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Test: General Properties of d-Block Elements - NEET MCQ


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25 Questions MCQ Test Chemistry Class 12 - Test: General Properties of d-Block Elements

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Test: General Properties of d-Block Elements - Question 1

Only One Option Correct Type

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

Atomic number of second transition series lies from

Detailed Solution for Test: General Properties of d-Block Elements - Question 1

Since,1st transition series belongs to 3d orbital and 2nd transition series belongs to 4d-orbital. According to the given option, atomic number 39 to 48 (5s24d1-10) belongs to second transition series.

Test: General Properties of d-Block Elements - Question 2

Which has lower standard reduction potential (SRP) value?

Detailed Solution for Test: General Properties of d-Block Elements - Question 2

Mn2+/ Mn have - 1.18SRPvalue.

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Test: General Properties of d-Block Elements - Question 3

An element has configuration 4d55s2. The element belongs to

Detailed Solution for Test: General Properties of d-Block Elements - Question 3

Ford-block elements, group number is equal to the number of electrons in (n - 1)d subshell + number of electrons in valence shell (nth shell).

Test: General Properties of d-Block Elements - Question 4

The electronic configuration of palladium is

Detailed Solution for Test: General Properties of d-Block Elements - Question 4

[Kr]4d105s0

Test: General Properties of d-Block Elements - Question 5

Which has lowest and highest first ionisation enthalpy in 3d series?

Detailed Solution for Test: General Properties of d-Block Elements - Question 5

Sc (3d4s2)has 631 kJ mol-1 and Zn (3d10 4s2) has 906 kJ mol-1 

Test: General Properties of d-Block Elements - Question 6

The electronic configuration of the element which is just above the element with atomic number 42 in the same group

Detailed Solution for Test: General Properties of d-Block Elements - Question 6

The element lying above Z = 42 has Z value 24, i.e. chromium. Hence, Cr configuration is [Ar]3d54s1

Test: General Properties of d-Block Elements - Question 7

Which one of the following exists in the oxidation state other than +3?

Detailed Solution for Test: General Properties of d-Block Elements - Question 7

The correct answer is option C

Ce exist in the oxidation state other than +3 .

 

(a) B - Boron has +1 and +3 oxidation state.

(b) Al - Aluminium has +1,+2 and +3 oxidation state.

(c) Ce - Cerium has +3 and +4 oxidation state.

(d) Ga - Gallium has +1 and +3 oxidation state.

Cerium (Ce) have [Xe] 4f²6s² electronic configuration.

Test: General Properties of d-Block Elements - Question 8

Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?

Detailed Solution for Test: General Properties of d-Block Elements - Question 8

Fe (Z = 26) in + 3 oxidation state show Fe3+ ([Ar] 3d5) configuration. Ni(28) in +2 oxidation state show Ni2+([Ar]3d8) configuration.

Test: General Properties of d-Block Elements - Question 9

The atomic radii of Cu and Ag are 1.17 Å and 1.34 Å. The atomic radius of gold is expected to be

Detailed Solution for Test: General Properties of d-Block Elements - Question 9

Due to lanthanide contraction, Ag and Au have nearly same size.

Test: General Properties of d-Block Elements - Question 10

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is  

Detailed Solution for Test: General Properties of d-Block Elements - Question 10

*Multiple options can be correct
Test: General Properties of d-Block Elements - Question 11

One or More than One Options Correct Type

Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. Identify the pairs in which one covalent radii of elements are almost similar.

Detailed Solution for Test: General Properties of d-Block Elements - Question 11

Covalent radii tend to increase across a period from left to right and increase down a group in the periodic table. Elements that are close to each other in the periodic table are likely to have similar covalent radii.

Let's analyze each pair:

  1. Nb (Niobium) and Ta (Tantalum):

    • Nb: Atomic number 41, Period 5, Group 5.
    • Ta: Atomic number 73, Period 6, Group 5.
    • These elements are in the same group and have similar atomic sizes. Therefore, their covalent radii are expected to be similar. (Correct)
  2. Mo (Molybdenum) and W (Tungsten):

    • Mo: Atomic number 42, Period 5, Group 6.
    • W: Atomic number 74, Period 6, Group 6.
    • Similar reasoning as Nb and Ta, they are in the same group and likely have similar covalent radii. (Correct)
  3. La (Lanthanum) and Lu (Lutetium):

    • La: Atomic number 57, Period 6, Group 3.
    • Lu: Atomic number 71, Period 6, Group 3.
    • These elements are in the same group but not directly next to each other in the periodic table. Their covalent radii may be similar but not as closely as within the same period or adjacent groups.
  4. Sc (Scandium) and Y (Yttrium):

    • Sc: Atomic number 21, Period 4, Group 3.
    • Y: Atomic number 39, Period 5, Group 3.
    • These elements are in the same group but not in the same period. Their covalent radii may show some similarity due to being in the same group.

Based on the analysis:

  • Option 1 (Nb and Ta) and Option 2 (Mo and W) are correct because these pairs are in the same group and are expected to have similar covalent radii.

Therefore, the correct answers are:

1. Nb and Ta

2. Mo and W

Test: General Properties of d-Block Elements - Question 12

Which one is of the following is the lightest transition element?

Detailed Solution for Test: General Properties of d-Block Elements - Question 12

The correct answer is Option B.

Sc has the lowest density (3.1 g cm−3). It is the lightest transition element.

*Multiple options can be correct
Test: General Properties of d-Block Elements - Question 13

Which of the following have pseudo noble gas configuration?

Detailed Solution for Test: General Properties of d-Block Elements - Question 13

An element with pseudo noble gas configuration has 18 electrons in the highest energy level instead of 8.
Zn2+(28) = 3s2, 3p6, 3d10
Ag+ (46) = 4s24p64d10

*Multiple options can be correct
Test: General Properties of d-Block Elements - Question 14

Which one of the following is a diamagnetic ion?

Detailed Solution for Test: General Properties of d-Block Elements - Question 14

The correct answer is option A,D.
About two–thirds of all metals crystallize in closest-packed arrays with coordination numbers of 12. Metals that crystallize in an HCP structure include Cd, Co, Li, Mg, Na, and Zn, and metals that crystallize in a CCP structure include Ag, Al, Ca, Cu, Ni, Pb, and Pt.

*Multiple options can be correct
Test: General Properties of d-Block Elements - Question 15

The pair of ions that have same electronic configuration

Detailed Solution for Test: General Properties of d-Block Elements - Question 15

Both Fe2+ and Co3+ have [Ar] 3d6 configuration while V2+ and Cr3+ have [Ar] 3d3.

Test: General Properties of d-Block Elements - Question 16

Comprehension Type

Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

The atomic and ionic radii for transition elements are smaller than their corresponding s-block elements and are greater than their corresponding p-block elements. The atomic and ionic radii transition elements for a given series show decreasing trend for first elements constant in the middle and slight increase towards the end. This is due to the combined effect of increasing effective nuclear charge and increasing screening effect along the period.
The atomic and ionic radii of 4d series are greater than 3d series. However, the elements of 4d series and 5d series have almost similar sizes due to lanthanide contraction. Transition elements have low atomic volumes, high densities, high melting points.

Q. 

Which pair of elements has nearly same atomic size? 

Detailed Solution for Test: General Properties of d-Block Elements - Question 16

Due to lanthanide contraction.

Test: General Properties of d-Block Elements - Question 17

Passage

The atomic and ionic radii for transition elements are smaller than their corresponding s-block elements and are greater than their corresponding p-block elements. The atomic and ionic radii transition elements for a given series show decreasing trend for first elements constant in the middle and slight increase towards the end. This is due to the combined effect of increasing effective nuclear charge and increasing screening effect along the period.
The atomic and ionic radii of 4d series are greater than 3d series. However, the elements of 4d series and 5d series have almost similar sizes due to lanthanide contraction. Transition elements have low atomic volumes, high densities, high melting points.

Q. 

The metal with high melting point in 3d series is

Detailed Solution for Test: General Properties of d-Block Elements - Question 17

The high melting point of Cr metal is attributed to the involvement of greater number of electrons from (n - 1) d in addition to ns electrons in the interatomic metallic bonding.

Test: General Properties of d-Block Elements - Question 18

Matching List Type

Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q. 

Match the Column I with Column II and mark the correct option from codes given below.

Detailed Solution for Test: General Properties of d-Block Elements - Question 18

(i) → (s), (ii) → (r), (iii) → (q), (iv) → (p)

Test: General Properties of d-Block Elements - Question 19

Which one of the following ions exhibits colour in aqueous solution

Detailed Solution for Test: General Properties of d-Block Elements - Question 19


*Answer can only contain numeric values
Test: General Properties of d-Block Elements - Question 20

One Integer Value Correct Type

Direction (Q. Nos. 20-23) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

Q. 

The number of elements that do not have completely filled d subshell among the elements Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd and Hg are


Detailed Solution for Test: General Properties of d-Block Elements - Question 20

Ni has 3d84s2 and Pt has 5d96s1.

*Answer can only contain numeric values
Test: General Properties of d-Block Elements - Question 21

Total spin of the electrons in a chromium atom is


Detailed Solution for Test: General Properties of d-Block Elements - Question 21

Chromium has 6 unpaired electrons and hence, its spin value is - 3 or +3. Cr,

There are 6 unpaired electrons in chromium.

*Answer can only contain numeric values
Test: General Properties of d-Block Elements - Question 22

Number of electrons with l = 2 and s = 1/2 in zinc atom are


Detailed Solution for Test: General Properties of d-Block Elements - Question 22

l = 2 means d-subshell. Zinc has 10 electrons ind-subshell in which 5 electrons are + 1/2 spin and 5 electrons are - 1/2.

*Answer can only contain numeric values
Test: General Properties of d-Block Elements - Question 23

Number of elements that generally do not show variable valencies Cu, Zn Au, Cd, Sc, La, Pt, Co.


Detailed Solution for Test: General Properties of d-Block Elements - Question 23

Zn, Cd, Sc and La do not show variable valencies.

Test: General Properties of d-Block Elements - Question 24

During the process of electrolytic refining of copper, some metals present as impurity settle as ‘anode mud’ These are

Detailed Solution for Test: General Properties of d-Block Elements - Question 24

The correct answer is option C
In Electrolytic refining, the impure metal is made to act as an anode. A strip of the same metal in pure form is used as a cathode. 
They are put in a suitable electrolytic bath containing a soluble salt of the same metal. 
The more basic metal remains in the solution and the less basic ones go to the anode mud.
Copper is refined using an electrolytic method.
Impurities from the blister copper deposit as anode mud which contains antimony, selenium, tellurium, silver, gold, and platinum; recovery of these elements may meet the cost of refining.

Test: General Properties of d-Block Elements - Question 25

Statement Type

Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q. 

Statement I : The highest oxidation state of osmium is +8.

Statement II : Osmium is a 5-d block element.

Detailed Solution for Test: General Properties of d-Block Elements - Question 25

Osmium has the electronic configuration 5de6s2. As 5d and 6s are close in energy, all the 8 electron can participate in bonding. highest oxidation state of osmium is +8 due to its ability to expand their octet by using its all 8 electrons (2 from 6s and 6 from 5d).

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