Question # 1

At present the number of cement factories is Pakistan are

Choose an answer

20

22

25

30

Which is the chain isomer of n-pentane

Choose an answer

Isopentane

Neopentene

N-pentene

Isopentene

Alcohals can be distinguished using test:

Choose an answer

Lucas

Tollen's

Koib's

William's

Oxidation number of oxygen in OF₂is

Choose an answer

+1

-1

+2

-2

The alkali metals form

Choose an answer

Ionic bond

Covalent bond

Co-ordinate bond

H-bond

Pro stand for

Choose an answer

Valine

Alamine

Glycine

Proline

The active part in a molecule is called

Choose an answer

Hetroatom

Functional group

Chemical bond

Ion

Which element among the following belongs to Group IV-A of the periodic table?

Choose an answer

Barium

Iodine

Lead

Oxygen

Which is not a calcareous material

Choose an answer

Lime

Clay

Marble

Marine shell

Which one of the following has been hydroxyl and carboxylic acid groups

Choose an answer

Phenols

Picric acid

Phthalic acid

Salicylic acid

Choose an answer

Alkyl

Alkyl nitrile

Cyanogens

Amine

For a 3P subshell the set of principle and azimuthal quantum number is

Choose an answer

n = 1 , l = 2

n = 3, l = 0

n = 3, l = 1

n = 1, l = 3

Al³⁺is a symbol for aluminium

Choose an answer

Atom

Ion

Cation

Anion

95% ethanol is called:

Choose an answer

Rectified other

Diesel

Rectified spirit

Petrol

The volume of 0.1 M H₂SO₄required to neutralize completely 40 ml of 0.2 M NaOH solution is

Choose an answer

10 ml

40 ml

20 ml

50 ml

Choose an answer

Zn

H

S

O

Of the given alkali metals, the one with smallest size is

Choose an answer

Rb

Cs

K

Na

One mole of ethanol and one mole of ethane have an equal

Choose an answer

Mass

Number of atoms

Number of electrons

Number of molecules

Carboxylic acid can generally be prepared by various methods. Which of the following methods is not suitable for making carboxylic acids

Choose an answer

By the oxidation of primary alcohols

By the hydrolysis of nitriles

By the carbonation of Grignard, reagent

By the hydrolysis of p-amines

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

Choose an answer

Standard electrode potential

Electric charge

Ionization potential

Electroplating

All C - H bond lengths of benzene ring is

Choose an answer

1.07A°

1.09A°

1.08A°

None

The chemical formula of magnesite is

Choose an answer

MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

Spontaneous reaction is such in which the system decreases its ______

Choose an answer

Energy

Free energy

Entropy

All

Half life period of a reaction is inversely proportion to the initial concentration of the reactant, then order of reaction is

Choose an answer

Third order

Second order

Fist order

Zero order

In the expression rate = K [A]^a[B]^bK is

Choose an answer

The order of reaction

The speed of reaction

The specific rate constant

The overall order of reaction

Which one of the following reaction takes place spontaneously

Choose an answer

Alkynes normally have ______ hybridization

Choose an answer

Sp

Sp²

SP³

d sp³

Bell metal is an alloy of Sn and

Choose an answer

Copper

Iron

Zinc

Magnesium

Which one of the following statement is wrong regarding differences between aldehydes and ketones

Choose an answer

Aldehydes undergo reduction to form primary alcohols while ketones undergo reduction to form secondary alcohols

Aldehydes undergo oxidation to form acids having less number of carbon atoms while ketones undergo oxidation to form acids having same number of carbon atoms

Aldehydes give positive silver mirror test while ketones give negative -mirror test

Aldehydes can undergo polymerization while ketones cannot undergo polymerizarion

The fractions obtained from fractional distillation of petroleum are placed in increasing order of their boiling points. Which order is correct

Choose an answer

Natural gas, petroleum ether, gasoline kerosene

Petroleum ether, kerosene, natural gas, petroleum ether

Gasoline, kerosene, natural gas, petroleum ether

Kerosene, gasoline, petroleum ether, natural gas

Which of the following acts as ligand

Choose an answer

NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

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