1
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which of the following ore is concentrated using group 1 cyanide salt ?
A
Sphalerite
B
Malachite
C
Siderite
D
Calamine
2
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the following reaction the reason why meta-nitro product also formed is :

JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Compounds Containing Nitrogen Question 141 English
A
–NH2 group is highly meta-directive
B
–NO2 substitution always takes place at meta-position
C
Formation of anilinium ion
D
low temperature
3
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the major product formed by HI on reaction with

JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 88 English
A
JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 88 English Option 1
B
JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 88 English Option 2
C
JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 88 English Option 3
D
JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Haloalkanes and Haloarenes Question 88 English Option 4
4
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Al2O3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X, Y and Z respectively are :
A
X = Na[Al(OH)4], Y = CO2, Z = Al2O3.xH2O
B
X = Al(OH)3, Y = CO2, Z = Al2O3
C
X = Al(OH)3, Y = SO2, Z = Al2O3.xH2O
D
X = Na[Al(OH)4], Y = SO2, Z = Al2O3
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