Question # 1

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Acohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

Which one of the following will behave least like an ideal gas at high temperature and low pressure?

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hydrogen fluoride

helium

oxygen

carbon dioxide

What element is not essential for the growth of plants and not required in the fertilizers?

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nitrogen

potassium

phosphorus

barium

The bonding which occurs among polar covalent molecules containing H and one of the small electronegative element such as O, F or N is called

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bridge bonding

metallic bonding

hydrogen bonding

Ionic bonding

The pH range of the acid rain is:

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6.5 __ 6

Less than 5

8 __ 7.5

7 __ 6.5

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

Which of these polymers is a synthetic polymer?

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animal fat

starch

cellulose

polyester

Mostly ionic compounds are produced between elements of group

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IA and IIA

IB and VIB

IA. IIA and VII-A

IA and IB

The temperature at which volume of ideal gas is hypothetically zero is called

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Absolute zero

0°C

OK

Both a and c

A protein rich in proline and hydroxy proline is

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Globin

Collagen

Casein

Histone

A substance which increases the rate of a reaction without being consumed during the reaction is called

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An autocatalyst

A catalyst

A negative catalyst

All of these

The order of distance between the various Bohr orbits is

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r₂- r₁> r₃- r₂> r₄- r₃> ......

r₁> r₂> r₂- r₃> r₄-r₃> .....

r₂-r₁= r₃- r₂= r₄- r₃> .....

r₂- r₁> r₃- r₂< r₄- r₃< ....

The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?

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Bond length in NO⁺is greater than in NO

Bond length in unpredictable

Bond length in NO⁺is equal to that in NO

Bond length in NO is greater than in NO⁺

Sodium metal is obtained by the electrolysis of fused NaCl in cell is called

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Nelson's cell

Down's cell

Daniell cell

Voltaic cell

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

Which of the following is a carbonate are?

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Pyrolusite

Malchite

Diaspore

cassiterite

Grignard reagent is reactive due to :

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of them

Which one of the following is a water soluble vitamin

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Niacin

Riboflavin

Tyrosine

Ascorbic acid

If the radius of first Bohr orbit be a_o, then the radius of third Bohr orbit would be

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3 x a_o

6 x a_o

9 x a_o

1/2 x a_o

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

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Kolbe's reaction

Perkin's reaction

Sandmeyer's reaction

Schotten Baumann reaction

The value of SHE is cathode and anode is always taken to be

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One

Zero

Different

Same

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