1
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The number(s) of $$-\mathrm{OH}$$ group(s) present in $$\mathrm{H}_3 \mathrm{PO}_3$$ and $$\mathrm{H}_3 \mathrm{PO}_4$$ is/are

A
3 and 3 respectively
B
3 and 4 respectively
C
2 and 3 respectively
D
1 and 3 respectively
2
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The correct order of acidity of the following hydra acids is

A
HF > HCl > HBr > HI
B
HF < HCl < HBr < HI
C
HF < HCl > HBr > HI
D
HF > HCl < HBr > HI
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Cyclo [18] carbon is an allotrope of carbon with molecular formula C18. It is a ring of 18 carbon atoms, connected by single and triple bonds. The total number of triple bonds present in this cyclocarbon are
A
9
B
10
C
12
D
6
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Cl2O7 is the anhydride of
A
HOCl
B
HClO2
C
HClO3
D
HClO4
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