Question # 1

The reaction rate is expressed in the units of

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Mol dm^-3S^-

Mol dm^-3

Mol dm^-3N^-

dm^-3S^-

Indicate the correct statement

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All lanthanidees are present in the same group

All halogens are present in the same period

All the alkali metals are present in the same group

All the noble gases are present int he same period

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Substances that tend to decrease the activity of enzymes are called

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Coenzyme

Activators

Inhibitors

Apoenzyme

Nitration of phenol gives

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o-nitrophenol

p-nitrophenol

m-nitrophenol

Both o and p-nitrophenol

The bond order for He₂molecule is

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zero

1/2

1

2

______ are called biocatalysts

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Organic acids

Organic bases

Enzymes

All

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

Which of the following in incorrect?

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FelCl₃is used in the detection of phenols

Fehling solution is used in the detection of glucose

Tollen's reagent is used in detection of unsaturation

NaHSO₃is used in the detection of carbonyl compounds

Which one of the following substance is use as decolonizing agent

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Asbestos

Animal charcoal

conc, H₂SO₄

Silica gel

The ore CaSO₄2H₂O has the general name

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Gypsum

Dolomite

Calcite

Epsom salt

Which of the following is a characteristic of a reversible reaction?

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It never proceeds to completion

It can be influenced by a catalyst

It proceeds only in the forward direction

Number of moles of reactants and products are equal

In KO₂the oxidation state of oxygen is

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-2

-1

+1/2

-1/2

Which of the following is an inert gas?

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H₂

O₂

N₂

Argon

From ₃₉Y to ₄₈Cd are called

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Transition elements

Outer transition elements

Inner transition elements

2nd transition series

50 mL of 10 N H₂SO₄. 25mL of 12 N Hcl and 40 mL of 5N HNO₃are mixed and the volume of the mixture is made 100 mL by adding water. The normality of resulting will be

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1 N

2 N

3 N

9 N

Which is not the poplar reaction

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A set of compounds in which reactivity of halogen atom in the ascending order is

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Chlorobenzene, vinyl chloride, chloroethane

Chloroethane, chlorobenzene, vinyl chloride

Vinyl chloride,chlorobenzene chloroethane

Vinyl chloride, chloroethane,chlorobenzene

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

The increase in size of the anion is due to:

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Increase in electron-electron repulsion

Increase in valence shell electrons.

Decrease in valence shell electrons.

Both (a) and (b).

Elements combine together due to inherent tendency to stabilize themselves by:

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Losing electron.

Sharing electrons.

Gain in electrons.

All of above.

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

Which is not true about acetophenone?

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Reacts to form 2,4-dintrophenyl hydrazine

Reacts with Tollen's reagent to form silver mirror

Reacts with I₂/NaOH to form iodoform

On oxidation with alkaline KMnO₄followed by hydrolysis gives benzoic acid

Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm^-3. The molarity of HCl solution is

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10.23 moles dm^-3

11.55 moles dm^-3

11.73 moles dm^-3

12.67 moles dm^-3

Which reaction is too vigorous to control

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Chlorination

Bromination

Iodination

Fluorination

Size of an anion is increased as compared to its atom because of the

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Addition of new shell

Repulsion of electrons in the valence shell

Decrease in nuclear charge

Increase in the unclear charge

Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is

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What will be the weight of deposited silver on passing 965 coulombs of electricity in solution of AgNO₃?

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1.08 g

2.16 g

0.54 g

0.27 g

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

Micro-nutrients are required in quantity ranging from

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4g-40g

6g-200g

6Kg-200Kg

4Kg-40Kg

The unit of specific conductivity is

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Ohm cm^-1

Ohm cm^-2

Ohm^-1cm

Ohm^-1cm^-1

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