Chemistry Test 225

Result

Chemistry Test 225

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The actinoid exhibit more number of oxidation states in general than the lanthanides. This is because

A
The actinoids are more reactive than the lanthanoids.

B
The 5f orbitals extend further from the nucleus than the 4f orbitals.

C
The 5f orbitals are more buried than the 4f orbitals.

D
There is a similarity between 4f and 5f orbitals in their angular part of the wave function.

Solution

As the distance between the nucleus and 5f orbitals (actinides) is more than the distance between the nucleus and 4f orbitals (lanthanides) hence the hold of nucleus on valence electron decreases in actinides. For this reason the actinides exhibit more number of oxidation states in general.
Question 2
4 / -1

The successive ionisation energies in kJ mol⁻¹ of an element P are 740, 1500, 10500, 13600, 18000 and 21700. Which ion is the most likely to be formed when PP reacts with chloride?

A
P2⁻

B
P⁺

C
P²⁺

D
P³⁺

Solution

After losing two electrons, there is a sudden large increase in IE from 1500 to 10500 kJ mol⁻¹. It means that after losing two electrons, a stable configuration is achieved. So the element P forms a P²⁺ ion.
Question 3
4 / -1

The characteristic not associated with Planck's theory is

A
Radiations are associated with energy

B
The magnitude of energy associated with a quantum is proportional to frequency

C
Radiation energy is neither emitted nor absorbed continuously

D
Radiation energy is neither emitted nor absorbed discontinuously

Solution

According to planck's theory radiation energy is neither emitted nor absorbed continuously
Question 4
4 / -1

Which forms interstitial compounds?

A
Fe

B
Ni

C
Co

D
All of these

Solution

The transition metals form a large number of interstitial compounds in which small atoms like hydrogen, carbon, boron and nitrogen occupy interstitial sites in their lattices.
Question 5
4 / -1

Which one of the following elements has the highest ionisation energy?

A
[Ne]3s²3p¹

B
[Ne]3s²3p³

C
[Ne]3s²3p²

D
[Ar]3d¹⁰4s²4p²

Solution

[Ne]3s²3p³ is a stable configuration because the outer sub-shell is half-filled. Half filled configurations are stable configurations. Thus, this atom has extra stability.

The one half-filled and one completely filled orbital gives stability. Hence, It will be difficult to remove an electron from it and will take more energy.

Hence, [Ne]3s²3p³ has the highest ionization energy among the given elements.
Question 6
4 / -1

A substance forms zwitter ion. The functional groups present are

A
-NH₂, - COOH

B
-NH₂ , -SO₃H

C
Both (a) and (b)

D
None of these

Solution

The compounds having –NH₂ and−COOH(in aminoa acids) or−NH₂ and−SO₃H groups exist as Zwitter ion e.g.,
Question 7
4 / -1

Non-narcotic analgesics are:

A
Phenyl butazone

B
Morphine

C
Heroin

D
Ibuprofen

Solution

Ibuprofen is used to control pain and inflammation. Heroin is a narcotic analgesic used in the treatment of severe pain. Morphine belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. Phenylbutazone is used in the treatment of fever, headache, muscle pain and arthralgia. Phenylbutazone is a non-steroidal anti-inflammatory drugs (NSAID). It works by blocking the release of certain chemical messengers that cause pain and inflammation (redness and swelling).
Question 8
4 / -1

Which kind of isomerism is exhibited by octahedral complex [Co(NH₃)₄Br₂]Cl?

A
Geometrical and ionization

B
Geometrical only

C
Geometrical and optical

D
Optical and ionisation

Solution

Br , ClBr , Cl Can be inter changed resulting in ionization isomerism. It can show cis-trans isomerism as two similar ligands can be kept opposite as well as adjacent to each other.
Question 9
4 / -1

Which of the following is not a property of hydrophilic sols?

A
High concentration of dispersed phase can be easily attained

B
Coagulation is reversible

C
Viscosity and surface tension are nearly same as that of water

D
The charge of the particle depends on the pH value of medium; it may be positive, negative, or even zero

Solution

Surface tension of hydrophilic sols are usually lower than water and viscosity of the hydrophilic sols are much higher than dispersion medium (water).
Question 10
4 / -1

Phenol on distillation with zinc dust gives

A
C₆H₆

B
C₆H₁₂

C
C₆H₅OC₆H₅

D
C₆H₅−C₆H,

Solution

When phenol is heated with Zn dust, the reduction of phenol occurs and it gets converted into benzene with ZnO as a by-product.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Chemistry Test 225

Result

Chemistry Test 225

Score

-

Rank

-

SHARING IS CARING

Question 1

The actinoids are more reactive than the lanthanoids.

The 5f orbitals extend further from the nucleus than the 4f orbitals.

The 5f orbitals are more buried than the 4f orbitals.

There is a similarity between 4f and 5f orbitals in their angular part of the wave function.

Solution

Question 2

P2−

P+

P2+

P3+

Solution

Question 3

Radiations are associated with energy

The magnitude of energy associated with a quantum is proportional to frequency

Radiation energy is neither emitted nor absorbed continuously

Radiation energy is neither emitted nor absorbed discontinuously

Solution

Question 4

Fe

Ni

Co

All of these

Solution

Question 5

[Ne]3s23p1

[Ne]3s23p3

[Ne]3s23p2

[Ar]3d104s24p2

Solution

Question 6

-NH2, - COOH

-NH2 , -SO3H

Both (a) and (b)

None of these

Solution

Question 7

Phenyl butazone

Morphine

Heroin

Ibuprofen

Solution

Question 8

Geometrical and ionization

Geometrical only

Geometrical and optical

Optical and ionisation

Solution

Question 9

High concentration of dispersed phase can be easily attained

Coagulation is reversible

Viscosity and surface tension are nearly same as that of water

The charge of the particle depends on the pH value of medium; it may be positive, negative, or even zero

Solution

Question 10

C6H6

C6H12

C6H5OC6H5

C6H5−C6H,

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

P2⁻

P⁺

P²⁺

P³⁺

[Ne]3s²3p¹

[Ne]3s²3p³

[Ne]3s²3p²

[Ar]3d¹⁰4s²4p²

-NH₂, - COOH

-NH₂ , -SO₃H

C₆H₆

C₆H₁₂

C₆H₅OC₆H₅

C₆H₅−C₆H,