Physical Properties of Ethers

• Which of the following is distinguish test for ether? a) Lucas test b) FeCl3 test c) Molisch test d) Zeisel test

• Which of the following statement is not true about ethers? a) The lower ethers are highly volatile and flammable b) Lower ethers also act as anaesthetics c) Ethers are not organic solvents d) Simple ethers (such as diethyl ether) are tasteless

• Why ether is more volatile than an alcohol having the same molecular formula? a) dipolar character of ethers b) alcohols having resonance structures c) inter-molecular hydrogen bonding in ethers d) inter-molecular hydrogen bonding in alcohols

• Why the boiling point of ethyl alcohol is much higher than that of dimethyl ether though both have the same molecular weight? a) Ether is insoluble in water b) Methyl groups are attached to oxygen in ether c) Dipole moment of ethyl alcohol is less d) Ethyl alcohol shows hydrogen bonding

• Which of the following has lower boiling point than dimethyl ether? a) Pentane b) Propane c) Tetrahydrofuran d) n-butanol

• Which of the following product is formed, when ether is exposed to air? a) Oxide b) Alkanes c) Alkenes d) Peroxide of diethyl ether

• An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4, A gives diethyl ether. What are A and B? a) C2H5OH and C2H5ONa b) C3H7OH and CH3ONa c) CH3OH and CH3ONa d) C4H9OH and C4H9ONa

• What is the smell of the diethyl ether? a) Vinegar b) Sweet smell c) Rotten egg d) Fish like smell

• Which of the following statements about ethers is incorrect? a) Ethers are flammable b) Ethers form peroxides by free radical oxidation c) Ethers are widely used as extraction solvents d) An ether oxygen can only be found within an acyclic carbon chain

• How many hydroxyl groups are present in diols? a) One b) Two c) Three d) Four

• Which of the following Is the correct reason for cyclic ether are miscible in water? a) Planer structure b) Larger size c) Molecular weight d) Hydrogen bonding

• What is the general formula for dihydric alcohol? a) (CH2)n(OH)2 where n = 2,3…etc b) (CH2)n(OH)2 where n = 1,2,4… etc c) CnH2n+1OH where n = 1, 2 …etc d) (CH2)n(OH)3 where n = 3, 4, 5 …etc

• Which of the following is not the example of dihydric alcohol? a) Glycerin b) Parahydroxyphenol c) Resorcinol d) Catechol

• Which Biomolecules simply refers as “Staff of life” in the given macromolecules? a) Protein b) Lipids c) Carbohydrate d) Vitamins

• Which type of product is formed when Cold dilute alkaline solution of Bayer’s reagent reacts with alkene? a) Syn-diol b) Anti-diol c) syn- and anti-geometry will not be there in diol d) Trans diol

• Majority of the monosaccharides found in the human body are of which type stereoisomer? a) L-type b) D-type c) neutral d) racemic mixture

• Which compound is used with 1,2- dibromoethane for the formation of glycol? a) Na2CO3 b) NaHCO3 c) NaOH d) CH3COONa

• Which of the following statement is not true about preparation of alcohol? a) French chemist Charles-Adolphe Wurtz (1817–1884) first prepared ethylene glycol in 1856 b) First synthesis of glycol was from “ethylene iodide” (C2H4I2) with silver acetate and then hydrolyzed the resultant “ethylene diacetate” with potassium hydroxide c) It was synthesized from ethylene dichloride in Germany and used as a substitute for glycerol in the explosives industry d) There is no biological process for the synthesis of glycol

• How can we detect the presence of resorcinol in the solution? a) Ceric ammonium nitrate test b) Lucas test c) Phthalic acid test d) Remini’s test

• Which is the simplest carbohydrate? a) Dihydroxy acetone b) Glycerldehyde c) Glucose d) Gulose

• In carbohydrates which are the main functional groups are present? a) Alcohol & Carboxyl groups b) Aldehyde & Ketone groups c) Hydroxyl groups & Hydrogen groups d) Carboxyl groups & Others

• Which of the following is true about Turanose? a) Reducing disaccharides of glucose and fructose b) Non-reducing disaccharide c) 7-methyl sugar d) a deoxy sugar

• Which of the following is the examples of Epimers? a) Glucose & Galactose b) Glucose & Ribose c) Mannose & Glucose d) fructose and glucose

• Which of the following is not a disaccharide? a) Sucrose b) Maltose c) Lactose d) Galactose