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MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - JEE MCQ


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21 Questions MCQ Test - MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2)

MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) for JEE 2024 is part of JEE preparation. The MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) questions and answers have been prepared according to the JEE exam syllabus.The MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) below.
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MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 1
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Moving from right to left in a periodic table, the atomic size is :               [JEE 1995]

Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 1
When we moved left to right then size decreases because no of electron outermost orbital increased then size decrease question is right to left then answer is increase.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 2
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The increasing order of electronegativity in the following elements : 

[JEE 1995]

Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 2
Electronegativity increases from left to right
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MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 3
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One element has atomic weight 39. Its electronic configuration is 1 s2, 2s2, 2p6, 3s2, 3p6, 4s1. The true statement for that element is : [JEE 1995]

Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 3
Isotones are compound with same nutron number In the provided config and atomic mass and mass number difference is 20 same as in.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 4
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An element belongs to period 2 and group 2 th number of valence electrons in the atoms of this element is.        
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 5
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The decreasing size of K+, Ca2+, Cl- & S2- follows the order :   [REE 1995]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 5
More the number of electrons, bigger is the size. We know that negative sign means that electron has been gained or there are extra electrons present. So, size increases with increase in negative charge on the atom and size decreases with increase in the positive charge on the atom. S^ -2 has 2 more electrons and thus will be largest of them all. Similarly for Cl which will be greater than k+> Ca+2 thus, correct option is D.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 6
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Which of the following oxide is neutral ?             [JEE 1996]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 6
Carbon monoxide is slightly acidic in nature as it reacts with concentrated sodium hydroxide solution. But as it doesn't react with water it is considered as a neutral oxide.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 7
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Which of the following has the maximum number of unpaired electrons              

[JEE 1996]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 7
Fe^2+  has 1s^2,2s^2 2p^6,3s^2 3p^6 3d^6 configuration with 4 unpaired electron.
Hence (d) is the correct answer.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 8
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The following acids have been arranged in the order of decreasing acid strength. Identify the correct order

[JEE 1996]

(I) ClOH

(II) BrOH

(III) IOH
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 9
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 The incorrect statement among the following is :                    [JEE 1997]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 9
(a) Correct statement : In a period, element of 2ndgroup ahs higher first ionization potential than element group of 13. 
(b) Incorrect statement : Mg+ required less energy for further ionization than Na+ because of noble gas configuration of Na+. 
(c) Correct statement : Ionization energy increases from left to right in a period. 
(d) Correct statement : Mg2+ has noble gas configuration, require greater energy for further ionization than Na2+.
*Multiple options can be correct
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 10
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Which of the following are amphoteric ?              

[REE 1997]
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 11
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 Identify the wrong sequence of the elements in a group        
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 12
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Anhydrous AlCl3 is covalent. From the data given below predict whether it would remain as a molecule or converts into ions in aqueous solution.                                                                        [JEE 1997]

[L.E. for AlCl3 = 5137 kJ/mol]

ΔH hydration for Al3+ = -4665 kJ/mol;

ΔHhydra for Cl- = -381 kJ/mol.

*Multiple options can be correct
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 13
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Which one of the following statement (s) is (are) correct ?
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 13
Option A is correct because Cr gets stability due to half filled d and s orbitals , as we know that we get magnetic quantum numbers according to the value of azimuthal quantum number , for eg: if l(azimuthal) quantum number is 1 then magnetic quantum numbers will be -1,0,+1. We get C option correct by MOT. Hope you understand.
*Multiple options can be correct
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 14
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Assertion : F atom has less negative electron gain enthalpy than Cl atom                 [JEE 2000]

Reason : Additional electron is repelled more efficiently by 3p electron in Cl atom than by 2p electron in F atom.
*Multiple options can be correct
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 15
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Assertion : Al(OH)3 is amphoteric in nature.

Reason : Al - O and O - H bonds can be broken with equal case in Al(OH)3                [JEE 2000]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 15
Al(OH)3 forms water soluble complex Al(OH)4_ taking OH- from base OH- ions of Al(OH)3 reacts with H+ of acid to form H2O. so Al(OH)3 is amphoteric.
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 16
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The correct order of radii is :                                [JEE 2000]
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 17
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The correct order of acidic strength is :                   [JEE 2000]
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 18
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In the third period of the periodic table the element having smallest size is        
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 19
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 The set representing correct order of IP1 is                [JEE 2001]
Detailed Solution for MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 19
K > Na > Li : Incorrect, since ionization energy decreases down the group with increase in size. These elements belong to  same group (1st). The correct order of first ionization energy should be: K < Na < Li.



Be > Mg > Ca : Correct. These are 2nd group 
...

MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 20
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Identify the least stable ion amongst the following :                      [JEE 2002]
MCQ (Previous Year Questions) - Classification Of Elements & Periodicity In Properties (Level 2) - Question 21
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Identify the correct order of acidic strengths of CO2, CuO, CaO, H2O :

 [JEE 2002]
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