1
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
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Out of Syllabus
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Which of the following is not a broad spectrum antibiotic?

A
Vancomycin
B
Ampicillin
C
Ofloxacin
D
Penicillin G
2
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

During the qualitative analysis of salt with cation y2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are :

A
Dimethylglyoxime and Ni2+
B
Dimethylglyoxime and Co2+
C
Nessler's reagent and Hg2+
D
Nessler's reagent and Ni2+
3
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
Out of Syllabus
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Atoms of element X form hcp lattice and those of element Y occupy $${2 \over 3}$$ of its tetrahedral voids. The percentage of element X in the lattice is ____________. (Nearest integer)

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4
JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
Change Language

2O3(g) $$\rightleftharpoons$$ 3O2(g)

At 300 K, ozone is fifty percent dissociated. The standard free energy change at this temperature and 1 atm pressure is ($$-$$) ____________ J mol$$-$$1. (Nearest integer)

[Given : ln 1.35 = 0.3 and R = 8.3 J K$$-$$1 mol$$-$$1]

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