Question # 1

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

Which is strongest oxidizing agent.

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Cholorine

Iodine

Fluorine

Bromine

Which of the following does not happpen, when a system is at equilibrium state.

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Reaction continues to occur in both the directions

Concentration of reactants and products stop changig

Forward and reverse reactions stop

Forward and reverse rates become equal

Which branch of chemistry is athe study elements and their compounds except for organic compounds?

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Physical Chemistry

Geochemisty

Organic chemistry

Inorganic chemistry

The new substance formed in a chemcial reaction is.

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Reverse

Reactant

Forward

Product

Which element is the most reactive element?

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Florine

Oxygen

Chlorine

Nitrogen

Whcih law is obeyed in chemicla calculations?

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Law of mass action

Law of conservationof mass

Law of definite proportion

Both a and b

Electron affinity of fluorine in kJmol-1 is

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-328

328

-330

-340

Which is deal with compositon, structure, properties, behavior and changes of matter and energy.

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Technology

Chemistry

Engineering

Science

Empirical formula of hydrogen peroxide.

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HO

CO

CHO

CH

Pressure is a significant property of.

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Gas

Solid

Liquid

None of these

Conversion of dead plants into coal by the action of bacteria and heat is called.

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Carbonization

Catenation

Hydrogenation

Cracking

Carbon content in coke is.

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80%

98%

70%

88%

Acid rain damages the building it is due to reaction on.

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Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxilat

Acute lead poisoning causes dysfunction of.

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Kidney

Liver

CNS

All of them

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

When bones are heated they give.

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Starch

Gelatin

Fats

Oils

Which one of the following ion does not cause hardness in water?

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Ca⁺²

Mg^-2

SO^-2

Na⁺

Halogenation of methane produces following valuable chemical compounds used as solvents except.

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Carbonterachloride

Chloroform

Carbon Black

Chloromethane

Which one of the diseases causes severe diarrhea and can be fatal?

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Jaundice

Dysentery

Cholera

Typhoid

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

What one of the following does not contain protein?

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Pulses

Potatoes

Beans

Eggs

In azeotropic mixture showing positive deviation from Raoult's law, the volume of the mixture is.

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slightly more than the total volume of the components

Slightly less than the total volume of the component

Equal to the total volume of the components

None of these

Which of the following has coordinate covalent bond.

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NH4

NaCl

HCl

AlCl3

Which substance is nto a dehydrating agent.

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CaCl3

CdCl2

Silica gel

P2O5

In a solution 7.8 g of benzene and 46 g of toluene is present The mole fraction of benzene is.

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1/2

1/3

1/5

1/6

When water freezes, its volume increase.

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12%

9%

15%

18%

For a given process, the heat chagnes of constant pressure and at constant volume are related to each other as.

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qp= qv

qp<qv

qp>qv

None of these

The cathodic reaction in the electrolysis of dil H2SO4 with Pt electrodes is.

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Reduction

Oxidation

Both oxidation or reduction

Neither oxidation nor raduction

In which compound the oxidation number of Mw is +6

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KMnO4

K2MnO4

MnO2

MnO

The wave number of the light emitted by a certain source is 2 x 10⁶ m-1 . The wavelength of this light will be.

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500 nm

5000 nm

200 nm

5 x10⁷ m

Which of the following mixtures of liquids show negative deviation

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Methyl alcohol water

Hydrochloric acid water

Carbon di sulphide chloroform

Chlorobenzene bromobenzene

The ration of number of molecules of 2 g H2 g to number of molecules of 64 g gaseous oxygen is.

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1:1

1:2

1:32

1:4

Which form of phosphorus is more stable.

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White

Red

Black

Both a and b

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

An atom or group of atoms, which confers characteristic properties to organic compounds, are called.

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Isomerism

Metamerism

Ligands

Functional groups

Synthetic rubber is made by polymerization of

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Vinylaecetate

Acetylene

Divinylacetylene

Chloroprene

A single chloride free radical can destroy how many ozone molecules.

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100

100000

10000

10

Vegetable oils are

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Polyesters

Glycerides of unsaturated fatty acids

Essential oils

Fatty acids

Which statement is correct about the given reaction.

2NaOH + Cl2 --------------- NaCl + NaCIO + H2O

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Cl is oxidized and O is reduced

Cl is reduced and O is oxidized

Cl is oxidized as well as reduced

Neither Cl nor oxygen is reduced or oxidized

The product of fermentation of sucrose is

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Ethanol and H2O

Ethanol and CO

Ethanol and CO2

Glucose and CO2

Micronutrients for plant are those which

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Are required in very large amount

Are required in very small amount

Are produced from plants in very small amount

Retard the growth of plants

The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air.

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Gain water and remains solid

Gain water and becomes liquid

Lose mass and remain solid

Remain unchanged on heating.

Keeping in view size of atoms ,which order is the correct one.

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > I