Question # 1

Which of the following compounds contains the highest percentage by mass of nitrogen?

Choose an answer

Ammonia, NH₃

Ammonium carbamate, NH₂CO₂NH₄

Ammonium carbonate, (NH₄)₂CO₃

Hydrazine, N₂H₄

Which of the following is not a state function

Choose an answer

Pressure

Temperature

Enthalpy

Amount of substance

Product of concentration of ions raised to the power equal to the co-efficient of ions in balanced equation for saturated solution of a salt is called

Choose an answer

Ionic product

Equilibrium constant K_c

K_w

Solubility product (K_sp)

Which of the following possesses the highest melting point?

Choose an answer

Chlorobenzene

0-Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

2SO₂+ O₂⇌2SO₂H= 188KJ mole^-1

Which statement about following equilibrium is correct :

Choose an answer

The value ofK_pfalls with arise in temperature.

The value ofK_pis equal tok_c.

The value ofK_pfalls with the increase pressure.

Adding V₂O₅catalyst increase the equilibrium yield of Sulphur trioxide.

denaturing of alcohol is done by adding methanol in ethanol:

Choose an answer

10%

20%

30%

40%

The temp. used for the hydrogenation of alkenes using Ni is

Choose an answer

2000°C

400°C

200-- 300°C

1000°C

If the standard electrode potential of CU²⁺/Cu electrode is 0.34 V, what is the electrode potential of 0.01 M concentration of Cu²⁺? (T=298)

Choose an answer

0.399 V

0.281 V

0.222 V

0.176 V

Polysaccharides are also called

Choose an answer

Crystals

Sugars

Liquids

None sugars

Which is mild oxidizing agent ?

Choose an answer

Tollen's reagent

KMnO₄ / H₂SO₄

K₂Cr₂O₇ / H₂SO₄

HNO₃

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

Choose an answer

Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

Choose an answer

4-Bromobenzyl cyanide

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

Methyl alcohol is not used:

Choose an answer

As a solvent

As an anti-freezing agent

As a subsitution for petrol

For denating of ethyle alcohal

The reaction in which ketone is reduced to the alkane is called

Choose an answer

Kolb

Clemmensen

Cannizzaro

None

Rusting of iron is catalysed by

Choose an answer

Fe

O₂

Zn

H⁺

NaH is

Choose an answer

Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

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

3 moles of ethanol react with one mole of phosphorus tribromide to from 3 moles of bromoethane and on mole of X. Which of the following is X?

Choose an answer

H₃PO₄

H₃PO₂

HPO₃

H₃PO₃

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

Choose an answer

Light emitted from a source has its wave length 500nm, then its wave number will be

Choose an answer

2 x 10⁶m^-1

2 x 10⁷m^-1

5 x 10⁸m^-1

5 x 10⁹m^-1

Enzymes are chemically

Choose an answer

Carbohydrates

Proteins

Fatty acids

Phospholipids

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.

The percentage by weight of NaCl, if 6.0 g of NaCl is dissolved in 120 g of water is

Choose an answer

10.5 %

5%

8.02%

11.5%

The acids obtained by the hydrolysis of fats and oils are called

Choose an answer

Active compound

Fatty acids

Functional group

None

Analytical chemistry is the science of

Choose an answer

Chemical characterization

Physical characterization

Biological characterization

Biochemical characterization

The bond order for He₂molecule is

Choose an answer

zero

1/2

1

2

Choose an answer

Favour the formation of N₂O₄

Favour the decomposition of N₂O₄

Not alter the equilibrium

Stop the reaction

Which of the following correctly describes the process occurring at the electrodes when molten NaCl is electrolyzed:

Choose an answer

No reaction at anode, reduction at cathode.

No reaction at cathode, oxidation at anode.

Oxidation at anodes, reduction at cathode.

Oxidation at cathode, reduction at anode.

Choose an answer

Which of the following decolorized Br₂-water

Choose an answer

Methane

Ethane

Ethene

Propane

Strong oxidizing agents have

Choose an answer

Greater positive value of standard reduction potential

Lesser positive value of standard

Greater negative value of standard

None of 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