Question # 1

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

Benedict solution gives a positive test with

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Glucose

Fructose

Sucrose

Starch

All of the following are aliphatic amino acids except

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Glycine

Alanine

Proline

Lysine

In SO-²4 the oxidation number of sulphur is

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-8

-6

+8

+6

What water freezes at 0∘ , Its density decreases dues to:

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cubic structure of ice

empty spaces present in the structure

change of bond lengths

change of bond angles

The hetero atom in py ridine is

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Oxygen

Nitrogen

Chlorine

Sulphur

Benzene has pi electron

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2

4

6

8

There is more deviation in the behaviour of a gas from the ideal gas equation PV = nRT

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At high temperature and low pressure

At low temperature and high pressure

At high temperature and high pressure

At low temperature and low pressure

A protein rich in proline and hydroxy proline is

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Globin

Collagen

Casein

Histone

α and β Glucose differs in orientation of hydroxyl group around

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C₁

C₂

C₃

C₄

Which of the following contains maximum of number of molecules?

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100 cc of CO₂ at STP

150 cc of N₂at STP

50 cc of SO₂ at STP

200 cc of NH₃ at STP

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

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Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

Claisen reaction

Acid rain is due to increase in atmospheric concentration of

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Ozone and dust

CO₂and CO

SO₃and CO

SO₂and NO₂

Atmosphere thickness is (in km) around the earth:

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10 km

100 km

1000 km

1500 km

What is formed when oxalic acid is dehydrated by conc. H₂SO₄?

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C + CO₂

CO

CO₂

CO + CO₂

Which of the following is obtained by condensation polymerization?

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Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowvikov's rule

Pauli's exclusion principle

Auf ban principle

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

pH and pKa of the buffer are related by Henderson equation which is

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The limiting line of Blamer series in hydrogen spectrum lies in

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Visible regions

Ultraviolet region

Infrared region

x-rays region

The solubility of KCIO₃salt in water is decreased by adding

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NaCIO₃

NaCI

KCIO₄

KCI

The rate of E₁reaction depends upon

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The concentration of substrate

The concentration of nucleophile

THe concentration of substrate as well as nucleophile

None of the above

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