Question # 1

Which one of the following has zero dipole moment

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NH3

CHCI3

H2O

BF3

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

If a = b = c and x = y = z 90° then crystal structure is

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Cubic

Tetragonal

Orthorhombic

Triclinic

Which of the following is not a carbohydrate?

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nuclic acid

strach

glycoyen

cellulose

The alcohol that does not form curbonyl compound on oxidation

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iso-butyl alcohol

neo pentyl alcohol

Ethanol

ter-butyl alcohol

The deviation of a real gas from ideal behaviour is maximum at

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-10.0°C and 50 atm

-10°C and 2 atm

100°C and 2.0 atm

0°C and 2 atm

Covalent bond is

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A weak bond

A true chemical bond

A hydrogen bond

Responsible for secondary structure of protein

Temperature at which molecular motion ceases is called

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Absolute zero

Absolute temperature

Critical temperature

Difficult to predict

The gasses in the atmosphere are essential for sustaining life on earth; Thus oxygen is required for breathing, What for is carbon dioxide required?

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to help plant to under go photosynthesis

to destroy nitrogen oxide form the atmosphere

to help to clean to atmosphere

to help in fixing of bacteria

Which Henderson equation is not correct?

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pH= pKa +log [ salt/acid]

pH = pKa - log [ salt/acid ]

pH= pKa - log[ acid/salt ]

Pka = pH - log [ salt/acid ]

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Out of 110 known elements, transition elements are

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40

60

50

80

Strong oxidizing agents have

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Greater positive value of standard reduction potential

Lesser positive value of standard

Greater negative value of standard

None of these

In exothermic reaction decrease in potential energy of the products will result in

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Decreases in kinetic energy of the particles

Increases in kinetic energy of the particles

No change in kinetic energy

Decreases in activation energy

Formation of a cation is:

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Exothermic process

Non-endothermic process

Endothermic process

None of above

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

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

1 mol of N₂O₄ was decomposed according to given equation in 1dm₃ container. At equilibrium x mole of N₂O₄ have dissociated. What is the value of K_C:

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2x/(1-x)²

4x²/(1-x)

4x/(1-x)

2x/(1-x)

The electropositive elements from

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Acidic oxides

Basic oxides

Neutral oxides

None

The solubility of KCIO₃salt in water is decreased by adding

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NaCIO₃

NaCI

KCIO₄

KCI

5-d series is in the period :

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4th

5th

6th

7th

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