Question # 1

Which is not mineral of AI?

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Diaspore

Corrundam

Bauxite

Galena

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

Albumin is

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Insoluble in water

Heat coagulable protein

A plant protein

A protein of low biological value

Which of the following is not a secondary pollutant

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Ozone

Carbonic acid

Sulphuric acid

Carbon dioxide

Equal volume of all gases at same temperature and pressure contain number of molecules:

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multiples

equal

different

in fractions

Ecosystem is a smaller unity of

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Nydosphere

Biosphere

Lithosphere

Attmosphere

Which of the following alkyl halides shows higher reactivity?

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R __ F

R __ CI

R __ Br

R __ I

When graph is plot between P and 1/V at constant temperature. A straight line obtains which move toward ______ when temperature increase

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Pressure axis

Volume axis

1/V axis

1/P axis

Hydrogen bonding is involved in

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Solubility

Detergents

Biological molecules

All the above

A mixture of H₂, H2 and CH₄has total number of 0.51 mole and total pressure of 1 atmosphere. If the mass of H₂is 0.8 gram, then its partial pressure is

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0.4 atm

0.6 atm

0.776 atm

0.667 atm

Which compound is not formed as a result of reaction between acetic acid & HI & red phosphorous

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Ethanol

Water

lodine

Ethane

Acetaldehyde is used to make

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Rubbber

Antiseptics

Phenolic resin

All of these

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

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0.25 mole

0.5 mole

1.0 mole

2.00 mole

Which of the following is halo form

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CHBr₃

CHCI₃

CHI₃

All of these

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Increase in concentration of 1

Decrease in concentration of I₂

Increase in temperature

Increase in total pressure

The tip of the funnel should touch the side of the beaker in order to avoid

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Splashing

Leakage

Mixing

Contamination

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

calcium

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Which of these always applies to a nucleophile

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It attacks a double bond

It has a lone pair of electrons

It is single atom

It is negatively charged

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Matals usually conduct electricity because

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There are mobile electrons in the metallic structure

Metals are decomposed by current

Metals have high resistance

In metals the ions are free to move

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

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