Question # 1

Which element exists as discrete small molecules in the solids state

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Aluminum

Silicon

Iodine

Sodium

The pressure of gas at constant temperature in a container of 2dm3 is 10 atm what will be its final pressure if it is connected with 10 dm3 container

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2 atm

1.6 atm

5 atm

I atm

The highest melting point is observed by

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Butanoic acid

Propanoic acid

Pentanoie acid

HCI

Which of the following is precursor of T3 and T4

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Gaba

Dopa

B-Alanine

Di-iodotyrosine

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

Empirical formula of monosaccharide is

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(CHO)_n

CH_nO_n+1

C_nH₂O

(CH₂O)_n

Hess's law is analogous to

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Law of heat summation

law of increasing entropy

Law of heat exchange

Ist law of thermodynamics

In crystal structure of sodium chloride,the arrangement of CI^- ions is

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Fcc

Both fcc and bcc

Bcc

None of these

What will be the shape of a molecule which containstwo sigma bond pairs and one lone pair?

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Linear

V shape

Tetragonal

Triangular

Monosacharide belong to the group

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Fats

Carbohydrates

Lipids

Proteins

NaH is

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Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

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120 C

240 C

20 C

4 C

Which one of the following properties is not correct for ozone?

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It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

The volume occupied by 1.4 g of N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

Formula of acetone is:

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HCHO

CH₃CHO

CH₃OCH₃

CH₃OC₂H₅

Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is

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Carboxylic acid > phenol > alcohol

Carboxylic acid > alcohol > phenol

Phenol > carboxylic acid > alcohol

Alcohol > phenol > carboxylic acid

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

Metallic conduction is also called as :

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Ionic conduction.

Protonic conduction.

Electronic conduction

Super conduction

Hydrocarbons are organic compounds which contain elements such as

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Hydrogen

Carbon

Hydrogen and carbon

Halogens

Simple sugars are :

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Monosacchrides

Disaccharides

Oligo saccharides

Trisaccharides

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

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