Question # 1

The no. of electrons in the valence shell of noble gases are

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2

4

8

2 or 8

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

Which one of the following will not react with dilute HCI?

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Sodium

Potassium

Calcium

Carbon

The colour of calcium metal flame is

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Golden yellow

Brilliant white

Brick red

Light green

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

Bronze (alloy) is a ____________

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Slolution

Mixture

a & b

Nil

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

____________ is prevented by Metallic coating.

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NaCl

Rust

All

None of these

Fog is an example of ____________ in gas.

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Solid

Liquid

Gas

Plasma

_________ which occupies space and have mass.

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Matter

Atom

Molecule

All of above

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

In forth flotation process the ore particles are preferentially wetted by:

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water

oil

benzene

petrole

The % age of carbon in coke is

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60

70

90

98

__________ acid cause acidity of stomach.

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Oxalic acid

Hydrochloric acid

Sulphuric acid

Nitric Acid

The number of carbon atoms present in gasoline or petrol.

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5-10

6-10

7-10

8-10

Pentahydroxy ketone is called as:

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Glucose

Fructose

Starch

Sucross

When glucose and fructose combine and forms.

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Starch

Cellulose

Sucrose

None of these

Volatility of hydrocarbons deceases with:

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decrease of molecular mass

increase of molecular mass

increase of double or triple bonds

decrease of triple bonds

Potassium ferrocyanide salt is.

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Normal

complex

Basic

Acidic

Which one is Lewis Acid?

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BF₃

AICI₃

FeCl₃

All of these

The major components of Atmosphere are:

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Carbon and Nitrogen

Nitrogen and Oxygen

Oxygen and Chlorine

None of these

The distillation of liquid under reduced pressure is called.

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Destructive distillation

Vaccum distillation

Simple distillation

Fractional distillation

Both CH4 and NH3 are four electron pair system the angles of CH4 and NH3 are 109.5^o and 107.5 ^o respectively. This deviation is due to.

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Hydrogen bonding in ammonia

Lone pair attraction

Lone pair occupy more space and repel to other bond pairs

Lone pair lone pair repulsion

The value of Rydberg constant is.

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1.6 x 10⁷ m-1

1.9768 x 10⁷ m-1

1.09678 x 10⁷ m-1

1.7904 x 10⁷ m-1

The Number of moles of CO2 which contain 8.0 of oxygen.

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0.25

0.15

0.35

1.45

An ionic compound A⁺B^-is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron affinity of B are high

Both the ionization energy of A and electron affinity of B are low

Which of the following orbitals is not possible.

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3p

4s

2d

Is

The nature of bond in diamond is

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Electrovalent

Metallic

Coordinate covalent

Covalent

Which statement is true about Na and Na+

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size of Na is greater than Na+

Size of Na is smaller than Na+

Both have equal size

Both have same properties

27g of Al will react completely with how much mass of O2, to produce Al2O3.

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8 g of oxygen

16 g of oxygen

32 g of oxygen

24 g of oxygen

When liquid water changes to ice its volume expands. The expansion in volume is.

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5%

9%

10%

18%

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

Which one of the following acids acts as oxidizing agent but never a reducing agent.

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HCIO

HCIO2

HCIO3

HCIO4

Which substance is used in photography

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AgCl

AgBr

AgI

Ag3PO4

Nylon 6,6 is obtained by the reaction of hexamethylene diamine with

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Acetic acid

Adipic acid

Viny chloride

Acetyl chloride

Transition elements are those

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Which becomes before uranium

Which becomes after uranium

Which are prepared artificially

Which are in between s-block and p - block elements

Sulphuric acid acts as dehydrating agent in its reaction with.

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Sodium chloride

Potassium nitrate

Copper

Ethyl alcohol

The number of peptide bonds in dipeptide is

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0

1

2

3

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

Grignard's 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 the above

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

SN2 mechanism involves

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1st order kinetic

2nd order kinetic

3rd order kinetic

Zero order kinetic

The composition mixture of clay and lime stone in the raw material.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

55% lime stone and 15% clay