Question # 1

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

General formula of alkyl halide is:

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R----X

R----OH

R------COH

R------COOH

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

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Planar

Pyramidal

Angular

Trigonal bipyramidal

Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Spectrum of white light is continuous becuase

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Colors separated by dark spaces

There are no boundary lines between the colours

The radiations are in infrared region

The radiatins fall in ultraviolet region

Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is

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1, 1-Dimethyl-3-butene

1,1,1-Trimethyl-3-propene

3,3,-Dimenthyl-1-butene

3,3,3,-Trimethyl-1-propene

Transition elements form which type of bond

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Ionic bonds only

Covalent bonds only

Ionic and covalent bonds

Polar bonds

Cl₂reacts with CS₂in presence of AlCl₃to form

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CHCl₃

CCl₄

C₂H₅Cl

C₂H₆

The rate at which a substance reacts is directly proportional to its active mass and the rate of reaction is directly proportional to the product of the active masses of reacting substances, is called

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Law of conservation of energy

Le-Chateliers principle

Law of mass action

None of these

C₆H₆Cl₆can be obtained from

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HCl and Benzene

Cl₂and Benzene and AlCl₃

Cl₂and Benzene in diffused light

NaOCl and Benzene

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

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Live stock waste

Agricultural pesticides

Oil breaks and spills

All of the above

Aldehydes can be distinguished from ketones by using

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Schiff's reagent

Conc. H₂SO₄

Anhy. ZnCl₂

Resorcinol

Besides Zn and Cu , German silver contains the metal

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Sn

Ag

Ni

Mg

If the standard electrode potential of CU²⁺/Cu electrode is 0.34 V, what is the electrode potential of 0.01 M concentration of Cu²⁺? (T=298)

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0.399 V

0.281 V

0.222 V

0.176 V

Drained sewage has B.O.D

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More than that of water

Less than that of water

Equal to that of water

None of the above

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-76 KJ

-57 KJ

-171 KJ

-114 KJ

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

Which of the following is fully fluorinated polymer?

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Neoprene

Teflon

Thiokol

PVC

Which one is the major reason for pollution in high cities?

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Fossil fuel

Acid rain

Heat dispersion

None of the above

Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch

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Diastase

Maltase

Zymase

Invertase

Which of the following compounds will not react with sodium metal to release hydrogen

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CH₃CH₂CH₃

CH₃CH₂OH

C₆H₅OH

C₆H₅CH₂OH

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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Empirical formula

Number of atoms in a molecules

Number of isomers

Relative molecular mass

The bibre which is composed of at least 85% by weight of acrylonitrile is known as

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Royan fibre

Azlon fibre

Saran binre

Acrylic fibre

The saturated hydrocarbons usually end with suffix ______

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Ane

Ene

Yne

Oic

Which one of the following has continuous solubility curve

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NH₄NO₃

CaCI

CaCI₂. 6H₂O

Na₂SO₄. 10H₂O

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

The self linking property of carbon is called as

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Linking polymerization

Addition

Catenation

Elimination

The function of salt bridge in the galvanic or voltaic cell is to

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Carry out oxidation at anode

To carry out reduction at cathode

Carry out electrolysis

To prevent the net charge accumulation in either of the half cells

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

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