Question # 1

Which one of the following gases has lowest density at room temperature:

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NH₃

Ne

N₂

CO

Cholesterol is a precursor of steroid hormones. Choose the class of steroid

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A carbohydrate

A hydrocarbon

A natural lipid

A protein a hydrocarbon

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

Which of the following compound shows the geometrical isomerism

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2-butene

2-butyne

2-butanol

Butanol

Glucose and gulose are ____ for each other

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Geometrical isomers

Metamers

Apimers

None

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

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both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

Essential alpha-amino acids are those which are necessary in the diet.

Which one is an essential alpha-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

The volume of 2.8 g of CO at 27°C and 0.0821 atm is

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30 dm³

3 dm³

0.3 dm³

1.5 dm³

Transition compounds which occur as tripositive ions have no

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4s-electron

3p-electron

3s-electron

2s-electron

Which of the elements has seven electrons in d-subshell?

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Zn

Co

Cu

Fe

Which of the following are responsible for the colour developed in transition elements compounds?

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s-orbitals

p-orbitals

d-orbitals

f-orbitals

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde

Cell in which an electric current drives a non-spontaneous reaction is called

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Electrolytic cell

Voltaic cell

Biological cell

Electrochemical cell

Which of the following is the strongest acid?

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CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

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The radiations emitted in emission spectrum are absorbed in absorption spectrum

Atomic emission spectrum is continuous

Atomic absorption spectrum is continuous

Distance between the lines increases

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Solvent extraction is an equilibrium process and it is controlled by :

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law of mass action.

the amount of solvent used.

distribution law.

the amount of solute.

A colloidal gel is:

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3Ca, Al₂O₃

CaSO_2.2H₂O

3CaAl₂O₃.3CaSO₄.2H₂O

3Ca.Al₂O₃.6H₂O

Which one is the major reason for pollution in high cities?

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Fossil fuel

Acid rain

Heat dispersion

None of the above

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

The amount of heat evolved or absorbed by keeping reactants and products at one atmospheric pressure at room temperature is called

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Heat of formation

Standard heat of formation

Standard enthaply change

None

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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