Chemistry test - Study chemistry online courses

Test Question Set 1

/14

Chemistry test

1 / 14

The oxidation number of chromium in Cr₂O₅

2 / 14

Write down the common names of the following organic compound

CH₂CH₂CH₂CH=CH₂

3-pentylene or γ-pentylene.

1-pentylene or α-pentylene

2-pentylene or β-pentylene.

1-pentylane or α-pentylane.

3 / 14

The number of gaseous molecules left in a volume of 1 mm³ if it pumped out to give a vacuum of 10⁻⁶ mm Hg at 298

3.248 × 10⁷

3.240 × 10⁷

4.240 × 10⁷

2.240 × 10⁷

4 / 14

The oxidation number of phosphorus in Ba(H₂PO₂)₂

5 / 14

The oxidation number of Iron in [Fe(H₂O)₅(NO)⁺]SO₄

+1.5

6 / 14

Shielding constant of the 4S electron of chromium atom

7 / 14

Arrange the following alkenes in order of increasing stability

Me₂C=CH₂
cis-MeCH=CHMe
trans-MeCH=CHMe
MeCH₂CH=CH₂

4ㄑ2ㄑ3ㄑ1

4ㄑ2ㄑ1ㄑ3

1ㄑ2ㄑ3ㄑ4

2ㄑ4ㄑ3ㄑ1

8 / 14

What is the radius of the Argon atom if Tc = - 122°C, Pc = 48 atm?

1.40 × 10⁻⁸ cm

1.57 × 10⁻⁸ cm

1.38 × 10⁻⁸ cm

1.47 × 10⁻⁸ cm

9 / 14

Boyle temperature of nitrogen gas if a = 1.4 atm lit² mol⁻² and b = 0.04 lit mol⁻¹

10 / 14

The number of water molecules in 250 ml of water is closest to
Given the density of water 1.0 gm ml^-1, Avogadro number =6.023 × 10²³

11 / 14

The number of molecules presents per ml of an ideal gas maintained the pressure of 7.6 ×10⁻³ mm of Hg at 0°C

12 / 14

Effective nuclear charge of the hydrogen atom

13 / 14

The Critical constants for water are 647 K, 22.09 MPa and 0.0566 dm³mol⁻¹, the value of Van der Waals constant b

14 / 14

1 debye is equal to how many coulomb meters?

Your score is

LinkedIn Facebook Twitter

Please rate this quiz

Inorganic Chemistry

Hydrogen bonding definition and examples

Common types of chemical bond

Ionization energy trends in periodic table

Define pH and pOH scale

Electron affinity periodic table

Slater’s rule shielding electron

Physical properties and uses of hydrogen

Preparation and uses of borax

Electromagnetic spectrum radiation

f block elements in periodic table

Quantum number orbitals diagram

Atomic theory questions answers

Hard soft acid base examples

Properties of Acids and Bases

Lewis concept of acids and bases

Conjugate acid base pair examples

Acids and bases questions answers

Test Question Set 2

1 / 7

Comment on the possibility of defining a Boyle Temperature if a=b=0

The gas has no Boyle temperature

The gas has a definite Boyle temperature

All the temperatures are Boyle temperatures

When a = b = 0, Van der Waals equation

PV = RT

$T_{B}=\left [ \frac{\partial \left ( PV \right )}{\partial P} \right ]_{T}=0$

That is at any temperature this becomes zero and so all the temperature is Boyle temperatures.

$T_{B}=\frac{a}{R\times b}$

2 / 7

The Boyle temperature of nitrogen gas given a=1.4 atm lit² mol^-2 and b = 0.04 lit mol^-1

432 K

437 K

427 K

430 K

3 / 7

Comment on the possibility of defining a Boyle temperature if a=0

The gas has no Boyle temperature

The gas has a definite Boyle temperature

All the temperatures are Boyle temperatures

When, a = 0, Van der Waals equation,

P (V - b) = RT
or, PV = RT + Pb

Differentiating with respect to pressure at a constant temperature.

$T_{B}=\left [ \frac{\partial \left ( PV \right )}{\partial P} \right ]_{T}=b\, but\, b\neq 0$

$T_{B}=\left [ \frac{\partial \left ( PV \right )}{\partial P} \right ]_{T}\neq 0$

The gas has no Boyle temperature since at any temperature.

4 / 7

What are the CGS and SI units of Van der Waals constant b?

m² mol⁻¹ and cm² mol⁻¹

m² mol⁻² and cm² mol⁻²

m³ mol⁻¹ and cm³ mol⁻¹

m⁴ mol⁻¹ and cm⁴ mol⁻¹

$\therefore deviation=\frac{4.92-4.904}{4.904}\times 100=0.326$

5 / 7

Find the extent of deviation from the ideal behavior of 2 moles of nitrogen gas occupying 10 lit volume at 270°C
Given, a = 1.4 atm liter² mol^-2 and b=0.04 lit mol^-1.

0.328%

0.330%

0.322%

0.326%

$unit\, of\, a=\frac{unit\, of\, P\times \left ( unit\, of\, V \right )^{2}}{\left (unit\, of\, n \right )^{2}}$

6 / 7

What is the SI unit of Van der Waals constant a?

newton m⁴ mol⁻²

dyne m⁴ mol⁻²

N cm⁴ mol⁻²

N m⁶ mol⁻²

7 / 7

If a = 1.4 atm liter² mol^-2 and b=0.04 lit mol^-1, the pressure of 2 moles of nitrogen gas occupying 10 lit volume at 270°C

4.804

4.904 atm

4.906

4.004

Your score is

The average score is 0%

LinkedIn Facebook Twitter

Test question Set 3

Alkenes olefins questions

1 / 5

IUPAC name of CH₃CH₂C(CH₃)=CH₂

3-methylbut-1-ene

methylbut-1-ene

2-methylbut-1-ene

2-methylbut-2-ene

2 / 5

How many geometric isomers possible in butene?

3 / 5

CH₃ㄧ(H₃C)C=CH₂
Substituted name of the above hydrocarbon

but-1-ene

sym-dimethyl ethylene

dimethyl ethylene

as-dimethyl ethylene

4 / 5

CH₃-CH=CH-CH₃
The common name of the above alkene

α-butylene

1-butylene

β-butylene

butylene

The structure can be written as

CH₃-CH₂-CH=CH-CH₃

5 / 5

IUPAC name of the alkene CH₃-CH₂-CH=C₂H₄

pent-1-ene

pent-2-ene

pent-3-ene

but-1-ene

Your score is

The average score is 0%

LinkedIn Facebook Twitter

Test Question Set 1

Inorganic Chemistry

Test Question Set 2

Physical Chemistry

Test question Set 3

Organic Chemistry

Social Counter