1
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match the ores (column A) with the metals (column B) :

(Column A) ores (Column B) Metals
(I) Siderite (a) Zinc
(II) Kaolinite (b) Copper
(III) Malachite (c) Iron
(IV) Calamine (d) Aluminium
A
(I)-(c); (II)-(d); (III)-(b); (IV)-(a)
B
(I)-(a); (II)-(b); (III)-(c); (IV)-(d)
C
(I)-(b); (II)-(c); (III)-(d); (IV)-(a)
D
(I)-(c); (II)-(d); (III)-(a); (IV)-(b)
2
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
NaH is an example of :
A
metallic hydride
B
saline hydride
C
electron-rich hydrid
D
molecular hydride
3
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
An example of solid sol is :
A
Butter
B
Hair cream
C
Gem stones
D
Paint
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the reaction
N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g)

The equilibrium constant of the above reaction is Kp. If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by (Assume that PNH3 << Ptotal at equilibrium)
A
$${{{3^{{3 \over 2}}}{K_P^{{1 \over 2}}}{P^2}} \over 4}$$
B
$${{K_P^{{1 \over 2}}{P^2}} \over 4}$$
C
$${{{3^{{3 \over 2}}}{K_P^{{1 \over 2}}}{P^2}} \over 16}$$
D
$${{K_P^{{1 \over 2}}{P^2}} \over 16}$$
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