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1
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List-I with List-II

List-I
(Metal)		 List-II
(Emitted light wavelength (nm))
(A) Li (I) 670.8
(B) Na (II) 589.2
(C) Rb (III) 780.0
(D) Cs (IV) 455.5

Choose the most appropriate answer from the options given below :

A
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
B
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
C
(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
D
(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
2
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Addition of H2SO4 to BaO2 produces :

A
BaO, SO2 and H2O
B
BaHSO4 and O2
C
BaSO4, H2 and O2
D
BaSO4 and H2O2
3
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

BeCl2 reacts with LiAlH4 to give :

A
Be + Li[AlCl4] + H2
B
Be + AlH3 + LiCl + HCl
C
BeH2 + LiCl + AlCl3
D
BeH2 + Li[AlCl4]
4
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

s-block element which cannot be qualitatively confirmed by the flame test is :

A
Li
B
Na
C
Rb
D
Be
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