Question # 1

Transfer of electron between elements result in.

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Coordinate covalent bonding

Ionic bonding

Metallic bonding

Covallent bonding

Caustic chemical drain cleaner are captable of dissolving.

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Hair

Food

Grease

All of these

The crystals of whic substance has rhombic shape?

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Brass

Bronze

Sulphur

Grahite

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

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

How many electrons can be accommodated at the msot in the third shell of the elements.

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8

12

10

18

What conditon Should be met for the reversible reactio to achieve the state of equilibrium.

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The concentratio of all the reactants and the prodduct should become constant

all the reactants should be converted into the product

50% of the reactant shuld be converted into prodcuts.

One of the product should be removed from the reaction mixture.

When we mvoe form left to right in a period, atomic size.

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Increases

Decreases

First increases then decreased

None of the above

What mass of 95% CaCO3 will be requred to neutralize 50 cm 3 of 0.5 M HCl solution.

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9.5 g

1.45 g

1.32 g

1.25 g

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

What does keep the particles present in the nucleus intact.

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Particles are held together by dipolar force

Particles are held together by wee nuclear force

Particles are held together by strong nuclear force

Particles are held together by electrostatic force

Oxidation of Ethene with KMnO₄ produces.

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Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

Which one Ion is not present in salt.

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Metallic cation

Anion of Base

Anion of acid

None metallic anion

Ozone has a smell

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Bitter

Rotten egg

Sweat

None of them

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

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.

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Who was prepared acetic acid in laboratory?

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Berzelius

Wohler

Kolbe

Dalton

Which one of the following compounds is an aldehyde?

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CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Which of the following is a secondary pollutant.

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CO₂

CO

SO₃

HF

When water freezes at 0°C, its density decreases due to

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The azimuthal quantum number / = 2, then M(Magnetic quantum number) can have values as

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+1, -1

+1, 0, -1

+2, +1, 0,1, -1, 2

+3, +2, +1, 0, 1, -2, -3

Ascorbic acid is vitamin.

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A

B

C

D

Salt of weak acid with strong base when dissolved in water gives.

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Acidic solution

Basic solution

Neutral solution

None of above

Which of the following orbitals is not possible.

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3p

4s

2d

Is

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

Which is not example of natural plasma.

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Lightening bolt

Aurora

Neon sign

Sum

Repeated extraction using small portions of solvent are more.

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Accurate

efficient

Slow

Rapid

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

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Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

Which one of the following is not property of a good solvent.

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It should be inexpensive

It should dissolve impurities easily

It should dissolve large amount of solute at boiling point and less amount of solute at low temperature.

It should not react chemically with solute

Which of the following will have the same number of molecules at STP

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280 cm³of CO₂and 280 cm³of N₂O

11.2 dm³of O₂and 32 g of O₂

44 g of CO₂and 11.2 dm³of CO

28 g of N₂and 5.6 dm³of oxygen

Which hydride is intermediate in nature.

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NaH

BeH2

NH3

HCl

Which compound is the more reactive

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Benzene

Ethene

Ethane

Ethyne

Aluminium oxide is.

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Acidic oxide

Basic oxide

Amphoteric oxide

None of these

Which property of hydrogen not resemble to alkali metals.

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Electronic configuration

Oxidation state

Reaction with halogen

Metallic nature

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

Malonic acid is

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Aromatic monocarboxylic acid

Aromatic dicarboxylic acid

Aliphatic monocarboxylic acid

Aliphatic di carboxylic acid

The smog which have high contents of SO2 in it, is called.

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Reducing smog

Oxidizing smog

Natural smog

Neutral smog

The substance that retard the activity of enzyme is called.

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Co enzyme

Epo enzyme

Activity

Substrate

The number of acidic hydrogen present in 1- Propyne is

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1

2

3

4

Which one of halogens is a liquid

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F₂

Cl₂

Br₂

I₂

During the manufacturing process of cement the temperature of the decomposition zone goes up to.

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600 ^oC

900 ^oC

1000 ^oC

1200 ^oC