Question # 1

The rate equation for a reaction is Rate =k[A]. what are unit of K ?

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Mole-1 dm³ S^-1

Mole dm³ S^-1

Moledm³

S^-1

In the modern periodic table the elements are placed in the ascending order of their

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Atomic masses

Melting points

Boiling points

Atomic numbers

Which of the following is a member of -block

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Zn

Al

B

Br

F₂, Cl₂, Br₂and l₂lie below SHE is the Electro chemical series that is why these

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Undergo reduction

Undergo oxidation

Liberate H₂gas with steam

None of these

Acyl halide is formed by reacting PCl₅with

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Alcohol

Ester

Amide

Both carboxylic acids as well as esters

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

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High temperature and low pressure

Low temperature and high pressure

Low temperature and low pressure

High temperature and high pressure

Glutamic acid, aspartic acid are ______ amino acid

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Acidic

Basic

Neutral

None of these

Four d-orbitals contain four lobes while fifth contains only two lobes the orbital is

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dxy

dxz

dz²

dx²- y²

Which of the following will have the highest boiling point?

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Methanal

Ethanal

Propanal

2-Hexanone

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

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Change in internal energy

Enthaply change

Temperature change

Work done by the system

In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms

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αandβ

αandα

αand Y

None of these

Spectrum of white light is continuous becuase

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Colors separated by dark spaces

There are no boundary lines between the colours

The radiations are in infrared region

The radiatins fall in ultraviolet region

By simply reacting Grignand's reagent with water we get

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An alkane

Higher alkane

An alkene

An alkyne

Which is used as an antifreeze?

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Glycol

Ethyl alcohol

Water

Methanol

Tincal is a mineral of:

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Al

B

Si

C

Those amino acids which contain two carboxylic groups are called ______ amino acids

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Acidic

Basic

Neutral

None of these

The compounds or species in search of electrons are called

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Elctrophiles

Nucleophile

Nitrities

Bases

Alkyl halides are reactive :

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High

Medium

Less

Least

The solution of which acid is use for seasoning of food?

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Formic acid

Acetic acid

Benzoin acid

Butanoic acid

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

Methanol and ethanol can be distinguished by

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Iodoform test

Iucas test

Dichromate/H₂SO₄oxidation test

Flame test

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

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Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

Claisen reaction

The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

On the basis of VSEPR theory SO₂is a

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Liner molecule

A bent molecule

A strong molecule

A gaseous molecule

Coupling of Pb with its Pb⁺⁺/Pb = -0.13 V and Ag with Ag⁺/ Ag = +0.80 V, the cell reaction

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Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

Which is the most volatile compound

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Hl

HCl

HBr

HF

The hydrocarbon used for polymerization is

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Alkanes

Alkenes

Alkynes

All of above

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

Water pollution is mainly due to

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Sulphure dioxide

Carbon dioxide

Oxygen

Industrial discharges

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