Question # 1

Alkenes normally have ______ geometry

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Tetrachedral

Linear

Planer

None

Acetic acid is miscible in:

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Water

Alcohol

Either

All of these

A species having positive or negative charge is called:

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Electron

Ion

Proton

Atom

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Electronphilic substitution

Electrophilic addition

Free radical substitution

Nuclephilic substitution

The bond order O₂molecule is

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1

2

3

Zero

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

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Increases

Decreases

Reaming same

Orbits coincide

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

Charge to mass ratio (e/m) of the electron is determined by

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R. A. Millikan

J. J. Thompson

G. J, Stoney

None of these

Which substances haveΔH =ΔE

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Solids

Liquids

Gases

Liquids and solids

Optical rotation method is sued when

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Reaction involve ions

Change of refractive indices

Reactions involving change of optical activity

None of the above

The amount of products obtained from the balanced chemical equation is regarded as

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Theoretical yield

Actual yield

% yield

Experimental yield

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

When a colourless gas is passed through bromine water only decolourisation takes place the gas is

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SO₂

HBR

HCl

H₂S

Which statement is correct for the fuel cells

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These cells operate at low temperature

No catalyst used for the formation of water

MnO₂is used as electrolyte

In a compound an atom has negative oxidation state because

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Atom is negatively charged

Atom acts as cathode

Atom is more electronegative

Atom has lowest ionization energy

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

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5

6

7

8

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

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H₂SO₄

CuSO₄

ZnSO₄

Na₂SO₄

When fused PbBr₂is electrolyed then

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Bromine appears at cathode

Lead deposited at the cathode

Lead appears at the anode

None of these happens

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

What element is not essential the growth of plants and is not required in the fertilizers

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Nitrogen

Potassium

Phosphorus

Barium

The unit of rate constant K ismole^-1 dm³for a chemical reaction, the order of reaction is :

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Order of reaction can determined by an experiment

Order of reaction can determined from a balance equation only.

Order of reaction can determined increases by increasing temperate.

Order of reaction must be in whole number and not in fraction.

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

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Lowering in b.pt

Reducing viscosity

Reducing specific heat

Lowering in freezing pt

B-atom in BF₃has

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sp³hybridization

sp²hybridization

sp hybridization

no hybridization

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm, atomic weight

One gm, Equivalent

Eletrochemical equivalent

None of the above

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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C₃H₃O

C₆H₆O₂

C₉H₉O₃

C₃H₆O₂

The limiting line of Blamer series in hydrogen spectrum lies in

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Visible regions

Ultraviolet region

Infrared region

x-rays region

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

Which of the following statements is correct?

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Phenol is less acidic than ethyl alcohol

Phenol is more acidic than ethanol

Phenol is more acidic than carbonic acid

Phenol is more acidic than CH₃COOH

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