Question # 1

State of hybridization of carbon in the carbocation is

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sp3

sp

sp2

dsp2

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

According to Avogadros law 1 mole of gas at S.T.P has a volume of

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22.4 dm³

24 dm³

24000 cm³

2m³

The stoichiometric calculations for a chemical reaction results in

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Actual yield

Percentage yield

Theoretical yield

Selectivity

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

CuSO₄5H₂O crystals belong to

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triclinic

cubic

tetragonal

orthorhombic

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Many petroleum products are:

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coloured

colourless

testy

poisoinous

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 day

6 day

5 day

7 day

Which one of the following will react with bothethand and ethanoic acid at room temperature

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CaCO3

CuO

Na-metal

CH3OH

Suspended matter is settled in purification of water by:

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aeration

coagulation

chlorination

treatment

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

The value of R(General Gas Constant) is

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8.3134 JK^-1mole^-1

1.987 Cal K^-1Mole^-1

Both a and b

1.987 JK^-1mole^-1

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

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Reduction potential of Cu⁺² is smaller than H⁺ions whenit is coupled with copper electrode.

gas is passed in it at 1 atm pressure.

Its oxidation potential and reduction potential is zero.

It is made of platinum wire dipped in HCl solution

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

Carboxylic acids are reduced to in presence of NaAIH₄

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Esters

Acetyl chloride

alcohol

Aldehydes

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Which of the following elements does not show variable oxidation states?

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Copper

Iron

Zinc

Titanium

The basic difference between synthetic and natural fertilizer is in their

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Rae material

Crop application

Usage

Shapes

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

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