Question # 1

Residence time of methane in the atmosphere is

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3 - 7 days

2 -3 days

3 - 7 years

2 - 3 years

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 if 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

The attractive forces which exist between ionic compounds and water molecules are

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dipole-dipole forces

ion diopole forces

istantaneous dipole-induced dipole forces

dipole-induced dipole forces

What is component of environment?

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Atmosphere

Hydrosphere

Lithosphere

All of these

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

When wine is put in air, it becomes sour due to

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Oxidation of C2H5OH

Formation of C2H5NH2

Reduction of C2H5OH

Dissolution of CO2

The value of van der Waal s constant a for gases CO₂, N₂, and SO₂, are 3.59 ,1.39, 1.36, and 6.17 atm dm⁶ mol^-2respectively the gas which can be most easily liquefied is

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CO₂

O₂

N₂

SO₂

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Which one of the following is not a component of environment

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Biosphere

Stratosphere

Hydrosphere

Lithosphere

What is the effect of polluted air on environment

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Ozone

Acid rain

Global warming

Smog

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Which of the following statements is correct?

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Phenol is less acidic than ethyl alcohol

Phenol is more acidic than ethanol

Phenol is more acidic than carbonic acid

Phenol is more acidic than CH₃COOH

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

Acetal is produced by reacting alcohol in the presence of dry HCl with

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Acetaldehyde

Ketone

Ether

Carboxylic acid

Number of sigma bonds in P₄O₁₀is

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6

7

17

16

Sp³hybird orbitals are oriented at an angle of

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107.5°

108.5°

109.5°

103.5°

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

The electronic configuration of an atom/ion can be defined by the following

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Aufbau principle

Pauli's exclusion principle

Hund's Rule

All the above

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

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non-volatile or thermally unstable.

volatile or thermally stable.

non-volatile or thermally stable.

volatile or thermally unstable.

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