Question # 1

Proteins have linkage between amino acids

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imide

amide

ester

ether

Protein are classified into

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Simple protein

Complex proteins

Derived proteins

All of these

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Which element is expected to show the greatest tendency to form some covalent compounds?

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aluminium

calcium

magnesium

sodium

London dispersion forces are also called

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Ion-dipole forces

Dipole-induced dipole forces

Dipole-dipole forces

Instantaneous dipole induced dipole forces

pH value of pepsin is:

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3

2

4

1.4

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

Photochemical smog consists of higher concentration of:

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Oxidants

Ozone

a & b

NO₃

Which of the following species is used to formation of glycerol fatty acid from triglyceride

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NaOH

Ni

Lipase

All

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Simple sugars are :

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Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

Which of the following polymers is used for weather resistant paints

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Arcylic resins

Polyvinyl acetate

Polystyrene

PVC

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

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0.81°C

1.61°C

1.81°C

0.61°C

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

Plastics are a pollution problem because many plastics:

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

What is the shape of Fe(CO)₅molecule?

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Tetrahedral

Octahedral

Trigonal bipyramidal

Square pyramidal

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Zero

253 sec

150 sec

500 sec

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

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Diethyl ether

n-Butyl alcohol

Isobutyl alcohol

sec-Butyl alcohol

What is the molarity of H₂SO₄solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?

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4.18 M

8.14 M

18.4 M

18 M

Which one of the following particles has amass 1/1836 time, that of hydrogen?

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Neutron.

Proton.

Electron.

Positron.

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

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3.74

10.26

4.74

9.26

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