Question # 1

A limiting reactant is one which according to the stoichiometric equation

Choose an answer

Has excess mass

Has least mass

Has excess number of moles

Has least number of moles

Ethyl acetate is obtained when methyl magnesium iodide reacts with

Choose an answer

Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

A solution having pH = 4 its OH^-ion concentration in mole dm^-3is

Choose an answer

1.0 x 10^-4

1.0 x 10^-10

1.0 x 10^-14

1 x 10⁰

In the extraction of iron, slag is produced which is

Choose an answer

CO

FeSiO₃

MgSiO₃

CaSiO₃

Which period starts from ₁₁Sc to ₃₀Zn ?

Choose an answer

First Period

Second Period

Third Period

4th Period

Formic acid is obtained when

Choose an answer

Calcium acetate is heated with conc.H₂SO₄

Calcium formate is heated with calcium acetate

Glycerol is heated with oxalic acid

Acetaldehyde is oxidized with K₂Cr₂O₇and H₂SO₄

Which of the following statements is not correct regarding bonding molecular orbitals?

Choose an answer

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

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

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

Which of the following method is most appropriate for the manufacture of methane?

Choose an answer

By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

pH of water is 7, if 0.01 M NaOH is added, than its pH is

Choose an answer

12

14

zero

10

Polysaccharides are also called

Choose an answer

Crystals

Sugars

Liquids

None sugars

Which one of the following statements of glucose and sucrose is incorrect?

Choose an answer

Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

The three N - Hσ-bonds are made by

Choose an answer

sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

Colligative properties are the properties of :

Choose an answer

Dilute solutions which behave as nearly ideal solutions.

Concentrated solutions which behave as nearly non-ideal solutions.

Both(i) and (ii)

Neither (i) nor (ii)

A pollutant affects

Choose an answer

Human health

Quality of life

Functioning of ecosystem

All of these

Denaturation of protein means the structure of protein is disrupted, indicate which factor foes not denature protein

Choose an answer

Heating protein

pH changes

Oxidising agent

Keeping pH 7.35

Strong reducing agents gave

Choose an answer

Greater positive value of standard reduction potential

Greater negative value of standard reduction potential

Lesser positive value of standard reaction potential

None of these

The ionic strength of a solution containing 0.1 mole/kg of KCl and 0.2 mole/kg of CuSO₄is

Choose an answer

0.3

0.6

0.9

0.2

Bronze is an alloy of Cu and

Choose an answer

Zn

As

Sb

Sn

The empirical formula of a compound is CH₂O. What may be the compound

Choose an answer

C₂H₅OH

C₆H₅OH

HCOOH

Choose an answer

1, 5-pentadiene

Penta-1, 4-diene

1, 1-pentadiene

1, 4-pentene

In a Galvanic cell, the electrons flow from

Choose an answer

A node to cathode through the solution

Cathode to anode through the external circuit

Anode to cathode through the external circuit

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

Choose an answer

Na metal

F₂gas

Al metal

O₂gas

The solubility product of AgCl is 2.0 x 10^-10mole ²dm^-6. The maximum concentration of Ag⁺ions in the solution is

Choose an answer

2.0 x 10^-10mole dm^-3

1.41 x 10^-5mole dm^-3

1.0 x 10^-10

4.0 x 10^-20mole dm^-3

What is the molarity of H₂SO₄solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?

Choose an answer

4.18 M

8.14 M

18.4 M

18 M

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

Choose an answer

dxy

dxz

dz²

dx²- y²

Which is an essential constituent of chlorophyll

Choose an answer

Be

Fe

Mg

Ca

The chemical formula of magnesite is

Choose an answer

MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

Copolymer is

Choose an answer

Nylon-6

Nylon 66

PMMA

Polyethene

Which of the following factors does not influenced the rate of reaction

Choose an answer

Concentration of the reaction

Nature of the reactants

Molecularity of the reaction

Temperature

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

Choose an answer

Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

Choose an answer

Glyceraldehyde

Dihydroxy acetone

Glycerose

None

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