This chapter is currently out of syllabus
1
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Two elements A and B have similar chemical properties. They don’t form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B, respectively, are :
A
Li and Mg
B
Cs and Ba
C
Na and Rb
D
Na and Ca
2
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The metal mainly used in devising photoelectric cells is :
A
Na
B
Rb
C
Li
D
Cs
3
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Among the statements (a)-(d) the correct ones are :

(a) Lithium has the highest hydration enthalpy among the alkali metals.

(b) Lithium chloride is insoluble in pyridine.

(c) Lithium cannot form ethynide upon its reaction with ethyne.

(d) Both lithium and magnesium react slowly with H2O.
A
(b) and (c) only
B
(a) and (d) only
C
(a), (b) and (d) only
D
(a), (c) and (d) only
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
When gypsum is heated to 393 K, it forms :
A
CaSO4 . 0.5H2O
B
CaSO4 . 5H2O
C
Dead burnt plaster
D
Anhydrous CaSO4
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