1
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The correct match between item (I) and item (II) is :

Item-I Item-II
(A) Norethindrone (P) Anti-biotic
(B) Ofloxacin (Q) Anti-fertility
(C) Equanil
(R) Hypertension
(S) Analgesics
A
(A)$$ \to $$(R); (B)$$ \to $$(P); (C)$$ \to $$(R)
B
(A)$$ \to $$(R); (B)$$ \to $$(P); (C)$$ \to $$(S)
C
(A)$$ \to $$(Q); (B)$$ \to $$(P); (C)$$ \to $$(R)
D
(A)$$ \to $$(Q); (B)$$ \to $$(R); (C)$$ \to $$(S)
2
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the chemical reaction X $$\rightleftharpoons$$ Y, the standard reaction Gibbs energy depends on temperature T (in K) as $$\Delta $$rGo (in kJ mol–1) = 120 $$ - {3 \over 8}$$ T.

The major component of the reaction mixture at T is :
A
Y if T = 300 K
B
Y if T = 280 K
C
X if T = 350 K
D
X if T = 315 K
3
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A solid having density of 9$$ \times $$103 kg m–3 forms face centred cubic crystals of edge length $$200\sqrt 2 $$ pm. What is the molar mass of the solid?
[Avogadro constant $$ \cong $$ 6 $$ \times $$ 1023 mol–1 , $$\pi $$ $$ \cong $$ 3]
A
0.0305 kg mol–1
B
0.4320 kg mol–1
C
0.0216 kg mol–1
D
0.0432 kg mol–1
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for this purpose?

[RH = 1 $$ \times $$ 105 cm–1, h = 6.6 $$ \times $$ 10–34 Js, c = 3 $$ \times $$ 108 ms–1]
A
Balmer, $$\infty $$ $$ \to $$ 2
B
Paschen, 5 $$ \to $$ 3
C
Paschen, $$\infty $$ $$ \to $$ 3
D
Lyman, $$\infty $$ $$ \to $$ 1
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