Chapter 7

(+)-Sucrose is made up of (a) \(\mathrm{L}\) -fructose and \(\mathrm{L}\) -glucose (b) D-glucose and \(\mathrm{L}\) -fructose (c) D-fructose and \(\mathrm{L}\) -glucose (d) D-glucose and \(\mathrm{L}\) -fructose

Which of the following sugars is obtained from nature, usually in a levorotaory form? (a) Maltose (b) Fructose (c) Sucrose (d) Glucose

An example of natural biopolymer is (a) rubber (b) nylon (c) teflon (d) DNA

In the ring structure of fructose, the anomeric carbon is (a) \(\mathrm{C}-6\) (b) \(\mathrm{C}-5\) (c) \(\mathrm{C}-2\) (d) \(\mathrm{C}-1\)

Teflon is a polymer of the monomer (a) \(\mathrm{CHCl}=\mathrm{CHCl}\) (b) \(\mathrm{CHF}=\mathrm{CHCl}\) (c) \(\mathrm{CHF}=\mathrm{CH}_{2}\) (d) \(\mathrm{F}_{2} \mathrm{C}=\mathrm{CF}_{2}\)

Cane sugar and invert sugar are (a) levorotatory and dextrorotatory respectively (b) dextrorotatory and levorotatory respectively (c) both levorotatory (d) both dextrorotatory

The major compound of sugar present in honey is (a) lactose (b) glucose (c) invert sugar (d) sucrose

Which one of the following statements is wrong? (a) PVC stands for polyvinyl chloride (b) Buna-S stands for natural rubber (c) PTFE stands for teflon (d) PMMA stands for polymethyl methyl acrylate

Cellulose is a linear polymer of (a) \(\alpha\) -p-fructose (b) \(\beta\) -D-glucose (c) \(\alpha\) -D-glucose (d) \(\beta-\mathrm{D}\) -fructose

Aldoses can be differentiated from ketoses by (a) periodic acid (b) Tollen's reagents (c) bromine water (d) both (a) and (c)

Which of the following sugars exhibits mutarotation? (a) Fructose (b) Glucose (c) Lactose (d) All of these

Heating of rubber with sulphur is known as (a) vulcanisation (b) bessemerisation (c) galvanisation (d) sulphonation

Which of the following is the \(\mathrm{C}-2\) epimer of \(\mathrm{D}\) -glucose? (a) D-Fructose (b) \(\quad\) L-Glucose (c) \(\mathrm{D}\) -Galactose (d) D-Mannose

Glucose reacts with an excess of phenylhydrazine to form (a) glucosone (b) glucose phenylhydrazone (c) glucosazone (d) fructose phenlhydrazone

Which of the following is a natural polymer? (a) Bakelite (b) Polythene (c) Buna-S (d) Protein

Which of the following pairs of sugars form identical osazone derivative? (a) \(\mathrm{D}\) - \((+)\) -Glucose and \(\mathrm{D}-(-)\) -arabinose (b) \(\mathrm{D}\) - \((+)\) -Glucose and \(\mathrm{D}\) - \((-)\) -fructose (c) D-(+)-Glucose and (+)-maltose (d) \(\mathrm{D}-(+)\) -Glucose and \((+)\) -lactose

Which of the following sugars forms an osazone derivative which is identical with that of D-glucose? (a) D-Mannose (b) D-Galactose (c) D-Fructose (d) Both (a) and (c)

Upon hydrolysis lactose breaks down into (a) glucose and arabinose (b) glucose and fructose (c) glucose and galactose (d) glucose and mannose

Cellulose is a linear polymer of (a) \(\beta\) -glucose (b) \(\alpha\) -fructose (c) \(\alpha\) -glucose (d) amylose

On hydrolysis of starch, we finally get (a) sucrose (b) glucose (c) fructose (d) both (b) and (c)

D-glucose and D-fructose all form the same osazone derivative because all of them have (a) the same configuration at \(\mathrm{C}-5\) (b) the same constitution at \(\mathrm{C}-1\) and \(\mathrm{C}-2\) (c) the same constitution (d) the same constitution and configuration at \(\mathrm{C}-3, \mathrm{C}-4, \mathrm{C}-5\) and \(\mathrm{C}-6\) but different constitution and configuration at \(\mathrm{C}-1\) and \(\mathrm{C}-2\) which becomes identical by osazone formation

The fibre obtained by the condensation of hexamethylene diamine and adipic acid is (a) nylon-6, 6 (b) dacron (c) rayon (d) teflon

In the formation of osazone derivatives of aldohexoses and ketohexoses, the carbon atom(s) that participate(s) in the reactions is (a) \(\mathrm{C}-1\) and \(\mathrm{C}-2\) (b) \(\mathrm{C}-2\) and \(\mathrm{C}-3\) (c) \(\mathrm{C}-1\) (d) \(\mathrm{C}-2\)

In an aqueous solution of D-glucose the percentages of \(\alpha\) - and \(\beta\) -anomer at the equilibrium condition are respectively (a) \(20 \%\) and \(80 \%\) (b) \(80 \%\) and \(20 \%\) (c) \(36 \%\) and \(64 \%\) (d) \(64 \%\) and \(36 \%\)

Which of the following is a polysaccharide? (a) Cellobiose (b) Polyethene (c) Cellulose (d) Nylon

Which one of the following is a thermosetting polymer? (a) SBR (b) Nylon-6, (c) Bakelite (d) Nylon-6

Glucose gives postive silver mirror test with ammoniacal silver nitrate because it contains (a) aldehyde group (b) hydroxy group (c) ketone group (d) vicinal diol group

Which functional groups of glucose interact to from cyclic heiacetal leading to pyranose structure? (a) Ketone group at C-2 and hydroxy group at \(\mathrm{C}-5\) (b) Aldehyde group and hydroxy group at \(\mathrm{C}-5\) (c) Aldehyde group and hydroxy group at \(\mathrm{C}-4\) (d) Aldehyde group and hydroxy group at \(\mathrm{C}-6\)

Fructose reduces Fehling's solution due to the presence of (a) hydroxy group (b) ketone group (c) aldehde group (d) \(\alpha\) -hydroxyketone group

Natural rubber is a polymer of (a) butadiene (b) isoprene (c) chloroprene (d) neoprene

The formation of furanose structure of fructose involves the interaction of functional groups present at (a) \(\mathrm{C}-1\) and \(\mathrm{C}-4\) (b) \(\mathrm{C}-1\) and \(\mathrm{C}-5\) (c) \(\mathrm{C}-2\) and \(\mathrm{C}-5\) (d) \(\mathrm{C}-2\) and \(\mathrm{C}-6\)

The widely used plastic PVC is a polymerisation product of (a) \(\mathrm{CHCl}=\mathrm{CHCl}\) (b) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CCl}_{2}\) (c) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}\) (d) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCl}\)

D-Glucose reacts with anhydrous methyl alcohol in the presence of dry \(\mathrm{HCl}\) gas to form (a) \beta-methyl D-glucopyranside (b) \(\alpha\) -methyl D-glucopyranoside (c) \(2,3,4,5,6\) -penta-O-methyl o-glucose (d) both (a) and (b)

Which of the following fibres is made of polyamides? (a) Raon (b) Orlon (c) Nylon (d) Dacron

In the multi-step conversion of an aldose into next higher aldose by Kiliani- Fischer synthesis, the reagent emplyed in the first step is (a) HCN (b) \(\mathrm{NH}_{2} \mathrm{OH}\) (c) \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\) (d) \(\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{NHNH}_{2}\)

Salol can be used as (a) antiseptic (b) antipyretic (c) both (a) and (b) (d) none of these

When methyl D-glucopyranoside is oxidised with periodic acid, how many moles of the oxidising agent are consumed per mole of the sugar? (a) 2 (b) 3 (c) 4 (d) 5

The urine of a diabetic patient contains (a) glucose (b) fructose (c) sucrose (d) galactose

D-Glucose and D-mannose are (a) epimers (b) anomers (c) diastereomers (d) both (a) and (c)

In which of the following sets do the carbohydrates contain disaccharides only? (a) Maltose, lactose, starch (b) Sucrose, lactose, cellulose (c) Maltose, sucrose, lactose (d) Maltose, lactose, mannose

When glucose is treated with an excess of \(\mathrm{HIO}_{4}\), the products formed are (a) one mole of oxalic acid (COOHCOOH), three moles of \(\mathrm{HCOOH}\) and one mole of \(\mathrm{HCHO}\) (b) five moles of \(\mathrm{HCOOH}\) and one mole of \(\mathrm{HCHO}\) (c) one mole of glyoxal (CHOCHO), one mole of HCHO and three moles of \(\mathrm{HCOOH}\) (d) six moles of \(\mathrm{HCOOH}\)

Malisch test is performed for the detection of (a) carbohydrates (b) fats (c) alkaloids (d) alkyl halides

Methyl D-glucoside on reaction with \(\mathrm{HIO}_{4}\) consumes two moles of the reagent and produces the dialdehyde (A) and one mole of \(\mathrm{HCOOH}\). The result of this reaction proves that glucose has (a) a four-membered ring structure (b) a furanose structure (c) an open-chain structure (d) a pyranose structure

Plants store their reserve carbohydrates in the form of (a) starch (b) cellulose (c) glycogen (d) cellobiose

Which one is an example of vat dye? (a) Indigo (b) Alizarin (c) Malachite green (d) Congo red

Starch consists of two polymeric units, namely (a) glycogen and collagen (b) cellulose and cellobiose (c) amylose and amylopectin (d) inulin and pectin

Ampicillin is (a) an antibiotic (b) an analgesic (c) an antimalarial (d) an antipyretic

Charring of sugar is due to (a) reduction and hydration (b) reduction (c) dehydration (d) oxidation

Isoprene substances are used for making (a) natural rubber (b) propane (c) petrol (d) liquid fuel

Glucose gives silver mirror with ammoniacal silver nitrate because it has (a) ketone (b) aldehyde (c) ester (d) alcoholic \(\mathrm{AgNO}_{3}\)