Question # 1

............. are sonorous.

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Metals

Solids

Metals

Force

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

The mixture of two component is called .

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Homogeneous mixture

Binary solution

Both a & b

Nil

Dissolution in water is due to ____________ bonding.

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Ionic

Covalent

Hydrogen

Nil

In a discharge tube, the pressure of a gas is kept at

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

The boiling point of H2O is:

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100

12

1.105

9

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

Which one of the following is a galvanic cell?

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Daniel cell

Nelson's cell

Down's cell

Both B and C

Polyatomic molecules consist of _________ atoms.

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1

More than 1

Less than 1

2

The elements of group 3 to 12 are called

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Normal elements

Transition elements

Radioactive elements

None of these

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Chloroform is used for

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Anesthesia

Fever

Link

Toys

Carbon black is used in the manufacture of.

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Dry cleaning

Shoe polishes.

Fertilizer

None of these

All bases turn red litmus

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Red

Blue

Pink

White

Alkynes are also called.

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Olefine

Ethene

Paraffins

Acetylenes

Which compound do not produce in the halogenation of methane.

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Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

When glucose and fructose combine they produce

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Starch

Cellulose

Sucrose

None of these

Which disease cause liver inflammation?

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Typhoid

Jaundice

cholera

Hepatitis

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

If Qc < Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

Which is not an air pollutant?

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CO₂

CO

SO₂

NH₃

A limiting reactant is one.

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Which is present in least amount

Which produces minimum number of moles of product

Which produces maximum number of moles product

Does not effect the amount of product.

A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed

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If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

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Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

Splitting of spectral lines when atoms are subjected to strong electric field is called.

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

Hund's rule state that when electrons enter to the same sub levels they are.

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Singly occupied with same spin

Doubly occupy with same spin

Singly occupied with different spin

Doubly occupied with different spin

Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities.

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Filtration

Crystallization

Common ion effect

Chromatography

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

The volume occupied by 1.4 g on N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

The boiling point of water at the top mount Everest is.

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59^oC

69^oC

83^oC

75^oC

Suppose a new element 'J' has discovered and has seven electron in the valence shell. Which statement about this element would be correct.

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It is monatomic

It form covalent bond with hydrogen

It forms stable positive ion

It forms covalent bond with group IA element

The vapour pressure of an aqueous solution of glucose is.

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Equal to vapour pressure of water

Independent of temperature

More than vapour pressure of pure water

Less than vapour pressure of pure water

Ortho boric acid on strong beating gives.

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Borax

Boron oxide

Metaboric acid

Tetraboric acid

Which isomerism is not found in alkenes.

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Chain isomerism

Positional isomerism

Geometrical isomerism

Metamerism

Which compound shows maximum hydrogen bonding with water.

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CH3OH

C2H5OH

CH3-O-CH3

C6H5OH

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Elements of Groups IIA are called

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Alkali metals

Alkaline earth metals

Coinage metals

Halogens

Tincal is a mineral of.

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Al

B

Si

C

What type of reaction occurs between ethene and hydrogen.

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Addition

Substitution

Oxidation

Dehydration

The reaction of alkyl halides with sodium metal in the presence of ether to from alkane is known as.

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Wortz reaction

Frankland reaction

Sabatier sendron

Kolbe's synthesis

Boric acid is used as eye wash due to its

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Weakly acidic property

Antiseptic nature

Antibiotic nature

Weakly basic properties

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

Which compound is called a universal solvent.

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H2O

CH2OH

C2H5OH

CH5-O-CH3