Question # 1

The layer of earth around the earth is called:

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Atmosphere

Hydrosphere

Lithosphere

Biosphere

A pressure of 1Nm^-2 is equal to:

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one bar

one pascal

stalagmometer

one aomosphere

All of the following have cleavage planes except:

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molecular crystals

metallic crystals

covanent crystals

ionic crystals

Ether show the phenomenon of

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Positional isomerism

Functional group isomeris

Meta merism

Cis trans isomerism

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

Which of the following formula is correct for density of any gas

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d = RT/PM

d = PM/RT

d = MT/PR

d = RM/PT

Water is essential for life on

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Moon

Space

Earth

Sun

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:

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Eyes

Ears

Stomach

Nose

Which of the following equations represents the 2nd ionization energy of Na?

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Na(g) ---> Na²⁺ (g) + 2e^-

Na(s) ---> Na²⁺ (g) + 2e^-

Na⁺(s) ---> Na²⁺ (g) + e^-

Na⁺(g) ---> Na²⁺ (g) + e^-

The reference electrode is made by using

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ZnCl₂

CuSO₄

HgCl₂

Hg₂Cl₂

Which three elements are needed for the healthy growth of plants?

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N,S,P

N,Ca, P

N,P,K

N,K,C

General formula of aromatic carboxyl acids

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R---------------OH

RCOOH

RCOR

ARCOOH

Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch

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Diastase

Maltase

Zymase

Invertase

A 4f orbital has

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one node

two node

three node

four nodes

The reagent which forms crystalline osazone derivative when treated with glucose is

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Fehling solution

Phenyl hydrazine

Benedict solution

Hydroxyl amine

When we perform the same reaction by taking two different initial concentrations of a reactant for a second order reaction then

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Reaction becomes exothermic

Energy of activation is different

Mechanism of reaction is changed

Half life period is changed

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

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Saturated

Un-saturated

Magnetic

Para-magnetic

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

Natural fertilizers are materials derived from

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Plants only

Animals only

Both plants and animals

None of these

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

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