Question # 1

Which of the substance is not going to react the sodium metal:

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Acetic acid

Methanol

Di methyl ether

Ethanol

Ocean contains part earth's water:

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95%

96%

97%

98%

SN2-reactions can be usually observed in

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Primary alkylı halide

secondary alkyl halide

Tertiary alkyl halide

Both A. and B

The elements like N,P,K added into the large amount in soil are called:

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Basic elements

Additives

Macronutrients

Micronutrients

The species which are produced by heterolytic bond breaking and can act as electron pair donor

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Free radicals

Cations

Nucleophiles

electrophile

A reaction A- B is independent of concentration of reactant A. The order of reaction will be

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First order

Second order

Third order

Zero order

For the purpose of interacts which one of the following arrangements represents the correct of increasing stability?

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covalent < hydrogen bonding < London forces < dipole-dipole

London forces < hydrogen bonding < dipole-dipole < covalent

London forces < dipole-dipole < hydrogen bonding < covalent

Dipole-dipole < London forces < hydrogen bonding < covalent

Which substance among the following used in points to improve the mechanical properties?

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filter

binder

pigment

stablizer

In order to maintain the boiling point of water at 110 C°, the extemal pressure should be

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550 torr

between 500 and 760 tor

between 760 and 1500 torr

any pressure can be maintained

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

Instantaneous dipole-induced dipole forces are also known as:

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dipole-dipole interactions

hydrogen bonds

covlent bonds

Van der Waals forces

In Tolten's best, the end product is ______ formed

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White ppts

Red ppts

Yellow ppts

Silver mirror

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

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Zero

1

2

1.5

Which of the following particles has longest wavelength, if they have same speed:

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Proton.

Neutron.

Electron.

Positron.

Isopropyl alcohol on oxidation gives

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Acetone

Ether

Ethylene

Acetaldehyde

Anode is the surface on which probability of finding electron is:

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50%

Less than 10%.

More than 95%.

Zero.

Which acid is used in the manufacture of synthetic fibre

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Formic acid

Phthalic acid

Carbonic acid

Acetic acid

The freezing mixture used in ice cream machine consists of ice and

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NaCI

KCI

MgCI₂

NaNO₃

The decrease in radius in large for:

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Monovalent ions.

Trivalent ions.

Divalent ions.

Atoms.

A fibre which is made from acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

Heaviest particle is

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Meson

Neutron

Proton

Electron

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