Question # 1

Grignard reagent is reactive due to :

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of them

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Light emitted from a source has its wave length 500nm, then its wave number will be

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2 x 10⁶m^-1

2 x 10⁷m^-1

5 x 10⁸m^-1

5 x 10⁹m^-1

Which alloy contains 50% copper, 25% zinc and 25% nickel

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German silver

Gun metal

Bell metal

Brass

A solution has pH = 0, its H⁺ion concentration is

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1 x 10^-14

1 x 10¹⁴

1 x 10¹

1

Which statement is true about order of reaction :

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Order of reaction can only be determined by an experiment.

Order of reaction can be determined from a balance equation only.

Order of reaction increase by increasing temperature.

Order of reaction must be in whole number and not in fraction.

Exposure to CO results in

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Headache

Fatigue

Unconsciousness

All of these

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a:

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Fiber

Plastic

Vanish

Polyamide resin

Which of the following is not charged particle

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Proton

Electron

Neutron

Hydrogen nucleus

The filtration process is used to separate solid from

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Liquid

Gas

Solid

All of above

Which of the following element is responsible for oxidation of water to O₂in biological process?

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Fe

Mn

Cu

Mo

Which of these polymers is an addition polymer?

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Nylon-6,6

Polystrene

Terylene

Epoxy resin

In Millikan method for determination of charge on electron the air in the chamber is ionized by

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Protons

Electric field

X-rays

a - particles

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

Linear shape is associated with which set of hybrid orbitals

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sp

sp²

sp³

dsp²

Which of the following was discovered first:

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Charge to mass ratio of electrons.

Mass of electrons.

Charge of electrons.

All of above at same time.

The radius of first orbit of hydrogen atom

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0.329 A°

0.429 A°

0.529 A°

0.229 A°

Replacement of hydrogen atom by - SO₃H group in benzene is called

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Nitration

Alkylation

Sulphonation

Acylation

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

An organic acdi having molecular formula C₂H₄O₂is

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Formic acid

Acetic acid

Oxalic acid

Propionic acid

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

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He

Ne

Kr

Xe

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

Metals like Fe, Mg, Al, Cr, Zn have more negative reduction potentials that is whey

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These don't react with steam

These react very slowly with steam to liberate H₂gas

These react rapidly with steam to produce the metallic oxides and liberate H₂gas

These react with cold water violently

Which one of the followings is a heterocyclic compound

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Cyclohexanol

Phenol

Pyridine

Anthracene

The largest number of molecules are present in

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3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

Which of the following is weakly acidic in nature

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Alcohol

Phenol

Aidehyde

Amide

Which more acidic?

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o-cresol

p-nitrophenol

phenol

m-cresol

Which one of the following has discontinuous solubility curve

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CaCI₂6H₂O

NaCI

KCI

NaNO₃

Glacial Acetic acid is

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Pure acetic acid at 100°C

Acetic acid mixed with methanol

Pure acetic acid at 0°C

Pure acetic acid above 16.6°C

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

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