Question # 1

The SI unit of pressure is:

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N

N/m²

Pascal

atm

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

H° + H° are ________________ in energy.

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Lower

Higher

Medium

Nil

____________ used to remove nail polish.

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Acetyline

Acetone

H2O

Nil

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

In ionic bond complete ________________ of electrons occurs.

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Paring

Sharing

Transfer

None

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

Halogens with metals for

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Ionic bond

Covalent bond

Dative covalent bond

Metallic bond

Addition of OXYGEN is called.

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Reduction

Conduction

Oxidation

Nil

Which one is least reactive non-metal?

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P

C

CI

F

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

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Sodium metal

Zinc metal

Magnesium metal

Potassium metal

Blonde hair contains compounds of:

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molybdenum

iron

titanium

copper

Who put forward '' the vital force theory''?

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Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

Mesosphere has a temperature range.

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17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

Active mass is expressed as:

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{ }

[ ]

( )

l l

On which base atmosphere is divided into four regions?

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Change in pressure

Change in rediation

Change in temperature

Change in volume

Volatility of hydrocarbons deceases with:

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decrease of molecular mass

increase of molecular mass

increase of double or triple bonds

decrease of triple bonds

Potassium ferrocyanide salt is.

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Normal

complex

Basic

Acidic

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

The mass fo 1.505 x 10²³atoms of sulphur is.

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0.5 g

0.6 g

0.7 g

0.8 g

What type of bonding is present in NH4Cl

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Ionic

Covalent

Co ordinate covalent

All of these

Which of the following can form H-bonds

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NH₃

C₂H₆

NaCI

CHCI₃

That cell in which electrical energy is converted into chemical energy is called

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Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

10 g of NaOH has been dissolved per dm3 of solution. The molarity of solution is.

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0.5 M

0.25 M

1 M

2 M

The largest number of molecule are present.

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3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

A buffer solution can be prepared by mixing

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Weak acid and its salt with weak base

Weak base and its salt with strong acid

Strong acid and its salts with weak base

Strong base and its salt with weak acid

Cadmium has isotopes.

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3

4

5

9

In which of the following changes, nitrogen in reduced.

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NH3 to NO

NH3 to NO3

N2 to NH3

N-3 to N2

An azeotropic mixture of two liquids boils at lower temperature than either of them when.

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It is saturated

It shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

It is metastable

If 2 mol of an ideal gas at 546 K occupy a volume of 44.8 dm3, the pressure must be.

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1 atm

2 atm

3 atm

4 atm

Which halogen will react spontaneously with Au(s) to produce Au³⁺

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Br₂

F₂

I₂

Cl₂

During Nitration of Benzene the active nitrating agent is

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NO₃

NO₂⁺

NO₂

HNO₃

Element of which group are called non typical transition elements.

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IB

II B

II A

VII B

The reacts with halogen acids to form alkyl halide the process is known as.

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Halogenation

Hydrohalogenation

Hydrogenation

Dehydrohalogenation

Which substance is used to consulate rubber latex

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Ethyl alcohol

Acetaldehyde

Acetic acid

Water

Lactose has same molecular formula as

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Glucose

Fructose

Ribose

Maltose

Ecosystem is smaller units of.

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Lithosphere

Hydrosphere

Atmosphere

Biosphere

Which one of the following liberates CO2 from an aqueous solution of NaHCO3.

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Acetic acid

Ethyl alcohol

Phenol

Acetyl chloride

PCl3 reacts with water to form

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PH3

POCl3

H3PO4

H3PO5

Which halogen occurs naturally in a positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

As you proceed across a period in the periodic table the first ionization energy

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Decrease

Increase

Remains constant

First increase up the middle of period and then decreases