Question # 1

Which one of the following is NOT a nucleophile

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NH2+

BF3

H2O

CH3-

The volume occupied by 1.4g of N2at STP is:

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2.24 dm3

1.12 dm3

112 cm3

22.4 dm3

In the atosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

In NaCl cyrstal Na⁺ion is surrounded by how many ions of Cl^-

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4

6

8

10

Vegetable oil are

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unsaturated fatty acids

glycerides of unsaturated fatty acids

glycerides of saturated fatty acids

essential oil obtained from plants

H₂O is liquid at room temperature whereas H₂S is a gas because

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H₂O used as drinking water, but H₂S has rotten egg smell

H₂O is neutral. H₂S is a weak acid

stronger hydrogen bonding in H₂O than in H₂S

H₂O occurs abundantly than H₂S

In the body, carbohydrates are broken down into

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Glucose

Fatty acids

Amino acids

Nucleic acid

Which polymerization is free radical mechanism based

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Addition

Condensation

Both a and b

None

Glycine is characerized by

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Absence of an asymmeteric carbon

Absence of optical activity

The shortest amino acid

All of these

For an ideal gas,number of moles per litre in terms of its pressure P,gas constant R and temperature T is

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PT/R

PRT

P/RT

RT/P

Which one of the following is co-polymer

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PVC

PVA

Polystyrene

Terylene

Which of the following are thermoplastic materials

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PVC

Polystyrenes

Polyethylene

All these

4-d series is in the period:

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4th

5th

6th

7th

The monomeric units of starch is/are

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Glucose

Fructose

Glucose and fructose

Mannose

Which of the following compounds will not react with sodium metal to release hydrogen

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CH₃CH₂CH₃

CH₃CH₂OH

C₆H₅OH

C₆H₅CH₂OH

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃- O - CH₃

C₂H₅OH

During the process of crystallization, the hot saturated solution:

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is cooled very slowly to get large size crystals

is cooled at a moderate rate to get medium sized crystals of the product

is evaporated to get the crystals of the products

is mixed with an immiscible liquid to get the pure crystals of the product.

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2, 2, 4-trimethylpentane

2, 4, 4-trimethylpentane

2, 4, 4-methyepentane

2, 2, 4-methylpentane

In the particular reaction for the valueK_{c 1 x}10^-25which statement is correct :

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Almost forward reaction is completed.

Amount of reactant is negligible as compared to product.

Amount of product is negligible as compared to reactant.

Amount of product is equal to amount of reactant.

Acidification of the soils due to addition of synthetic nitrogen fertilizer, is corrected by using

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Gypsum

Sodium nitrate

Limestone

Potassium nitrate

The divisibility of atom was shown by

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Stoney

J.J. Thomson

Millikan

Rutherford

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

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Sp³hybridization

Sp²hybridization

Sp hybridization

All of these

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