Question # 1

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

CO2 the oxidation number of C =.

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+1

+2

+3

+4

Bucky balls are ____________ allotropic forms of carbon.

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1st

2nd

3rd

4th

The right most position in the periodic table is occupied by:

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

________________ in linear in shape.

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CO+

CO2

H2O

NH3

It is heterogeneous mixture

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Sand

Milk

Air

Brass

Silver is a ____________ metal.

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Pure

Noble

None

All

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

There are ____________ states of matter

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4

3

2

1

Electron ________________ energy when they jump from low to higher level.

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Absorb

Radiate

Nothing

Nil

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

One H₂O molecule can form hydrogen bonding with how many other H₂O molecules?

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One

Two

Three

Four

The density of water is ................. at 4^oC

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1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

Who was prepared acetic acid in laboratory?

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Berzelius

Wohler

Kolbe

Dalton

Which helps in lowering of cholesterol level?

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Vitamin

Fiber

Carbohydratres

All of them

Concentration is a .

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Mixing technique

Separating technique

Boiling technique

cooling technique

Which one of the following gases is used to destroy harmful bacteria in water.

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Iodine

Chlorine

Fluorine

Bromine

The alkanes consisting of C₅ to C₁₀

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gases

liquids

solid

plasma

In the troposphere (lowest layer), the temperature decreases form 17°C to;

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-58°C

-93°C

-61°C

-49°C

Which is used to remove the grease stains from clothes?

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NaOH

KOH

Al(OH)₃

NH₄OH

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Which of the following compound has the highest % o f oxygen by weight

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CH₃- OH

C₂H₅OH

HCOOH

H₂O

Stoichiometric calculations cannot applied to reversible reactions because.

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Product again changes to reactant

Less product is formed

Reaction goes only in one direction

Products do not disappear.

More abundant isotope of an element is the one with.

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Even atomic number

Odd atomic number

Even mass number

Odd mass number

How should the conditions be changed to prevent the volume of a give gas from expanding when its mass is increased.

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Temperature is lowered and pressure is increased.

Temperature is increased and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

What is the mass of aluminium is 204 g of the aluminum oxide Al2O3.

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26 g

27 g

54 g

108 g

Which statement about Gooch crucible is incorrect.

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It is made up of porcelain

Quick filtration occur by using suction filtering apparatus

All the chemicals which reacts with paper can be filtered.

Filter medium used in this crucible consists many folds of filter paper only.

Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

When aqueous NaCl is electrolyzed, which of the following ions gas discharged at anode.

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Cl-

OH-

Na+

H+

One of the following substances does not undergo sublimation

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KMnO₄

Naphthalene

NH₄CI

Iodine

Which substance is used to consulate rubber latex

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Ethyl alcohol

Acetaldehyde

Acetic acid

Water

The length of the polymer chain is specified by the number of repeating units which is called.

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Condensation

Co-polymerization

Iodine number

Degree of polymerization

P2O5 is usually used as

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Drying agent only

Reducing agent

Both drying and reducing agent

Both drying agent and oxidizing agent.

In group VA elements the most electronegative elements is.

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Sb

N

P

As

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Which one of the following is an amide

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(NH₂)₂CO

NH₂.CH₃

C₆H₅NH₂

N(CH₃)₃

The catalytic oxidation of methane produces

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CO + H₂O

CO₂+ H₂O

C₂+ H₂O

H₃C - OH

Out of the elements of group VIA the highest melting and boiling points is shown by the element.

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Te

Se

S

Po

Starch is polymer is

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Fructose

a -d Glucose

Sucrose

B-D-Glucose

Acetic acid is commercially prepared form

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Ethene

Ethane

Ethyne

Ethanol