This chapter is currently out of syllabus
1
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Match the following compounds (Column-I) with their uses (Column-II) :

S.No. Column-I S.No. Column-II
(I) Ca(OH)2 (A) casts of statues
(II) NaCl (B) white wash
(III) CaSO4, $${1 \over 2}$$H2O (C) antacid
(IV) CaCO3 (D) washing soda
preparation
A
(I)-(B), (II)-(C), (III)-(D), (IV)-(A)
B
(I)-(B), (II)-(D), (III)-(A), (IV)-(C)
C
(I)-(C), (II)-(D), (III)-(B), (IV)-(A)
D
(I)-(D), (II)-(A), (III)-(C), (IV)-(B)
2
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Among the sulphates of alkaline earth metals, the solubilities of BeSO4 and MgSO4 in water, respectively, are :
A
poor and poor
B
poor and high
C
high and poor
D
high and high
3
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
An alkaline earth metal ‘M’ readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is :
A
Ca
B
Mg
C
Sr
D
Be
4
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are :
A
Li2O, Na2O2 and K2O
B
Li2O2, Na2O2 and K2O2
C
Li2O, Na2O2 and KO2
D
Li2O, Na2O and K2O2
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