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1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The correct order of hydration enthalpies is

(A) K$$^+$$

(B) Rb$$^+$$

(C) Mg$$^{2+}$$

(D) Cs$$^+$$

(E) Ca$$^{2+}$$

Choose the correct answer from the options given below :

A
E > C > A > B > D
B
C > A > E > B > D
C
C > E > A > D > B
D
C > E > A > B > D
2
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which one among the following metals is the weakest reducing agent?

A
K
B
Na
C
Li
D
Rb
3
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the following represents the correct order of metallic character of the given elements?

A
K < Mg < Be < Si
B
Si < Be < Mg < K
C
Be < Si < Mg < K
D
Be < Si < K < Mg
4
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : The alkali metals and their salts impart characteristic colour to reducing flame.

Reason R : Alkali metals can be detected using flame tests.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
A is not correct but R is correct
B
A is correct but R is not correct
C
Both A and R are correct and R is the correct explanation of A
D
Both A and R are correct but R is NOT the correct explanation of A
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