Question # 1

What mass of NaOH is required to prepare 2.5 dm³of 1.5 M NaOH solution

Choose an answer

130 g

140 g

150 g

160 g

Alpha rays consist of:

Choose an answer

Neutrons.

Helium nucleus.

Protons.

Hydrogen nucleus.

Phosphorus helps the growth of

Choose an answer

Root

Leave

Stem

Seed

Choose an answer

Proton donar

Dehydrating agent

Catalyst

Electrophile

The compound which gives oxygen on moderate heating is

Choose an answer

Zinc oxide

Mercuric oxide

Aluminium oxide

Ferric oxide

Which of the following pair contains isomers of each other

Choose an answer

Propanoic acid and propanone

Acetone and acetaldehyde

Ethyl alcohol and diethyl ether

Methyl alcohol and dimethyl ether

Equal volumes of 0.1 M AgNO₃and 0.2 M NaCl are mixed. The concentration of NO^-₃ions in the mixture will be

Choose an answer

0.1 M

0.05 M

0.2 M

0.15 M

The liquid obtained after passing the mixture through filter paper is termed as:

Choose an answer

Extract

Residue

Filtrate

Sample

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

Choose an answer

From the difference between expected bond energies for the normal covalent bond and experimentally determined values Pauling calculated the values of

Choose an answer

Ionization potential of elements

Electron affinity of elements

Electronegativity of elements

Bond length

Smallest charge of electricity that has been measured so far is

Choose an answer

Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

By reaction Grignard's reagent with the HCHO we get

Choose an answer

1° - alcohol

2° - alcohol

3° - alcohol

All of these

How many structural acid cis-trans isomers are there for dichloroprepe, C₃H₄Cl₂

Choose an answer

3

5

6

7

Choose an answer

1st order

2nd order

Zero order

3rd order

0.1 MHCI has pH = 1.0, it is about 100 times stronger than acetic acid. Then pH of acetic acid will be

Choose an answer

0.1

2.0

1.3

3.0

The oxidation number of H is -1 in the compound

Choose an answer

H₂O

H₃BO₃

NaOH

NaH

The method involved for electrolysis of Na or K salts of carboxylic acids

Choose an answer

Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

Choose an answer

Excitantion of an electron from 2s to 2p-orbital

Transfer of three electrons from B to the other atoms

Excitation of two electrons form 2s orbital to 2p orbital

Formation of molecular ion

With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:

Choose an answer

Greater.

same.

Smaller.

Not fixed.

What is formed when oxalic acid is dehydrated by conc. H₂SO₄?

Choose an answer

C + CO₂

CO

CO₂

CO + CO₂

An aqueous solution is neutral when its

Choose an answer

pH = 14

pH = zero

pH = 7

Kw = 10^-7

The element caesium bears resemblance with

Choose an answer

Ca

Cr

Rubidium

None of the above

Which is non typical transition element :

Choose an answer

Ni

Co

Y

Fe

The diameter of atoms is of the order:

Choose an answer

2* 10^-5m

2* 10^-10m

2* 10^-2m

2* 10^-3m

A pair of elements in the same family in the periodic classification is

Choose an answer

Cl and C

Ca and Al

N and Ne

Na and K

Which of the following favours the reverse reaction in chemical equilibrium?

Choose an answer

Increasing the concentration of the reactant

Removal of the least one of the products at regular intervals

Increasing the concentration of one or more of the products

None of these

When acetamide is hydrolysed by boiling with acid the product obtained is

Choose an answer

Ethyl amine

Ethyl alcohol

Acetic acid

Acetaldehyde

Synthetic polymer prepared from caprolactum is known is

Choose an answer

Nylon 610

Teflon

Terylene

Nylon-6

In which of the following pairs, the numbers of electrons in the outermost shell are different?

Choose an answer

As,Sb

Ge,Sn

In,pt

Se,Te

Baking powder has which one of the following formula

Choose an answer

Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Choose an answer

Initial concentration of reaction

Initial concentration of products

Final concentration of products

Order of the reaction

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