Question # 1

The chemical formula of chile salt peter is

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Na₂CO₃

KNO₃

NaNO₃

NaNO₂

On the basis of VSEPR theory SO₂is a

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Liner molecule

A bent molecule

A strong molecule

A gaseous molecule

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

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Which of the following species is paramagnetic?

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CO₂

NO

O^2-

CN

Which of the following reagents is used to distinguish acetone and acetophenone

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NaHSO₃

Grinard reagent

Na₂SO₄

NH₄Cl

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

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Caronium ion

Carbanion

Oconium ion

Carba ion

Rectified spirit contains alcohol about:

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80%

85%

90%

95%

The example of a photo chemical reaction is photosynthesis has order of reaction :

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1

2

0

3

The colour of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

50 cm³of 0.05 molar nrea (N₂H₄CO) solution has % W/N concentration

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6%

3%

0.3 %

0.6 %

General formula of aliphatic carboxylic acids:

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R---OH

R----COH

R----CO---R

RCOOH

Which is used as an antifreeze?

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Glycol

Ethyl alcohol

Water

Methanol

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

Compounds having the same molecular formula, but different functional groups show

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Metamerism

Position isomerism

Chain isomerism

Functional group isomerism

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

Oxidation of methyl alcohol gives

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Formaldehyde

Acetone

Ester

Acid

Which bond is most stable

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C - Cl

C - F

C - Br

C - I

Direct conversion of solid into vapors is called :

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Crystallization

Sublimation

Obligation

Vaporization.

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

Which of the following polymers is used for weather resistant paints

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Arcylic resins

Polyvinyl acetate

Polystyrene

PVC

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

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Na₂CO₃

NaHCO₃

Ca(OH)₂

CaCO₃

Which of the following factors does not influenced the rate of reaction

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Concentration of the reaction

Nature of the reactants

Molecularity of the reaction

Temperature

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

N₂O₄⇌ 2NO₂

For the above reaction, which of the Following expression of K_c correct :

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Kc = [ N₂O₄]/[ NO₂]²

Kc = [ N₂O₄]/ [NO₂]

Kc = [ N₂O]²/[ N₂O₄]

Kc = [ N₂O₄]/[ N O₂]

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0.073

0.147

0.05

0.026

acetylene can be converted into-while passing through a Cu-tube at 300°C:

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Glyoxal

Vinyl acetylene

Vinyl alcohol

Benzene

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

β-D-glucose is a monomer for

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Strach

Cellulose

Glycogen

Protein

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

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