Question # 1

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

Al³⁺is a symbol for aluminium

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Atom

Ion

Cation

Anion

Glacial acetic acid freezes to ice like solid at (°C)

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07

17

27

37

Rectified spirit contains alcohol about

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80%

85%

90%

95%

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

The organic compounds containing Ph-OH group are called:

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Phenol

aldehyde

Keton

Carboxylic acids

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

The high molecular weight materials which yield on hydrolysis the amino acids is called:

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Carbohydrates

Lipids

Fatty acids

Proteins

Which of the following half molar solutions will have lowest freezing point

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Solution of non-volatile, none electrolyte

Solution of non volatile, weak electrolyte

Solution of non volatile strong electrolyte

Solution of volatile, non electrolyte

Generally the bond formed by metals with non-metals is

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Ionic

Covalent

Polar

Non- polar

Fe⁺³and Mn²⁺are strong paramagnetic because the number of unpaired electrons in each is

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4

5

6

7

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

The empirical formula of a compound is CH₂O. What may be the compound

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C₂H₅OH

C₆H₅OH

HCOOH

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

The total number of d-bock transition element is

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10

14

40

30

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

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142 g

71 g

35.5 g

18.75 g

Elevation of boiling point is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

None of these above

Analytical chemistry is the science of

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Chemical characterization

Physical characterization

Biological characterization

Biochemical characterization

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

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Saran fibre

Nylon

Polyester

Acetate fibre

The energy of the first electron is helium will be

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-13.6 eV

-54.4 eV

-5.44 eV

zero

Which statement about molecule is incorrect ?

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Molecules of a substance are similar

Hemoglobin is a homo atomic molecules

Oxygen molecule is a macro molecule

It exist independently

The avtive mass of 64 g of HI in a two litre flask would be

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2

1

5

0.25

Which of the following is not a hydrocarbon

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Butane

Methyl benezene

Acetylene

Glucose

Sodium is never found free in nature because of its

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Chemical reactivity

Small ionic size

Small atomic volume

None of these

The sample being analyzed is called

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Electrolyte

Substance

Analyte

All of above

Complex protein molecules which catalyses the organic reactions in the living cells are called

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Living organisms

Enzymes

Viruses

Bacteria

In an exothermic reaction, a 10° rise in temperature will

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Decrease the value of equilibrium constant

Double the value of K_c

Not produce any change in K_c

Produce some increase in K_c

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+712 KJ mol^-1

+492 KJ mol^-1

-932 KJ mol^-1

-960 KJ mol^-1

Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?

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O₂

N₂

Br₂

F₂

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