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 Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Cast iron is used for the manufacture of :
A
wrought iron, pig iron and steel
B
wrought iron and pig iron
C
wrought iron and steel
D
pig iron, scrap iron and steel
3
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the reaction sequence given below: JEE Main 2020 (Online) 2nd September Evening Slot Chemistry - Haloalkanes and Haloarenes Question 87 English
Which of the following statements is true?
A
Changing the concentration of base will have no effect on reaction (1)
B
Changing the concentration of base will have no effect on reaction (2)
C
Changing the base from OH- to -OR will have no effect on reaction (2)
D
Doubling the concentration of base will double the rate of both the reactions
4
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The number of subshells associated with n = 4 and m = –2 quantum numbers is
A
8
B
2
C
16
D
4
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