Question # 1

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

Group runs from ________________

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Top to bottom

Left to right

Top to right

Bottom to left

In 9th century scientist accepted by:

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Dalton

Bohars

Rutherford

Nil

Non-metals are generally soft, but which one of the following is extremely hard?

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Graphite

Phosphorus

Iodine

Diamond

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

Which pair of compounds is soluble?

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Ether and water

KCI and water

Benzene and water

Petrol and water

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

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

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Bohr

Rutherford

Mendeleev's

Nil

Mercury poisoning cause:

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neurological damage

high blood pressure

kidney damage

gastro

Which gas is used to destroy harmful bacteria in water?

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Iodine

Chlorine

Flourine

Bromine

According to Arrhenius concept acid is a substance which dissociates in aqueous solution to give.

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Hydrogen ions

Hydroxide ions

Both a and b

None of these

Who was prepared acetic acid in laboratory?

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Berzelius

Wohler

Kolbe

Dalton

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

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C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

Froth flotation process is used to concentrate.

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Copper ore

Iron ore

Chromium ore

Aluminum ore

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

The heat capacity of water is greater than rocks.

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4 times

5 times

6 times

7 times

Word "acid" derived from:

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Urdu

English

Latin

Greek

Catalytic converters convert.

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CO to CO₂

N₂ to NO

CO₂ to CO

N₂to NO₂

Alkenes are produced in large amounts by cracking of.

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Natural gas

Petroleum

Benzene

xylol

Maximum number of electrons in f-subshell is.

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2

6

10

14

Haemoglobin is a Macro molecule and consists of approximately atoms.

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5000

10,000

68000

15000

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

Ionic bond is formed by combination of groups

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IA and VIII

II A and VII A

IV A and VA

VIA and VII A

The components of which mixture can be separated by sublimation.

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NaCl and Ca cl2

Is and water

Sand and Naphthalene

Blue and red inks

A solution have H+ ions concentration 1 x 10^-7 , its pH will

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Acidic

Basic

Neutral

Zero

the rate of reaction when concentration of reactants are taken unity is called.

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Average rate

Instantaneous rate

Specific rate

Rate equation

Bromine has isotopes

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2

4

8

6

The rate of diffusion of a gas of molar mass 72 as compared to H2 will be.

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1/6 times

1.4 times

6 times

same

Acetone and chloroform are soluble in each other due to.

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Intermolecular hydrogen bonding

Dipole dipole interaction

Instantaneous dipoles

All of the above

A molecule has two ions pairs and two bond pairs around the central atom. The shape of molecule is.

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Linear

Pyramidal

Angular

Tetrahedral

which one of the general formula of alkene

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CnH2n

Cn2n+2

CnH2n-2

CnH2n+1

Which one of the following gases is used for artificial ripening of fruits.

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Ethene

Ethyne

Methane

Propane

In Down's cell anode is made up of.

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Iron

Copper

Graphite

Platinum

Which one is perchloric acid

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HClO

HClO₃

HClO₄

Which substance is used for silvering of mirror.

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Acetaldehyde

Ethanol

Ethylene glycol

Acetone

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

d -block elements which show anomalous configuration in first series are

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Cr and Ni

Cr and Cu

Cu and CO

Fe and Ni

Which catalyst is used Friedel Crafts reactions

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AlCl₃

BeCl₂

NaCl

HNO₃

The conversion of ethene to ethanol is an example of.

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Hydration

Dehydration

Neutralization

Esterification

Which element burns in nitrogen atmosphere to form nitride.

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Mg

Al

Both a and b

None of these

Which one of the following complexes is chelate.

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Potassium hexacyanoferrate (II)

Diammine silver (I) Chloride

Tetracarbonylnikel (0)

Sodium dioxalatoplatinate (II)