This chapter is currently out of syllabus
1
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The reaction that does NOT define calcination is :
A
2Cu2S + 3O2 $$\buildrel \Delta \over \longrightarrow $$ 2Cu2O + 2SO2
B
CaCO3 . MgCO3 $$\buildrel \Delta \over \longrightarrow $$ CaO + MgO + 2CO2
C
ZnCO3 $$\buildrel \Delta \over \longrightarrow $$ ZnO + CO2
D
Fe2O3 . XH2O $$\buildrel \Delta \over \longrightarrow $$ Fe2O3 + XH2O
2
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The amphoteric hydroxide is :
A
Ca(OH)2
B
Be(OH)2
C
Mg(OH)2
D
Sr(OH)2
3
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of :
A
ammoniated electrons
B
sodamide
C
sodium-ammonia complex
D
sodium ion-ammonia complex
4
JEE Main 2019 (Online) 10th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The metal used for marking X–ray tube window is :
A
Ca
B
Na
C
Mg
D
Be
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