Question # 1

A fat or oil is characterised for extent of unsaturation by one of the following number,which one

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rancidity number

acid number

iodine number

saponicfication number

The cause of minamate disease is the pollution of:

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arsenic (As) into atmosphere

industrial waste having Hg

organic waste in drinking H₂O

oil spills in H₂O

Vapour pressure is not affected by

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Surface area

Intermolecular forces

Temperature

Nature of liquid

Theoretically, the temperature at which volume of gas become equal to zero is called

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Boiling point of water

Zero absolute

Zero Kelvin

both B and C

The pH rain of acid rain is

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8 - 7

7 - 6.5

6.5 - 6

less than 5

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

Which of the following enthalpy change always have a negative value

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∆Hf

∆H sol

∆Hc

∆Hat

What is distilled first?

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Liquid CO₂

Liquid N₂

Liquid O₂

Liquid H₂

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

Which type of motion is exhibited by gases?

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Vibrational

Transitional

Rotational

All of them

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

A chemical reaction A---------->B is said to be in equilibrium when :

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Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Conversion of A to B is 50% complete

Complete conversion of A to B has taken place.

Which of the following undergoes uncleophilic substitution exclusively by S_N1 mechanism?

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Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl choride

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

Alkaline earth metals

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

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-76 KJ

-57 KJ

-171 KJ

-114 KJ

Denaturation of protein means the structure of protein is disrupted, indicate which factor foes not denature protein

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Heating protein

pH changes

Oxidising agent

Keeping pH 7.35

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

The shape of methanol, ammonia and water molecule can be explained by assuming

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Sp³hybridization

Sp²hybridization

Sp hybridization

All of these

When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :

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H⁺

Na⁺

OH^-

Cl^-

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