Question # 1

A binary solution consists of:

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One component

Two components

Three components

Many components

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

The molecular mass of water is

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16 amu

14 amu

18 amu

20 amu

Air is an example of:

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Gas in gas

Solid in gas

Liquid in gas

Gas in ;iquid

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

All metals are solid except

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AI

Mg

Na

Hg

Which one of the following does not affect the boiling point?

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intermolecular forces

external pressure

nature of liquid

initial temperature of liquid

Chemical formula of chloroform is :

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CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

Petroleum fraction having composition C₅ to C₇ is.

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Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

Vitamin are accessory Growth factors they play important role in our body like.

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Provide energy to the body.

Insulate our body from electric shock

Build brain cells

Regulate metabolism

Acids have taste

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Bitter

Seetish

Sour

Saltish

Monosaccharides are crystalline solids

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Grey

Crimson

Silver

White

Which one is the formula of chloromethane.

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CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

Half -Life for a given reaction is doubled if initial concentration is doubled. The order of reaction is.

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0

1

2

3

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

The number of bonds in oxygen molecules.

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One sigma and One pi

One sigma and two Pi

Three sigma only

Two sig and two pi

Chromatography in which the stationary phase is a solid is classified as.

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Partition chromatography

Gas chromatography

Adsorption Chromatography

Thin layer chromatography

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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

London dispersion forces are the only forces present among the

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecules of solid iodine

Molecules of hydrogen chloride gas

Observed pressure is less than ideal pressure for any gas due to

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Intermolecular forces

Size of molecules

Boiling point of molecules

Both a and c

Which of the following will have highest rate of diffusion

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O2

CO2

NH3

SO2

Critical temperature of CO2 gas is.

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31.1 ^oC

13.1 K

13.1 ^oC

1.31 ^oC

Diamond is bad conductor because.

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It has a tight structure

It has a high density

It is transparent to light

There are o free electros present in the crystal of diamond to conduct electricity.

Grignard reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C -Mg bond

None of the above

Which chemicals used for detection of amino acids.

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NaOH + I2

Phenyl hydrazine

Ninhydrin

Benedict's solution

Organic compound having fruity smell are

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Caboxylic acid

Alcohols

Ethers

Esters

The element of 2nd period, which has highest ionization energy from the following is

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Be

C

N

O

The most electronegative element of group V-A is

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N

P

Sb

Bi

Which of the following will have the highest boiling point.

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Methanal

Ethanal

Propanal

2-Hexanone

Predict the product or reaction.

Acetaldehyde +NaOH

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An aldol

Acetic acid

Ethanol

Paraldehyde

Which of the following is non-typical transition metal

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Fe

Mn

Zn

Ni

Which one of the following elements shows variable valency, can act as a catalyst and form coloured compounds.

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Carbon

Chlorine

Sulpur

Iron

Which catalyst is used Friedel Crafts reactions

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AlCl₃

BeCl₂

NaCl

HNO₃

Which compound show hydrogen bonding

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C₂H₆

C₂H₅Cl

CH₃OCH₃

C₂H₅OH