Question # 1

Each of the following is true of white and red phosphours except that they

Choose an answer

Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Which three elements are needed for the healthy growth of plants

Choose an answer

N, S, P

N, Ca, P

N, P, K

N, K, C

The term cryoscopy is used for

Choose an answer

Depression of freezing point

Elevation in boiling poing

Lowering of vapour pressure

Osmotic pressure

Kolb's method is not useful for the production of

Choose an answer

Methane

Ethane

Propane

Butane

The chemical reactivity of glass is reduced by the use of

Choose an answer

Fluxes

Formers

Stabilizers

None of these

The solid remained on filter paper during the filtration is called the :

Choose an answer

Substance.

Residue.

Undue.

Filtrate.

Quality of fuel is judged from its octane number. The best fuels are

Choose an answer

Straight chain hydrocarbons

Branched chain hydrocarbons

Cyclic compounds

Compounds containing benzene ring

Which has greater number of moles

Choose an answer

0.1 g sodium

6.02 x 10²⁰atoms of magnesium

20 cm³0.1mole per dm³of NaOH

12.2 dm³of nitrogen at standard

[A_rNa = 23, Mg = 24, O = 16]

Copper oxide is dedected by borax bead test with colour:

Choose an answer

Blue

Red

Yellow

Black

Lead accumulator contains

Choose an answer

30% NaCI solution as electrolyte

30% HCI solution as electrolyte

30% H₂SO₄solution as electrolyte

30% NaOH solution as electrolyte

In incinerating the waste is burnt at

Choose an answer

1000°C

100°C

2000°C

1500°C

Rutherford's experiment led to the discovery of

Choose an answer

Nucleus

Electron

Proton

alpha particle

5-d series is in the period :

Choose an answer

4th

5th

6th

7th

It rate law of an equation is written asdx/dt=K[A][B] ?

Choose an answer

Reaction is independent of the concentration of A and B.

Product is decreasing with passage of time.

Reactant in increasing with passage of time.

Reactant is increasing with passage of time.

Picric acid is

Choose an answer

2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

Glucose in the presence of zymase is converted into

Choose an answer

Alcohol

Acid

Ethyl alcohol

Ketone

Choose an answer

2

3

4

9

Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm^-3. The molarity of HCl solution is

Choose an answer

10.23 moles dm^-3

11.55 moles dm^-3

11.73 moles dm^-3

12.67 moles dm^-3

The molal elevation constant is the ratio of the elevation in boiling point to

Choose an answer

Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

Select from the following the one which alcohol

Choose an answer

Which has the largest radius?

Choose an answer

CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Which statement explains the observation that magnesium hydroxide dissolve in aqueous ammonium chloride, but not in aqueous sodium chloride

Choose an answer

The ionic radius of the NH₄⁺ion is similar to that of Mg²⁺but not that of Na⁺

NH₄Cl dissociates less fully than NaCl

The ions Na⁺and Mg²⁺are isoelectronic (have the same number of electrons)

The ion NH⁺₄acts as an acid

Choose an answer

Positive sign

Negative sign

Without any sign

None

Group VI-B of transition elements contains:

Choose an answer

Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Choose an answer

Environment

Hydrosphere

Pollutant

Biosphere

One of the following bonds is polar but compound is non-polar

Choose an answer

H₂O

NH₃

HCl

CO₂

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

Choose an answer

HCHO

CH₃CHO

CH₃COCH₃

CO₂

In the periodic table, the element with atomic number 16 will be placed in the group

Choose an answer

Fourteen

Sixteen

Thirteen

Fifteen

The quantum number which describe the orientation of the orbitals is

Choose an answer

Spin quantum number

Principle quantum number

Azimathal quantum number

Magnetic quantum number

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

Choose an answer

The base used in Cannizzaro's reaction is

Choose an answer

NaOH

KOH

CHI₃

All 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