Question # 1

Phosphorus is very useful in the growth of:

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leave

stem

seed

root

Which of the following is a reason why real gases do not behave as ideal gases do?

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real gases have intermolecular forces between the molecules

real gases do not have intermolecular forces between the molecules

real gases exist as molecules

molecules of real gases attract each other more strongly than molecules of ideal gases

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

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Biochemistry

Physically chemistry

Pharmaceutical chemistry

Environmental chemistry

The development of industries was a direct result of which major factor

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population

living standards

depletion of resources

all of these

Compared with alkaline earth metals, the alkali metals exhibit.

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lower ionization energies

greater hardness

high boiling point

smaller ionic radii

Chose a point which is not included in the components of environment

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Stratosphere

Hydrosphere

Lithosphere

Biosphere

Which one of the following element is not present in all proteins?

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carbon

hydrogen

nitrogen

sulphur

Which of the following gases have maximum root mean square velocity at 25°C:

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SO₂

NH₃

CO₂

H₂S

Starch is a polymer of

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Sucrose

Fructose

α-D-Glucose

Lactose

All the Hydrolytic reactions are

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First order

Second order

Third order

pseudo-first order

If internal energy of the system is increased

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Change in state of the system may occur

Temperature of the system may rise

Chemical reaction may take place

All of these

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The heat released is enthalpy of neutralization

The heat released is enthalpy of atomization

The heat released is enthalpy of sublimation

The heat released is enthalpy of formation

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

Misch mental is

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An alloy of Aluminium

A mixture of chromium and lead chromate

An alloy of lanthanoid metals

An alloy of copper

1.1 mol of A is mixed with 2.2 mol of B and the mixture is kept in on litre flask till the equilibrium is reached. At equilibrium, 0.2 mol of C is formed. If the equilibrium reaction is A+2B 2C+D, the value of equilibrium constant is

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0.002

0.004

0.001

0.003

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

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These have very high positive values of reduction potentials

These have very high negative values of reduction potentials

Their ionization potentials are lowest

Their reduction potentials are close to SHE

Which is a component of micro nutrient?

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N

Zn

P

K

Photons of yellow colour are ______ energetic than violet colour

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More

Less

Equal

None

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

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Na metal

F₂gas

Al metal

O₂gas

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

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Na and K

Na and Hg

Hg and Zn

Cu and Te

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

As it passes into food chain, the concentration of DDT

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Remains same

Decreases

Increases

Unpredictable

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