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JEE Exam  >  JEE Tests  >  d – and f – Block Elements - 1 - JEE MCQ

d – and f – Block Elements - 1 - JEE MCQ


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30 Questions MCQ Test - d – and f – Block Elements - 1

d – and f – Block Elements - 1 for JEE 2024 is part of JEE preparation. The d – and f – Block Elements - 1 questions and answers have been prepared according to the JEE exam syllabus.The d – and f – Block Elements - 1 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for d – and f – Block Elements - 1 below.
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d – and f – Block Elements - 1 - Question 1
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What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid -

[AIEEE-03]

Detailed Solution for d – and f – Block Elements - 1 - Question 1

The correct answer is Option B.
 
A solution of potassium chromate, when treated with an excess of dilute nitric acid doesn't oxidize nitric acid as N is already present in its maximum oxidation state (+5). The products formed are Cr2O72- and H2O.

d – and f – Block Elements - 1 - Question 2
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 Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statements is incorrect for this reaction -

[AIEEE-04]

Detailed Solution for d – and f – Block Elements - 1 - Question 2

The correct answer is option B
It is given that an excess of KI reacts with CuSO4​ solution and then Na2​S2​O3​ is added to it. This is hypo test and reactions are as follows:
2CuSO4​ + 4KI → 2K2​SO4 ​+ 2CuI+I2​
2Na2​S2​O3​ + I2​→ Na2​S4​O6 ​+ 2NaI
CuI2​ is not formed according to the following reaction.
2CuI2​(unstable) → 2CuI+I2​
Hence, the statement in option B is incorrect.
 

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d – and f – Block Elements - 1 - Question 3
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Calomel on reaction with NH4OH gives –

[AIEEE-04]

Detailed Solution for d – and f – Block Elements - 1 - Question 3

The correct answer is option A
When calomel (Hg2​Cl2​) reacts with NH4​OH solution, the compound formed is [HgO.Hg(NH2​)Cl]. It is black in colour.
Hg2​Cl2​+2NH4​OH→[HgO.Hg(NH2​)Cl]↓+NH4​Cl+2H2​O

d – and f – Block Elements - 1 - Question 4
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Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect ?

[AIEEE-09]
Detailed Solution for d – and f – Block Elements - 1 - Question 4

The correct answer is option  B
Ln(III) compounds are coloured due to the f−f transitions in the lanthanide but the colour is fainter as compared to the d−d transitions in transition metals.
 

d – and f – Block Elements - 1 - Question 5
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Iron exhibits + 2 and +3 oxidation states. Which of the following statements about iron is incorrect?

 [AIEEE-2012]
Detailed Solution for d – and f – Block Elements - 1 - Question 5

The correct answer is Option D.

Ferrous oxide is more basic in nature than ferric oxide. Ferrous compounds are relatively more ionic than the corresponding ferric compounds. Ferrous compounds are less volatile than the corresponding ferric compounds as ferrous compounds are more ionic. 
 
But ferric compounds are more easily hydrolyzed than the corresponding ferrous compounds due to their more positive charge.
 

d – and f – Block Elements - 1 - Question 6
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d – and f – Block Elements - 1 - Question 9
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d – and f – Block Elements - 1 - Question 10
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The lanthanide ion that would show colour is -
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d – and f – Block Elements - 1 - Question 11
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d – and f – Block Elements - 1 - Question 12
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d – and f – Block Elements - 1 - Question 15
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d – and f – Block Elements - 1 - Question 16
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d – and f – Block Elements - 1 - Question 23
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d – and f – Block Elements - 1 - Question 28
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d – and f – Block Elements - 1 - Question 29
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