Question # 1

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

P1V1 = P2V2 is mathematical form of ____________ law.

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Bohr's

Charles

Boyle's

Nil

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

_________ can be separated by physical means.

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Mixture

Compound

Solution

Nil

Atoms are made of sub _________

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Atoms

Molecules

Charge

Atomic particles

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

The branch of chemistry which deals with inter conversion of electrical & chemical energy is:

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Biochemistry

Electrochemistry

Organic chemistry

None of these

Effusion is a property of:

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Gases

LIquids

Solids

Plasma

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

Number of protons+ neutrons is :

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Atomic mass

Mass numbers

Both

Nil

Bucky molecules have ________________ c-atoms.

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20-60

20-90

40-60

40-100

The color of hydrogen Iodide is:

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Colourless

Black

Red

Pink

Which help to keep the bowel functioning property

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Dietary fiber

Vitamins

Lipids

Carbohydrates

Fertilizers are used to make up the deficiency of;

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oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

Oxidation of alkenes forms:

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Glycol

Glyoxal

Formic acid

Oxalic acid

Molecular formula of stearic acid is.

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C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

How much amount of sunlight reaches up to earth and absorbed:

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26%

32%

50%

18%

Binary compounds of oxygen such as CO2 and SO2 were names as acids by;

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Jabir Bin Hayan

Lavoisier

Al- Jahiz

Sir Humphrey Davy

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

Chemical formula for urea is:

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NH4CNO

NH4CH

NH2CONH2

NH4CI

General formula of carbohydrate is.

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C_n(H₂O)₆

CH

C_nH_2n

C₆H_2nO

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

Molal boiling constant for water is 0.52 ^oC. If 6 g of urea is dissolved in 100 g of water, what will be its boiling point.

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100.52 ^oC

-100.52^oC

100^oC

99^oC

Solvent extraction is an equilibrium process and it is controlled by.

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

Which is not used as drying agent in a desiccator.

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Cacl2

NaCl

P2O5

Salica Gel

The order of the rate of diffusion of gases NH3, SO3, Cl2 and CO2 is.

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NH3>SO2>CL2>CO2

NH3>CO2>SI2>Cl2

Cl2>SO2>CO2>NH3

Which process is endothermic and spontaneous

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Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

Which one of the following aqueous solutions has the highest pH

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0.1 M NaOH

0.1 M HCl

0.2 M H2SO4

0.1 M HNO3

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

The over all positive value for the reaction potential predicts that process is energetically.

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Not feasible

Feasible

Impossible

No indication

Colligative properties are the properties of.

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Dilute solution which behave as nearly ideal solutions

Concentrated solutions which behave as nearly non ideal solutions

Both a and b

Neither a nor b

Which one of the following substances is used as decolouring agent

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Animal charcol

Concentrated H₂SO₄

CaCI₂

Silica gel

The unit of rate constant is the same as that of the rate of reaction is.

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

Which complex shows zero oxidation state of the transition metal.

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[Fe(CO)5]

K3[Fe(CN)6]

K2[Fe(CN)6]

[Cu(NH3)4]SO4

Which one of the following compounds is the isomer of ethyl alcohol.

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CH3OH

CH4OCH3

CH5-CH(OH)CH3

CH3OC2H5

Which compound will have the maximum repulsion with water

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C₆H₆

C₂H₅OH

C₃H₇OH

CH₃OCH₃

The thickness of ozone layer is.

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25 to 50 km

25 to 28 km

3 km only

1 km only

Which of the following statement is correct

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Na atom is smaller than Na⁺

Na atom is larger than K atom

F atom is smaller than F^-

F atom is larger than F^-

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

Methyl alcohol can be represented by all of the following words or symbols except.

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CH3OH

Wood spirit

Methanol

Grain alcohol

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

Which one does not belong to the alkaline earth metals

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Be

Ba

Ra

Rn

Which one is not property or uses of mustard gas

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Used in 1st world war

Powerful vesicant

High boiling liquid

High boiling gas

An aldehyde is reduced to alkane with hydrazine is the presence of

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KOH

NaOH

CaO and NaOH

Ca(OH)2