1
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting
[3Ca3 (PO4)2.Ca(OH)2] to
A
[3{Ca(OH)2}. CaF2]
B
[CaF2]
C
[3(CaF2). Ca(OH)2]
D
[3Ca3(PO4)2. CaF2]
2
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following compounds will be suitable for Kjeldahl’s method for nitrogen estimation?
A
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 84 English Option 1
B
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 84 English Option 2
C
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 84 English Option 3
D
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 84 English Option 4
3
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The major product of the following reaction is: JEE Main 2018 (Offline) Chemistry - Haloalkanes and Haloarenes Question 125 English
A
JEE Main 2018 (Offline) Chemistry - Haloalkanes and Haloarenes Question 125 English Option 1
B
JEE Main 2018 (Offline) Chemistry - Haloalkanes and Haloarenes Question 125 English Option 2
C
JEE Main 2018 (Offline) Chemistry - Haloalkanes and Haloarenes Question 125 English Option 3
D
JEE Main 2018 (Offline) Chemistry - Haloalkanes and Haloarenes Question 125 English Option 4
4
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The trans-alkenes are formed by the reduction of alkynes with
A
Sn - HCl
B
H2 – Pd/C, BaSO4
C
NaBH4
D
Na/liq. NH3
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