Question # 1

When a metal rod is dipped in its one molar ionie solution

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Electricity is produced

Electricity is consumed

Redox reaction occurs

Potential difference is set up

Which one of the following is the most abundant organic substance found in nature?

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fructose

starch

glucose

cellulose

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is

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1

2

3

4

Ether show the phenomenon of

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Positional isomerism

Functional group isomeris

Meta merism

Cis trans isomerism

Which of the following alpha-Amino acids has basic R-group

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Proline

Glutamic acid

Histidine

Valine

The number of molecules in 22.4 dm3 of gas at 0°C and 1 atm are

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6.02×10(23)

6.02× 10(25)

6.02×10(22)

6.02×10(21)

Why is CO called as pollutant? reason is:

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It combines with oxygen

It inactivates glycoblysis

It combines with hemoglobin

Inactivates nerves

Which one of the following equations represents the 1st ionization energy of Na?

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Na(s) ---->Na⁺ (g) + e^-

Na(g) --->Na⁺ (g) + e^-

Na(s) --->Na⁺ (s) + e^-

Na (s) + e^- ---> Na⁺ (g)

Which one of the followings has polar covalent bonds hut is overall nom-polar molecule:

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HF

CO₂

CH₄

N₂

In a crystal a ≠ b ≠ c,a = y 90° and β ≠ 90° it is

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Monoclinic

Rhombic

Trigonal

Tetragonal

Fe⁺³and Mn²⁺are strong paramagnetic because the number of unpaired electrons in each is

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4

5

6

7

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

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Identical

Similar

Different

Similar as well as different

The hydrocarbons having double bonds normally end with suffix

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Ane

Ene

Yne

Oic

In Millikan method for determination of charge on electron the air in the chamber is ionized by

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Protons

Electric field

X-rays

a - particles

The acids obtained by the hydrolysis of fats and oils are called

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Active compound

Fatty acids

Functional group

None

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

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What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Reduction of aldehydes with HI and P gives

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Primary alcohols

Secondary alcohols

Alkanes

Tertiary alcohols

In molecules kinetic and potential energies are:

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Definite

Moderate

Indefinite

None of above

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