Question # 1

Proteins have linkage between amino acids

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imide

amide

ester

ether

Which method is used to prepare carboxylic acid?

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Hydrolysis of AI₄C₃

Hydrolysis of CaC₂

Hydrolysis of alkyl nitrites

Hydrolysis of alkenes

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

Dehydrogenase is an example of

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ligase

oxidoreductase

lyase

hydrolase

The gas which obey's the gas laws at all conditions of temperature and pressure is called:

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Perfect gas

Super gas

Ideal gas

Real gas

Elements of group ll-A are called

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f-block elements

s-block elements

p-block elements

d-block elements

Which of the following is a molecular formula of vinyl acetate

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C₄H₆O₂

C₂H₄O₂

C₄H₆O₃

None of these

Natural fertilizers are materials derived form:

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plants

animals only

both plant and animals

none of all

Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between

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nitrogen and hydrogen atom

oxygen and hydrogen atom

carbon and hydrogen atom

oxygen and carbon atom

Which set of elements is good loser of electrons

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F2. Cl2, Br2

N, P. As

O. S, Se

Li, Na, K

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

In the electrolysis of aqueous solution of sodium nitrate, the ions which are reduced at the cathode are

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H₃O⁺

Na⁺

OH^-

NO^3-

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

A condensation polymer among the following is

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Dacron

PVC

Polysterene

Teflon

Naturally occurring lipids are called

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Fats

protein

Steroids

None

Alpha rays consist of:

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Neutrons.

Helium nucleus.

Protons.

Hydrogen nucleus.

When 3p orbital is complete, the entering electron goes into

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4s

3d

4p

4f

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

In H₂O molecule the bond angle is

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90°

109.5°

107°

104.5°

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Which is the most volatile compound

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Hl

HCl

HBr

HF

Coordination number of Pt in [PtCl (NO²) (NH³)⁴]^2-

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2^-

4

1

6

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