1
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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What is the purpose of adding gypsum to cement?

A
To facilitate the hydration of cement
B
To speed up the process of setting
C
To give a hard mass
D
To slow down the process of setting
2
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The water gas on reacting with cobalt as a catalyst forms

A
Methanoic acid
B
Methanol
C
Methanal
D
Ethanol
3
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the following represent the Freundlich adsorption isotherms?

JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Surface Chemistry Question 4 English 1JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Surface Chemistry Question 4 English 2

Choose the correct answer from the options given below:

A
B, C, D only
B
A, B only
C
A, B, D only
D
A, C, D only
4
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Choose the halogen which is most reactive towards $$\mathrm{S}_{\mathrm{N}} 1$$ reaction in the given compounds (A, B, C & D)

JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 16 English

A
$$\mathrm{A}-\mathrm{Br}_{(\mathrm{b})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$$
B
$$\mathrm{A}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$$
C
$$\mathrm{A}-\mathrm{Br}_{(b)} ; \mathrm{B}-\mathrm{I}_{(b)} ; \mathrm{C}-\mathrm{Br}_{(b)} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{b})}$$
D
$$\mathrm{A}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(b)} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$$
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