Question # 1

Oceans cove ______ percent of the surface of the earth

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60

70

80

97

0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

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Volume

Mass is gram

Total number of atoms

Number of molecules

Aldehydes is distinguished from ketones by using

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Tollen's reagent

Benedict reagent

Fehling solution

All of the above

The experimental relationship between a reaction rate and the concentration of reactants is called

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Order or reaction

Rate law

Activated complex

Molecularity

Acyl halide is formed by reacting PCl₅with

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Alcohol

Ester

Amide

Both carboxylic acids as well as esters

Amiino acids are building blocks of:

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Protein

Carbohydrates

Lipids

Fats

The valency, ionization energy and electrongativity of elements are related to its

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Atomic number

Properties

Atomic weight

Family group

96500 C of electricity liberates from CuSO₄solution

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63.5 g of Cu

31.75 g of Cu

96500 g of Cu

100 g of Cu

Which one of the following reagents will distinguish between C₆H₅CHO and C₆H₅COCH₃

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Aqueous bromine

Phosphorus pentachloride

2, 4 DNPH

Tollen's reagent

Estimation of Na in sea water is an example of

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Numerical analysis

Qualitative analysis

Quantitative analysis

None of above

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

Monocarboxylic acids exist as dimer because of

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Dipole-dipole attraction

Hydrogen bonding

Van der Waals forces

Conhesive forces

The amount of heat evolved or absorbed in a process in the same whether the process takes place in one or several steps is the statement of

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First law of thermodynamics

Hess's law

Coulomb's law

Phase law

By applying Hess's law, we can calculate

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ΔH

ΔS

ΔF

K

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

Proteins and amino acid can be separated by:

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Filtration

^Sublimation

Chromatography

Suction

Which of the following salts mixed with ice to make the freezing mixture used in ice cream machine

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KNO₃

NH₄NO₃

AgNO₃

Mg(NO₃)₂

Ionic hydrides are generally

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Liquid at room temperature

Good electrical conductors

Good reducing agents

Easily reduced

Boiling point of n-butane is:

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-102°C

-75°C

-55°C

55°C

Which one is used as a fuel for internal combustion engines in many European countries and Brazil

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C₂H₅OH

CH₃OH

CH₃COOH

C₂H₂

During electrolysis, the reaction that takes place at cathode is :

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Reduction

Both (a) and (c)

Oxidation

No reaction occurs

Vinegar is dilute solution of:

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Acitic acid

Formic acid

Butyric acid

Propionic acid

The solution left after the formation of crystals is called :

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Residue.

Filtrate.

Mother liquor.

None of these.

The shape of CIO^-₃according to valence shell electron pair repulsion theory will be

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Planar triangle

Pyramidal

Tetrahedral

Square planar

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A solution of NaOH has pH = 13, then concentration of NaOH is

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10^-13M

10¹³M

10^-1M

10⁺¹M

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

Which of the following process is employed to convert alkyl halide into alcohol?

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Addition

Substitution

Dehydrohalogenation

Molecular rearrangement

Quantum number values for 2p orbitals are

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n = 2, l = 1

n = 1, l = 2

n = 1, l = 0

n = 2, l = 0

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

oxidation

Frmentation

Which behaves as insulator for animals body?

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Carbohydrates

Proteins

Fats

Skin

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