Question # 1

Which is independent of temperature

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Molarity

Molality

Normality

Mole fraction

The shape of the molecule SF₂Cl₂is

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Trigonal bipyradmidal

Cubic

Octahedral

Tetrahedral

Gradation in properties in the periods of periodic tables are due to change in

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Atomic weight

The number of electrons

Number of protons

Electronic configuration

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

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Na

O

Cl

N

Which of the following is non-typical transition element?

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Cr

Mn

Zn

Fe

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

The percentage of methane in natural gas is

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50%

60%

85%

90%

The destructive distillation of coal gives three products. What is not the product of destructive distillation of coal

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Coal gas

Carbon dioxide

Coal tar

Coke

Which metal of Group-II A of the periodic Table, will form the least ionic chloride

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Be

Mg

Ca

Sr

The oxidation number of H is -1 in the compound

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H₂O

H₃BO₃

NaOH

NaH

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

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Proton donar

Dehydrating agent

Catalyst

Electrophile

The empirical formula of a compound is CH₂O. What may be the compound

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C₂H₅OH

C₆H₅OH

HCOOH

A pair of elements in the same family in the periodic classification is

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Cl and C

Ca and Al

N and Ne

Na and K

Phosphine is not obtained by the reaction when

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White P is heated with NaOH

Red P is heated with NaOH

Ca₂P₂reacts with water

PH₄l is boiled with water

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of

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Mineral acids

Mineral alkalies

Organics acids

Minerals acids & alkalies

The value of charge on electron is

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1.602 x 10^-19coulombs

1.602 x 10^-18coulombs

1.602 x 10^-17coulombs

1.602 x 10^-16coulombs

Which one of the followings is a heterocyclic compound

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Cyclohexanol

Phenol

Pyridine

Anthracene

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0 dm³

3 dm³

2 dm³

3 dm³

When chlorofluoro carbon are subjected to U.V. they form

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Cations

Anions

Free radicals

None of these

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

pH of 1 molar NaOH is

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7

zero

14

10

Which of the following is a member of -block

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Zn

Al

B

Br

For which system does the equilibrium constant. K_chas units of

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Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Which set of hybrid orbitals has planar triangle shape?

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sp³

sp

sp²

dsp²

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

Their e/m, ratio resembles with that of electrons

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Alpha rays

Beta rays

Gamma rays

X-rays

Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm^-3. The molarity of HCl solution is

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10.23 moles dm^-3

11.55 moles dm^-3

11.73 moles dm^-3

12.67 moles dm^-3

SN₂reactions can be best carried out with:

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Prl. alkyl halide

Sec. Alkyl halide

Ter. Alkyl halide

All of three

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