Question # 1

Which of the following reactions are usually slow?

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Neutralization of acids and bases

Displacement Reactions

Organic substitution reaction

Free radical reactions

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

Coenzymes are the species which increase the activity of enzymes. They are chemically:

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metal ions

none - metals

organic acids

organic bases

Enzymes are

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simple proteins

derived proteins

compound proteins

conjugated proteins

When water freezes at 0°C, its density decreases due to

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cubic structure of ice

empty spaces present in the structure of ice

change of bond lengths

change of bond angles

The structure of protein helps protein to

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be in proper shape

attach substrate

perform is function

All of these

Which sequence of step is correct for the manufacture of cement:

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Crushing, mixing, heating, grinding

Crushing, heating, mixing, grinding

Crushing, grinding, mixing, heating

Mixing, heating, grinding, crushing

Carboxylic acid is given name by replacing "a" of alkane by:

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"oic" acid

"one"

"al"

"ol"

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

Hydrogen diffuses six times faster than gas A.The molar mass gas of gas A is

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72

6

24

36

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

Which of the following alkyl halides is used as a mathylating agent

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CH₂H₅l

CH₃l

C₂H₅Pr

C₂H₅Cl

Which of the following is not charged particle

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Proton

Electron

Neutron

Hydrogen nucleus

In a group of periodic table, atomic radii is:

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Remains some.

Increases.

First decreases then increases.

Decreases.

Besides Zn and Cu , German silver contains the metal

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Sn

Ag

Ni

Mg

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

An organic acdi having molecular formula C₂H₄O₂is

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Formic acid

Acetic acid

Oxalic acid

Propionic acid

A polymer may be

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Linear

Branched

Cross linked

All of these

Soil remediation means

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To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

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

Which one of the followings is a heterocyclic compound

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Cyclohexanol

Phenol

Pyridine

Anthracene

The value of Plank's constant 'h' is

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6.625 x 10^-34

6.625 x 10^-34J sec

6.625 x 10^-34KJ

6.625 x 10^-34K Cal

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