Question # 1

Hydroxyl amine is a derivative of::

Choose an answer

Alcohol

Aldehyde

Ammonia

Ketone

Hypo is used in photography for

Choose an answer

Developing picture

Picture printed

The colour of picture

The fixation of picture

Grignard's reagent is

Choose an answer

Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Selection of filter paper depends upon sizes of particles to be:

Choose an answer

Tested

^Filtered

Checked

All of above

Which element should have the greatest value for electronegativity when combined with hydrogen

Choose an answer

Na

Si

S

Cl

The acid present in the stings of bees and wasps in

Choose an answer

Acetic acid

Formic acid

Formalin

Formaldehyde

The largest number of molecules are present in

Choose an answer

3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

Estimation of Na in sea water is an example of

Choose an answer

Numerical analysis

Qualitative analysis

Quantitative analysis

None of above

Sodium can be obtained by :

Choose an answer

Electrolysis of acidified water.

By heating NaCl and water at 100°

Electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride.

Transition elements have valence electrons in

Choose an answer

s-orbital

p-orbital

d-orbital

f-orbital

Closed chain compound can be classified into

Choose an answer

Homocyclic

Hetrocyclic

Aliphatic

Both a and b

Which of the following species has unpaired electrons in antibonding molecular orbitals

Choose an answer

The relation between Kc and Kp is

Choose an answer

What happens when CCl₄is treated with AgNO₃solution?

Choose an answer

NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Which of the following is known as wood spirit

Choose an answer

Ethyl alcohol

Propyl alcohol

Methyl alcohol

Butyl alcohol

Which of the following statements is no correct regarding bonding molecular orbitals?

Choose an answer

Bonding molecular orbitals possess ls energy than atomic orbitals from which they are formed.

Bonding molecular orbitals have low electron density between the two nuclei.

Every electron in bonding molecular orbitals contributes to the attraction b.w atoms.

Bonding molecular orbitals are formed when the electron waves undergo constructive interference.

Interstitial compounds have

Choose an answer

Half formula

Fixed formula

Indefinite formula

None

Boiling point of acetic acid is ^oC

Choose an answer

116

117

118

119

Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

Choose an answer

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

Choose an answer

NO₂makes the electron rich ring at ortho and para positions

NO₂withdraws electrons at metaposition

NO₂donate electrons at m-position

NO₂withdraws electrons at ortho and para position

Which one is the most toxic?

Choose an answer

Carbon

CO

CO₂

SO₂

Ammonia like water also reacts with Grignard's reagent to give

Choose an answer

Alkane

Alkene

Alkyne

Amide

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

Choose an answer

Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

Pick up the correct statement

Choose an answer

CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog

Classical smog has an oxidizing character while the phtochemical smog is reducing in character

Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours

During formation of smog the level of ozone in the atmosphere goes down

The ionic product of H⁺ions and OH^-in water is called ionization constant of water Kw. The value of Kw at 25°C is

Choose an answer

0.11 x 10^-14

0.30 x 10^-14

1.0 x 10^-14

3 x 10^-14

Carbon monoxide is harmful to human beings as it

Choose an answer

Is carcinogenic

Is antagonistic to CO₂

Has higher affinity for hemoglobin as compared to oxygen

Is destructive to O₃

Hydrolysis of protein by 6M HCl gives peptides and thenα-amino acids. How manyα-amino acids molecules are obtained on the hydrolysis of a tetrapeptide

Choose an answer

2

3

4

5

A reaction is reversible because :

Choose an answer

Products are stable.

Reactants are reactive.

Products are reactive.

Reactants re stable.

Chief ore of aluminium is:

Choose an answer

Na₃AIF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃ .H₂O

Choose an answer

1

2

3

4

In an experiment the concentration of a reactant 'A' is doubled the rate increases four times. If concentration in tripled, then rate increases nint times. Thus the rate is proportional to ______ of concentration of 'A'

Choose an answer

Square root

Square

Twice

Cube

More Classes

Other Links

ECAT Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer