Question # 1

When we mvoe from top to bottom in a group atomic size.

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Decrease

Increases

First increases then decreases

None of the above

At what temperature , rate of ammonia formation and decomposition is the highest.

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200 ^oC

300^oC

400 ^oC

500 ^oC

Following are state of matter.

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Liquid

Solid

Gas

All of these

/which of the followign elements is presnt in group IA.

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Lithium

Hydrogen

Sodium

All of these

N-shell contains number of subshells.

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1

3

4

2

In an irreversibel reaction equiirbrium is.

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The forward reaction will be fovoured

No effect on forward or backward reaction

No effect on bakcwars reaction

The backward reaction will be favoured

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

Activation energy of a chemical reaction must be....... the everage kinetic energy of reacting molecules.

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Equal to

Grether than

Lower than

None of these

A substance whcih can behave as an acid as well as a base is called

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Amphoteric specie

Acid

Base

Neutral specie

How many moels of molecules are there in 16 g oxygen.

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0.05

0.1

0.5

1

If one mole of carbon contains x atoms what is the number of atoms contained in 12 g of Mg.

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1.5 x

0.5 x

x

2x

Gypsum in water is.

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Sparingly soluble

Insoluble

Highly soluble

None of them

The number of carbon atoms present in diesel oil.

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10-15

11-15

12-15

13-15

The functional group -COOH is found in.

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Aldehydes

Esters

Carboxylic acids

alcohols

Number of discovered element till today are.

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140

118

90

16

The depletion of which gas results in the death of aquatic life.

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Oxygen

Carbon di oxide

Boath of them

Nome of them

If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one.

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It will be saturated hydrocarbon

It will hav 8 hydrogen atoms

Its name will be n-butane.

It will be least reactive.

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Formic acid is present in

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String of bees

Sour milk

Apple

Fats

Which one of the following is not an air pollutants?

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Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded by H2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

If the electron in a hydrogen atom drops from n = 6 to n =4 level, the radiation emitted is in which series of lines in the spectrum of atomic hydrogen.

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Lyman

Balmer

Paschen

Brackett

If strip of Cu metal is placed in the solution of FeSO4

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolves

No reaction takes place

Which of the following can form H-bonds

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NH₃

C₂H₆

NaCI

CHCI₃

When an atom reacts chemically and loses one or more electrons it is.

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Decomposed

Reduced

Oxidized

Catalyzed

The paper at which separation of solute have been taken place is called.

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Retardation factor

Chromatogram

Base line

Solvent front

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

What are the SI of excluded volume 'b' in Vander waal equation.

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dm³ mol -1

m3 mol -1

mol dm-3

mol m-3

Which one of the following salts do not hydrolyses

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CuSO4

Na2CO3

NaCl

AlCl3

A molecular orbital can accommodate maximum electron

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2

6

8

10

Which of the following has linear structure.

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CO2

NH3

CH4

H2O

Which form interstitial compounds.

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Fe

Ni

CO

All of those

Mark the correct statement.

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Na+ is smaller than Na atom

Na+ is large than Na atom

Cl- is smaller than Cl atom

cl- and Cl are equal in size

The strength of binding energy of transition elements depends upon

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number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

For ----------------- Mechanism, the first step involved is the same

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E1 and E2

E2 and S_N2

S_N1 and S_N2

E1 and S_N1

Alcohol obtained by fermentation is only upto

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10%

12%

20%

95%

The aqueous solution of which substances is green in colour

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K2CrO4

K2CrO7

KMnO4

K2MnO4

Which one of the following has lowest first ionization energy.

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Li

Na

Rb

Cs

In ethene molecule how many carbon orbitals are equivalent and degenerate in nature.

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3

4

5

6

Chile saltpeter has the chemical formula

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NaNO3

KNO3

Na2B4O7

Na2CO3.H2O

Which compound is alicyclic in nature.

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Cyclobatane

Iso batane

n butane

Toluene

Phenol after reduction with hydrogen changes to

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Picric acid

Benzene

Cyclohexane

Cyclohexanol