Question # 1

Which statement is not true. A solution is a homogeneous mixture of

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Two ionic substance like NaCl and HCl

Two molecular substances sugar and water

A solute and a solvent 1% NaHCO₃in water

NaCl and sand

The electronegativity of elements in a period from left to right

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Decreases

Increases

First decreases then increases

First increases then decreases

The metal with highest electrical resistance at room temperature is

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Pb

Te

Po

Fe

For spontaneity of a cell, which is correct?

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ΔG = 0,ΔE = 0

ΔG = -ve ,ΔE = 0

ΔG = +ve ,ΔE = 0

ΔG = -ve

The freezing mixture used in ice cream machine consists of ice and

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NaCI

KCI

MgCI₂

NaNO₃

The electropositive elements from

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Acidic oxides

Basic oxides

Neutral oxides

None

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

According to the SI-system heat contents are measured in units of

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Calorie

Joules

Ergs

Watts

The protection of steel by chrome plating is due to

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Cathodic protection

Anodic protection

Covering of steel surface

Formation of alloy with iron

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

How many moles of hydrogen atoms does 3.2 g of methane, CH₄, contain?

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0.02

0.2

0.4

0.8

Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with

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Any aromatic amine

Any primary amine

Any amine

Any aliphatic amine

The detection of functional group is called

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Numerical analysis

Qualitative analysis

Combustion analysis

Quantitative analysis

Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25

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3.0 BM

4.9 BM

5.9 BM

6.9 BM

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be

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Primary

Secondary

Territory

Aromatic

Which of the following is correct?

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Reduction of any aldehyde gives secondary alcohol

Reaction of vegetable oil with H₂SO₄gives glycerine

Alcoholic iodine with NaOH gives iodoform

Sucrose on reaction with NaCl gives invert sugar

Heaviest particle is

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Meson

Neutron

Proton

Electron

The quantum number which describe the orientation of the orbitals is

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Spin quantum number

Principle quantum number

Azimathal quantum number

Magnetic quantum number

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

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2

1

3

4

Which have better penetrating power

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Alpha rays

Beta rays

Gamma rays

X-rays

Which of the following represents elements in order of increasing atomic size?

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I, Br, Cl

Na, Mg, C

C, N, O

Li, Na, K

The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

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Isomerization

polymerization

Hybridization

Resonance

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

The filtration process is used to to separate solid from :

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Liquid.

Gas.

Solid.

All of above.

Which one is a polymer compound?

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SO₂

CO₂

CH₄

PVC

Which of the following species has the highest ionization potential?

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Ne

Al⁺

Mg⁺

Li⁺

A reaction in which heat is given out is

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An endothermic reaction

An exothermic reaction

A thermochemical reaction

An energetic reaction

Quantum number value for 2p orbitals are:

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n=2 ,l=1

n=1 ,l=2

n= ,l=0

n=2 ,l=0

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

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