Question # 1

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

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Long form

Simplified

Simplest

Nil

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

_________ can be separated by physical means.

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Mixture

Compound

Solution

Nil

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

The no. of electrons in the valence shell of alkali metals is

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1

2

4

7

The value of Planck's constant is

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6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

.................... of an atom is not fixed.

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Size

Mass

Electronegativity

Nuclear char

Marsh gas is mostly consisted of.

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Butane

Propane

Ethane

Methane

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

The number of carbon atoms present in petroleum ether.

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1-5

2-5

3-7

5-7

According to the Lewis concept acid is a substance which can.

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Donate a proton

Donate a pair of electron

Accept a proton

Accept a pair of electron.

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

Which contains sufficient amount of metal?

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Mineral

Ores

Rocks

Soil

Mesosphere has a temperature range.

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17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

Thermosphere lies beyond.

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Stratosphere

Troposphere

Mesosphere

Biosphere

The acid which is called king of chemicals.

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Sulphuric Acid

Nitric Acid

Hydrochloric acid

Acetic acid

Which one of the following does not contain proteins.

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In pulses

In Potatoes

In fruits

In eggs

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

At constant temperature in a given mass of and ideal gas.

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The ratio of pressure and volume remains constant

Volume always remains constant

Pressure always remains constant

The product of pressure and volume remains constant

The volume of a gas at 0 oC is 273 dm3, the pressure remaining constant. At which temperature its volume will be doubled.

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273 K

273 ^oC

546 ^oC

316 K

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

In zero order reaction, the rate is independent of

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

London dispersion force are the only forces present among the.

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecule of solid iodine

Molecules of hydrogen chloride gas

For which system does the equilibrium constant K_chas units of (concentration)^-1

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Hund's rule state that when electrons enter to the same sub levels they are.

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Singly occupied with same spin

Doubly occupy with same spin

Singly occupied with different spin

Doubly occupied with different spin

Isotopes are the atoms of same element with similar chemical properties but different

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Atomic number

Atomic volume

Atomic weight

Atomic structure

The Avogadro constant is the number of.

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Atoms in 1 g of helium ga

Molecules in 35.5 g of chlorine gas

Atoms in 6 h graphite

Atoms in 24 g of magnesium

The born Haber cycle is the best application of law.

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Boyle's

Dalton's

Hess's

Graham's

Long chains of amino acids are coiled about one another into a spiral by

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Covalent bond

Ionic bond

Hydrogen bond

Van Der Waal's forces

Ethers show the phenomenon of

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Position Isomerism

Functional group isomerism

Metamerism

Chain isomerism

On heating aldehydes with Fehling's solution we get a precipitate whose colour is

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Pink

Black

Yellow

Brick red

Typical transition element is

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Sc

CO

Ra

Y

Acetic acid manufactured by

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Distillation

Fermentation

Ozonolysis

Esterification

Ozone depletion in stratosphere region is mainly due to the reaction of O3 with

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O2

SO2

CFCs

All of these

Cannizzaro's reaction is not given by

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Formaldehyde

Acetaldehyde

Benzaldehyde

Trithylacetaldehyde

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

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

Chlorine heptoxide reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Which one of the following compounds of lead is red in colour

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PbO

Pb2O

Pb3O4

PbCO3

Aromatic hydro carbon are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane