Question # 1

Amino acids are buildng blocks of:

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protein

Carbohydrates

Lipids

fats

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

In chromatography, the point at which solvent maximum rises called:

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Solvent front

Base line

Element

Chromatogram

Generally electron affinities for elements in a period from left to right

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Decreases

Increases

Remain same

Increases alternatively

Condensation of aldeydes withα-hydrogen gives:

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Acetal

Ketal

Aldol

Cannizzaro product

A compound is soluble in conc. H₂SO₄, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

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Primary alcohol

Tertiary alcohol

alkene

ether

Which of the following molecules have its central atom sp²hybridized

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CH₄

C₂H₂

C₂H₄

CCl₄

A transition element is defined as an element of 3d series

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Which is metal

Which has one stable ion

Which has two stable ions

Which has at least one stable ion with incomplete d-orbital

Methanol and ethanol can be distinguished by

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Iodoform test

Iucas test

Dichromate/H₂SO₄oxidation test

Flame test

Estimation of Na in sea water is an example of :

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Numerical analysis.

Qualitative analysis.

Quantitative analysis.

None of above.

Calcium carbide reacts with water to produce

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Acetylene

Methane

Ethylene

Ethane

Methanol is prepared from CO and H_{2 using catalyst:}

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ZnO

Cr₂O₃

Pt

Ni

Which of these always applies to a nucleophile

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It attacks a double bond

It has a lone pair of electrons

It is single atom

It is negatively charged

During redox reaction an oxidizing agent

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Gains electrons

Is oxidized

Loses electrons

Hydrolysed

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

When carbon dioxide is passed through the R - Mg - X is produced

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Any carboxylic acid

Propanoic acid

Propanedioic acid

None of these

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Which element belong to 5d series

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V

Nb

Pd

Hf

Which of the following is not a hydrocarbon

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Butane

Methyl benezene

Acetylene

Glucose

The divisibility of atom was shown by

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Stoney

J.J. Thomson

Millikan

Rutherford

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

The film forming components of paints are

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Resins

Thinners

Pigments

Driers

Half life period of N₂O₅is 24 minutes and it remains same where we increase or decrease its initial concentration, then reactions

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Zero order

First order

Second order

Third order

The voltaic or galvanic cells which cannot be recharged are called

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Primary cells

Secondary cells

Infinite cells

Fuel cells

Which one of the following gases is used for artificial ripening of fruits

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Ethane

Ethyne

Methane

Propane

The heat of formation of graphite and P(white) is ______ KJ/mole

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0.00

-273.0

+8.7

813.99

Which of the following will not give iodoform test?

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Ethanol

Ethanal

Isopropyl alcohol

Benzyl alcohol

Which of the following is commonly called polyamide

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Nylon

Rayon

Terylene

Oridon

The orbitals having n + l = 5 are

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2p, 3d,3s

3p, 3d, 5s

3s, 4p, 4d

5s, 4p, 3d

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