Question # 1

Which compound shows the highest melting point

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water

Propanoic acid

Methanoic acid

Ethanoic acid

When equal proportion of DH3_ l and C2H5 ___ l are treated with Na metal in preasence4 of dry ether, the number of possible hydrocarbons obtained will be:

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5

4

3

2

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

Coenzymes are the species which increase the activity of enzymes. They are chemically

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Metal ions

non-metals

Organic acids

Organic bases

Cane sugar on hydrolysis gives

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Glucose+Glucose

Glucose+Fruclose

Glucose+Galactose

Glucose+Gacatose

The derivatives that cannot be prepared directly from the acetie acid

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Acetamide

Acetic anhydride

Ethyl acetate

Ester

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grams of fat, this is called

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oil number

saturation number

iodine number

un saturation number

The simplest separating unit of a polymer is called:

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Monomer

Dimer

Trimer

Macromer

Methyl butyrate has an smell of:

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apple

pine apple

banana

winter green

Molar mass of repeating unit of PVC monomer is:

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43

53

63

73

One mole of SO2 contains

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6.022 x 10(23) atoms of oxygen

6.022x 10 ê23 atoms of sulfur

18.1x 10 (23) molecules of SO2

4 g molecule of SO2

When chloroform is boiled with NaOH, it gives

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Formic acid

Trihydroxymethane

Acetylene

Sodium formate

The element with highest electron affinity among the halogen is

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F

Cl

Br

I

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Gooch crucible is made of:

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Brass

Porcelain

Bronze

.Gold

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Reaction of Grignard's reagent eith aldehyds other formaldehyde gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-alcohol

Ter-alcohol

Carboxylic

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Catenation is a process in which carbon shows the properties of making

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Multiple bonds

Hybridization

Long chains or rings of carbon atom

Showing isomerism

An artificial smell of banana is produced in many articles y using esters which of the following is that

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Amyl acetate

Isoamyl valerate

Octyl acetate

Methyl butyrate

Diethyl ether is obtained by Williamsons synthesis using

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Ethanol + Na + C₂H₅Br

Ethanol + Mg + C₂H₅Br

Methanol + Na + CH₃Br

Methanol + Mg + CH₃Br

Ammonia is injected under the soil surface:

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1 Feet

6 inches

6 Feet

9 inches

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