Question # 1

A bond formed between two non-metals is expected to be:

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covalent

ionic

coordinate covalent

metallic

The atomic number of potassium is:

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11

15

18

19

Molarity is the number of moles of solute dissolved in:

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1 kg of solution

100 g of slovent

Idm³ of solvent

I dm³ of solution

____________ Is drawn in wires.

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Gold

Silver

Helium

Nil

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

Transition temperature of sulphur is ____________

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95.6

95

95.5

96

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

The number of proton in an atom is called _________ number.

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Molecule

Formula

Atomic

Molar

The boiling point of H2O is:

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100

12

1.105

9

The types of solutions on the basis of their physical states are

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3

6

9

12

Carbonization process is the conversion of

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Coal into coal gas

Coal into wood

Wood into coal

Wood into coal tar

The accumulation of which vitamin causes bone like deposits in the kidney.

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Vitamin D

Vitamin E

Vitamin B

Vitamin A

Vitamin are accessory Growth factors they play important role in our body like.

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Provide energy to the body.

Insulate our body from electric shock

Build brain cells

Regulate metabolism

The heat capacity of water is.

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4.2 Jg^-1 K^-1

2.1 Jg^-1K^-1

3.2 Jg^-1K^-1

5.9 Jg^-1K^-1

Earth has natural systems.

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One

Two

Three

Four

The region of ozone decomposition in stratosphere is.

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20 km

30 km

40 km

50 km

Matte is a mixture of:

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FeS and CuS

Cu₂O and FeO

Cu₂S and FeS

CuS and FeO

Dehydrohalogenation of vicinal-dihalides take place in the presence of.

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NaOH

KOH

NaCl

None of these

General formula of alcohols is:

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RCHO

ROH

O= R - C -OH

O = R - C- R

Which salt is used for the manufacture of detergents, pulp and paper?

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NaCl

Na₂CO₃

Na₂SiO₃

NaCl

The colour of litmus in a strong basic solution become.

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Yellow

Blue

Red

Colourless

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 boiling point of water at Murree Hills.

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90^oC

98^oC

100^oC

120^oC

Quantum number value for 2p sub shell are

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n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

The mathematical relation between the rate of reaction and the concentrations of the reactants is known as the

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Rate equation

Rate law

Arrhenius equation

Both a and b

To achieve a good separation, the two liquids are gently shaken to increase their area of.

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Miscibility

Separation

contact

Solubility

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

During combustion analysis, CO2 produced is absorbed in

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Mg (CLO4)2

50% KOH

CaCl2

P2O5

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

In which de excitation of electron of hydrogen atom maximum energy is relaeased.

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From n2 to n1

From n3 to n2

From na to n1

From na to n2

When ethyl alcohol is heated with conc. H2SO4 it produces ethene. The temperature required is as proximately

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100 ^oC

78 ^oC

Above 200 ^oC

140- 170 ^oC

Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Usually the percentage of moisture is paper is

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1- 3%

4-6%

6-8%

5%

Benzene molecule is made up of.

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3- pi and 9 sigma bonds

6- pi and 6 sigma bonds

6 -pi and 12 sigma bonds

4 -pi and 12 sigma bonds

Ethyl alcohol on reacting with orthoboric acid form

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Ethyl borate

Boric acid

Boron acetate

Borax

Which one of the following is the macronutrient for plants.

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Boron

Zinc

Calcium

Nitrogen

Which ether is symmetrical in nature.

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Methyl ethyl ether

Diphenyl ether

Methyl n propyl other

Methoxy benzene

Which reagent will react with both aldehyde and ketones

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Grignard reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

Which metal is redered passive by HNO₃due to formation of a film of metal oxide over the metal

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Pt

Sn

CO

Mn

The nature of lysine amino acid is

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Acidic

Basic

Amphoteric

Natural

Across a period from left to right in the periodic table, the melting and boiling point.

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Decrease

Increase

Remain constant

First increase upto the middle of period and then decrease