Question # 1

Cholesterol is an important precursor in the biosynthesis of

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Sex harmonies

Adrenal hormones

Vitamin D

All of these

The type of hybridization in PCl3 is.

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dsp2

sp3

dsp3

d2sp3

Linear shape is associated with set of hybrid orbitals

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SP

sp²

dsp²

sp³

Geometrical isomerism in alkene is due to.

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C = C free rotation of bond

No C = C free rotation of bond

Presence of multiple bond only

Opticla rotation due to multiple bond

The colour of transition metal complexes

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d-d transitions of electrons

paramagnetic nature of transition elements

ionization

loss of s-electron

In group V-A elements the most electronegative elements is

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Sb

N

P

As

Ozone is mostly produced in

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Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

Tincal is a mineral of

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Al

C

Si

B

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

Which one of the following metal cannot evolve hydrogen from acetic acid.

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Sodium

Potassium

Magnesium

Zinc

Which property of triglycerides is used to determine its molecular mass.

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acid number

Saponification number

Iodine number

gold number

Whcih water will be considered as polluted water.

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High value of COD

Low value of COD

High value of DO

Low value of BOD

How much does of methanol can cause death

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10-15 ml

15-20 ml

100- 250 ml

has no effect

Synthetic rubber is made by polymerization of

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Vinylaecetate

Acetylene

Divinylacetylene

Chloroprene

Bleaching powder contains available chlorine approximately

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100%

70-80%

35-40%

10-20%

The Plastic which become soft and melt on heating and can be molded and remolded are called.

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Thermoplastic

Thermosetting plastic

Resin

Melamine

Which of the following element is not present in all proteins

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Carbon

hydrogen

Nitrogen

Sulphur

Group VI B of transition elements contains.

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Zn, Cd, Hg

Fe, Ru,Os

Cr, Mo, W

Mn, Te, Re

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