Question # 1

The haviest metal is

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Iron

Lead

Osmium

Platinum

How many blocks are presnt in modern periodic table

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2

3

4

5

An Inorganic chemistry places one mle of PCl5 in container A and one mole of each Cl2 and PCl3 in container B. Both the containers were sealed and heated to the same temperture to reach the stte of equilibrium Guess about the composition of mixtures in both the containers.

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Both the containers wil have zero concentration of its reactants.

Both the containers wil hae the same composition of mixtures

Container A will have more concentraion of PCl3 than B.

Container A will have less concentraion of PCl3 than B.

How many lone pairs are present on nitogenin ammonia molecule.

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One

Two

Three

Four

Predict themain characteristics of the reactions of metals with acids.

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Metals are dissolved

Hydrogen gas is envolved

Metals are coverted into salts

All the above mentioned characteristics are true

A covalent bond formed by the mutual sharing of two pairs of electrons between bonded atoms is called.

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Signle covalent bond

Double covalent bond

Triple covalent bond

Polar covalent bond

Which compound formed when SO2 is dissolved in water

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H2SO3

SO3

H2SO

H2S2O7

Whcih subshells are present in L - shell?

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S and P

Only s -sub shell

Only p - sub shell

Sub shell

Which group of the periodic table has the tendency to gain electrons.

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Group -1

Group -17

Group-2

Group -18

Number of electrons that an be accomodated in f - subshell

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6

10

2

14

How many elements are prsent in each 2nd and 3rd period.

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2

32

18

8

The body reactions are catalized by.

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Amino acids

Lipids

Enzymes

Fatty acids

Alkynes are also called.

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Olefine

Ethene

Paraffins

Acetylenes

A dynamic equilibrium

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Reaction stops to proceed

Amounts of reactants and products are equal

Rate of forward and reverse reaction are equl

Reaction can no longer be reversed.

Which is present 85% in natural gas?

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Ethane

Propane

Methane

Butane

The freezing point of water is:

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10 ^oC

100^oC

0^oC

46^oC

The waste products driven out because of the combustion of fossil fuels.

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Primary pollutant

Secondary pollutant

Tertiary pollutant.

None of them

The process which convert vegetable oil into banaspati ghee called.

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Hydrogenation

Halogenation

a and b

None of these

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

At dynamic equilibrium state:

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Rate of forward reaction≠ Rate of reverse reaction

Rate of forward reaction > Rate of reverse reaction

Rate of forward reaction = Rate of reverse reaction

Rate of forward reaction < rate of reverse reaction

Human body uses carbohydrates in the form of

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Glucose

Maltose

Fructose

Galatose

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

Which one of the following molecules is paramagnetic.

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H2

He

N2

O2

Which statement is incorrect about order of reaction

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It cannot be determined experimentally

It is determined experimentally

Sum of exponents in rate equation

It can have fraction value

Chromatography in which the stationary phase is a solid is classified as.

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Partition chromatography

Gas chromatography

Adsorption Chromatography

Thin layer chromatography

The total number of protons and neutrons present in the nucleus of an atom is called.

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Mass number

Atomic number

Molecular mass

Relative atomic mass

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

In discharge tube, properties of X-rays depend upon the nature of.

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Residual gas

Cathode plate

Anode plate

All of these

The quantitative relationship between rate and concentration is given by.

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Law of mass action

Rate law

Both of these

Le Chatelier's principle

Which element has highest ionization potential

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Li

Na

K

Rb

Rutherford's model fo atom failed because

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The atom did not have a nucleus and electrons.

It did not account for the attraction between protons and neutrons.

It did not account for the stability of the atom

Their is actually no space between the nucleus and the electrons.

If uncertainty in position of electron is zero, the uncertainty in its momentum would be.

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zero

Less than zero

Infinite

One

In which compound, the oxidation state of boron in not +3

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

Bone ash contain calcium phosphate

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40%

50%

70%

80%

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

Micronutrients are required in quantity ranging from

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4g-40g

6g-200g

6kg-200kg

4kg-40kg

Which one of the following polymers has no peptide linkage in it.

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Terlene

Nylon -6,6

Protein

None of these

Effect of substituent on benzene ring is due to

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Resonance

Inductive effect

Both a and b

Neither a nor b

Organic compound having fruity smell are

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Caboxylic acid

Alcohols

Ethers

Esters

Which are correct oxidation states for lead

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+1, +2

+3 , +5

+2 ,+4

+4 only

Ethyl alcohol on reacting with orthoboric acid form

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Ethyl borate

Boric acid

Boron acetate

Borax

Hydrogen resembles in properties with

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IA, IV A and VII A elements

III A, IV A and V A elements

II A, IV A and VI A elements

II A, III A and VII A elements

Which one of the following substances have garlic odour and a colourless gas.

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CH3OH

HCOOH

CH2=CH2

HC= CH