1
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Among the reactions (a) - (d), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are :
(a) CaO + SiO2 $$ \to $$ CaSiO3
(b) 3Fe2O3 + CO $$ \to $$ 2Fe3O4 + CO2
(c) FeO + SiO2 $$ \to $$ FeSiO3
(d) FeO $$ \to $$ Fe + $${{1 \over 2}}$$O2
A
(a) and (d)
B
(c) and (d)
C
(a)
D
(d)
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An unsaturated hydrocarbon X absorbs two hydrogen molecules on catalytic hydrogenation and also gives following reaction : JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English B(3 - oxo - hexanedicarboxylic acid) X will be :-
A
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English Option 1
B
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English Option 2
C
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English Option 3
D
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English Option 4
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Among the compounds A and B with molecular formula C9H18O3 , A is having higher boiling point the B. The possible structures of A and B are :
A
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Alcohols, Phenols and Ethers Question 103 English Option 1
B
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Alcohols, Phenols and Ethers Question 103 English Option 2
C
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Alcohols, Phenols and Ethers Question 103 English Option 3
D
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Alcohols, Phenols and Ethers Question 103 English Option 4
4
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds?
A
C6H5NH2
B
$${\rm{N}}{{\rm{H}}_2} - \mathop C\limits^{\mathop \parallel \limits^O } - {\rm{N}}{{\rm{H}}_2}$$
C
C6H5NO2
D
CH3CH2-C $$ \equiv $$ N
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