-l' was launched on 4th October, 1957 (B) The United State's Explorer 6 transmitted the first picture of the earth in August 1959 (C) Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960 (D) All of these

Description : Pick up the correct statement from the following (A) The first man-made satellite, Sputnik-l' was launched on 4th October, 1957 (B) The United State's Explorer 6 transmitted the first picture ... observations, started systematic earth observations from space from 1, April, 1960 (D) All of these

Last Answer : Answer: Option D

Following observations were made during examination of a newborn child. On the basis of given observations, ascertain the APGAR score (1) Newborn makes grimaces on stimulation of sole of the Foot. (2) Respiration slow & irregular (3) Heart rate – 90/min (4) There was some flexion of the limbs (5) Color of the body was pink Options: 1) 5 2) 6 3) 7 4) 8

Description : Following observations were made during examination of a newborn child. On the basis of given observations, ascertain the APGAR score (1) Newborn makes grimaces on stimulation of sole of the Foot. (2) Respiration slow & irregular (3 ... 5) Color of the body was pink Options: 1) 5 2) 6 3) 7 4) 8

Last Answer : Correct Answer: 2) 6

In a cross joint tensile test the following observations were made: Specimen width 20mm, Material thickness 20mm, Max Load: 180kN, Break position: Parent Plate. What is the UTS? a) 45 kN/mm b) 450 N/mm2c) 39 kN/mm2d) 39 N/mm2

Description : In a cross joint tensile test the following observations were made: Specimen width 20mm, Material thickness 20mm, Max Load: 180kN, Break position: Parent Plate. What is the UTS? a) 45 kN/mm b) 450 N/mm2c) 39 kN/mm2d) 39 N/mm2

Last Answer : b) 450 N/mm2

In a welding procedure transverse joint tensile test the following observations were made. The specimen CSA was recorded as 30mm x 20mm and the maximum load applied was recorded as 200kN. What is the UTS? a) 33kN/mm2b) 333N/mm2c) 3333N/mm2d) 33N/mm2

Description : In a welding procedure transverse joint tensile test the following observations were made. The specimen CSA was recorded as 30mm x 20mm and the maximum load applied was recorded as 200kN. What is the UTS? a) 33kN/mm2b) 333N/mm2c) 3333N/mm2d) 33N/mm2

Last Answer : b) 333N/mm2

Why cant there be no such compound as CBr5 give an acceptable chemical formula for a compound that is made of only carbon and bromine?

Description : Why cant there be no such compound as CBr5 give an acceptable chemical formula for a compound that is made of only carbon and bromine?

Last Answer : Carbon atoms have 4 valence electrons, so it can form only 4 bonds. CBr5 would require carbon to form 5 bonds. A molecule composed of carbon and bromine atoms would be CBr4, which is carbon tetrabromide.

Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Description : Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry

Last Answer : Answer. (a) Carbon forms large number of compounds since carbon is small in size and can form stable covalent bonds (catenation) and it shows tetravalency. (b) Air holes of gas burner are ... not get blackened. (c) Some synthetic detergents are non-biodegradable, therefore, cause pollution of water.

A sample of water from a river was analyzed for the presence of metal ions and the observations were recorded as given below `{:("Reagent added","Obse

Description : A sample of water from a river was analyzed for the presence of metal ions and the observations were recorded as given below `{:("Reagent added","Obse

Last Answer : A sample of water from a river was analyzed for the presence of metal ions and the observations were recorded as given ... C. `Li^(+)` D. `Mg^(2+)`

The following observations were taken for determining surface tension T of water by capillary method: (A) 0.15% (B) 1.5%

Description : The following observations were taken for determining surface tension T of water by capillary method: (A) 0.15% (B) 1.5%

Last Answer : The following observations were taken for determining surface tension T of water by capillary method: diameter of capillary ... (C) 2.4% (D) 10%

Rotary drilling (A) Is not suitable for deposits containing very coarse gravel (B) Hinders the ground water observations and permeability test (C) Is not economical for holes of less than 10 cm (D) All the abov

Description : Rotary drilling (A) Is not suitable for deposits containing very coarse gravel (B) Hinders the ground water observations and permeability test (C) Is not economical for holes of less than 10 cm (D) All the above

Last Answer : Answer: Option D

During percussion drilling (A) Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole (B) Caving or mixing of strata are caused in soft soils or cohesionless soils (C) The soil to a considerable depth below the bottom of the hole gets disturbed (D) All the above

Description : During percussion drilling (A) Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole (B) Caving or mixing of strata are caused in soft soils or ... The soil to a considerable depth below the bottom of the hole gets disturbed (D) All the above

Last Answer : Answer: Option D

Which observations are made in the reaction of hexane with bromine water?

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