Question # 1

Elimination unimolecular reactions involve

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Second order kinetics

First order kinetics

Third order kinetics

Zero order kinetics

The enzyme which is found in saliva, accelerates the conversion of starch into sugar is

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Pepsin

Thrombin

Ptyalin

Fumarase

Amides are

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Strongly basic

Weakly basic

Acidic

Strongly

How much pesticides have been synthesized at present?

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Four thousand

Six thousand

Eight thousand

Ten thousand

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of:

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2 days

6 days

5 days

7 days

Primary pollutant is that:

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Waste product of an industry

Which causes cancer

Whose concentration cannot be controlled

Which corrode the metal only

Phosphorus is very useful in the growth of:

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leave

stem

seed

root

What are the conditions under which the relation between volume (V) and number of moles (n) of gas is plotted? (Pressure; T-temperature)

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constant P and T

constant P and V

constant T and V

constant n and v

SO2 and NO2 cause pollution due to increase in:

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buffer action

basicity

acidity

neutrality

Which of the following least resemble an ideal gas?

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ammonia

helium

hydrogen

trichloromethane

The molar volume of CO₂ is maximum at:

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S.T.P. (0^∘C and 1 atm)

127^∘C and 1 atm

0^∘C and 2 atm

273^∘C 2atm

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of these

Fe can displace Cu form CuSO4solution because

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Fe is ferromagnetic

Fe is below Cu in electrochemical series

Fe is above Cu in electrochemical series

Fe exists in divalent oxidation state

What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

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low ionization energy of sodium

sublimation of metallic sodium to give yellow vapour

emission of excess energy absorbed as a radiation in the visible region as a radiation in the visible region

photosenitivity

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

The amount of heat evolved or absorbed in a process in the same whether the process takes place in one or several steps is the statement of

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First law of thermodynamics

Hess's law

Coulomb's law

Phase law

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

The oxides of electronegative elements are

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Basic

neutral

Acidic

Amphoteric

Ammonium nitrate fertilizers is not used for which crop?

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Cotton

Wheat

Sugar-cane

Paddy rice

The number of moles of CO2which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

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