Question # 1

Hybridzation explain the --------- of orbitals

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Type of bonding

Shapes

Shape and type of bonding

None of above

To calculate volume of the solvent, we need to know, the :

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Density of solute

Normality of solute

Mass of solute

Molarity of solute

If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is

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0.1

0.01

0.2

0.0196

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

The open chain organic compounds are called

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Linear compounds

Aromatic

Aliphatic

Both A and B

Which one of the following particles has amass 1/1836 time, that of hydrogen?

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Neutron.

Proton.

Electron.

Positron.

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Iodine value of an oil or fat may be defined as

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The number of grams of iodine taken up by 1 g of the oil or fat

The number of grams of iodine taken by 10 g of the oil or fat

The number of grams of iodine taken by 100 g of the oil or fat

None of the above

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

What is the volume in cm³of 3.01 x 10²³molecules of O₂gas at S.T.P

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1000 cm³

11000 cm³

1120 cm³

11200 cm³

Either, an organic compound has close resemblance in structure and thus a derivative of:

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Water

Oxides of lithium

Oxides of magnisium

Oxides of aluminium

The structure of ICI₂is

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Trigonal

Trigonal bipyramidal

Octahedral

Square planar

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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NaH is

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Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

An oil or fat with no double bond have iodine number:

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Zero

100%

50%

Minimum

Which of the following is an ortho-para directing group

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The three alternate single and double bonds in the benzene ring are called

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Conjugate bonds

Resonating bonds

Both A and B

None of above

The substance which increases rate of reaction but remains unchanged at the end of reaction is called :

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Catalyst.

Indicator.

Promoter.

Activator.

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

When electric current is used to carry out non-spontaneous redox, the process is called

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Hydrolysis

Electrolysis

Decomposition

Neutralization

Which of the following is a polyamide?

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Nylon

Orlon

Teflon

Terylene

Phenol is also known as

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Acetic acid

Carbolic acid

Tararic acid

Trichloroacetic acid

Which one of the following gases is used for artificial ripening of fruits ?

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Ethane

Ethyne

Methane

Propane

Carboxylic acid, ester, amide and amino groups are shown. Which is the correct description of these functional groups

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On hydrolysis of starch, we finally get

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Glucose

Fructose

Both

Sucrose

When acetamide reacts with Br₂and caustic soda, then we get

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Acetic acid

Bromoacetic acid

Methyl amine

Ethylamine

When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called

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Strecker synthesis

Cory house synthesis

Williamson;s synthesis

None of these

A condensation polymer among the following is

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Dacron

PVC

Polysterene

Teflon

Peptide bond is a key feature in

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Polysaccharide

Proteins

Nucleotide

Vitamins

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