Question # 1

Metals are ________________

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Liquid

Solid

Gas

Malleable

Which has metallic bond?

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H

Na

HCI

P

Every system in the universe tends to lower its energy to attain ________________

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Freedom

Flow

Stability

Nil

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

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Bohr

Rutherford

Mendeleev's

Nil

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

It is a good reducing agent

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Fe

H

C

O

The metallic plates through which electrons enters and leaves electrolytes:

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Wires

Electrodes

Both

Nil

All chemists invented all except:

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Beakers

Spirit lamp

Funnels

Retorts

The lowest energy level is

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K

L

M

N

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

One H₂O molecule can form hydrogen bonding with how many other H₂O molecules?

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One

Two

Three

Four

_______ is the king of chemicals.

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Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

Petroleum fraction having composition C₅ to C₇ is.

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Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

The residual oil is heated above 400 c to produce.

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Lubricants

Paraffin wax

Asphalt

All

Which gas is used to prepare ammonia?

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N₂

O₂

Cl₂

S

Ozone is beneficial for us as it

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Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

Vitamin B₁ (Thiamin) was discovered by.

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Hopkins

Funk

J.Watson

Davy

Chemical formula of amino group is

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NH₃

NH₂

NH₄

COOH

What is the pOH of Ca(OH)2, 0.02 M Solution.

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1.698

1.397

12.31

12.61

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.

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

The comparative rates at which the solutes move in paper chromatography depend on.

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The size of paper used

Rf values of solutes

Temperature of the experiment

Size of the chromatographic tank used

If absolute temperature of 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

The molecules of CO₂in dry ice form the

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Ionic crystal

Covalent crystals

Molecular crystals

Any type of crystals

In given equation underlined element is. P+HNO3------------- H2PO4+NO+H2O

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Oxidized

Reduced

Neither oxidized nor reduced

Botha a and b

In endothermic reactions, the heat content of the.

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Products is more than that of reactants.

Reactants is more than that of products

Both a and b

Reactants and products are equal

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

Ionic solid are characterized by.

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Low melting point

Good conductivity in solid state

High vapours pressure

solubility in polar solvent

Which statement is correct about solubility product constant.

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It is applicable at highly soluble substances.

Value of Kap is independent of temperature

It is used for homogeneous aquarium system

It can be used to predict that precipitation will take place or not by combining two ions

The spreading of fragrance of a rose or scent in air is due to.

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Effusion

Diffusion

Osmosis

Evaporation

Solvent extraction method is particularly useful technique for separation when the product to be separated is

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Non-volatile or thermally unstable

Volatile or thermally unstable

Non-volatile or thermally stable

Volatile or unstable

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

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > I

Acetaldehyde can be prepared by the oxidation of.

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Acetic acid

Ethanol

1- Proponal

Ethanonic acid

Ammonium Nitrate fertilizer is not useful for

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Wheat

Cotton

Sugan cane

Paddyrice

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

Which one is not an argillaceous material.

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Clay

Shale

State

Gypsum

Which one is not electrophile

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BF3

SO3

AlCl3

NH3

The state of hybridization of "C" in ethane is

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SP

sp²

dsp²

sp³

The percentage of nitrogen in urea is.

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36%

46%

56%

65%

The main pollutant of leather tanneries in the waste water is due the salt of.

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Lead

Chromium (VI)

Copper

Chromium (III)

Which is simplest amino acid

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Alanine

Protein

Lysine

Glycine