Question # 1

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

Example of non-protein amino acid

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Alanine

Citrulline

Phenylalanine

Leucine

What is distilled first?

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Liquid CO₂

Liquid N₂

Liquid O₂

Liquid H₂

One of the following is neutral amino acid

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Arginine

Lysine

Glutamine

Valine

Sponification number of a fat which requires 178,000 mg of KOH for saponification is (mol wt = 1240)

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120

143

208

210

Which of the following shows group IIIB

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Zn, Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

If similar groups are attached to the same side, of C=C of alkene then it is

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Cis isomer

Trans isomer

Tautomer

AIl

According to Lowery Bronsted concept, which of the following is considered as an acid?

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BF3

OH-

H3O+

Cl-

The system in which two out of three axes are of equal length and angles are all 90°

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cubic system

hexagonal system

trigonal system

tetragonal system

what is it difficult to cook food at high as compared to at sea level? Choose the correct reason.

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H-bonding in H₂O changes with height

temperature at the top of mountain is low

density of water decreases at the mountain

boiling point of water decreases at the mountain

1, 3, 5-Pentanetriol has secondary carbon

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3

1

2

Zero

Which of the following aqueous solutions have the lowest freezing point

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5.85% NaCI

6% urea

34.2 sucrose

All of them have same freezing points

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N₂O₄is limiting reactant

N₂H₄is the limiting reactant

Reactants are completely converted to the products

Reactions is reversible

The total number of rare earth elements is

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8

32

14

10

The empirical formula of a compound is CH₂O. What may be the compound

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C₂H₅OH

C₆H₅OH

HCOOH

A single free chlorine radical can destroy ozone molecules upto:

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100000

100

1000

10000

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

The net heat change in chemical reaction is same whether it is brought in two or more different ways in one or several steps. it is known as

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Henry's law

Joule's principle

Hess's law

Law of conservation of energy

Which is not an enzyme

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Transverses

Lipase

Lyase

None of these

An example of water soluble vitamin is

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Vitamin D

Vitamin E

Vitamin A

Vitamin C

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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Fibre

Plastic

Varnish

Polyamide resin

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