Physical Chemistry
Some Basic Concepts of Chemistry
MCQ (Single Correct Answer)
Chemical Equilibrium
MCQ (Single Correct Answer)
Inorganic Chemistry
Periodic Table and Periodicity
MCQ (Single Correct Answer)
Chemical Bonding and Molecular Structure
MCQ (Single Correct Answer)
Hydrogen and It's Compounds
MCQ (Single Correct Answer)
d and f Block Elements
MCQ (Single Correct Answer)
Coordination Compounds
MCQ (Single Correct Answer)
Environmental Chemistry
MCQ (Single Correct Answer)
Organic Chemistry
IUPAC Nomenclatures
MCQ (Single Correct Answer)
General Organic Chemistry
MCQ (Single Correct Answer)
Haloalkanes and Haloarenes
MCQ (Single Correct Answer)
Alcohol, Phenols and Ethers
MCQ (Single Correct Answer)
Aldehyde and Ketone
MCQ (Single Correct Answer)
Carboxylic Acids and Its Derivatives
MCQ (Single Correct Answer)
Compounds Containing Nitrogen
MCQ (Single Correct Answer)
Chemistry in Everyday Life
MCQ (Single Correct Answer)
Practical Organic Chemistry
MCQ (Single Correct Answer)
1
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

Given are $$\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_3 \mathrm{PO}_3, \mathrm{H}_3 \mathrm{PO}_4$$ and $$\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7$$. Which of the above oxacids results into two series of salts?

A
$$\mathrm{H}_3 \mathrm{PO}_2$$
B
$$\mathrm{H}_3 \mathrm{PO}_3$$
C
$$\mathrm{H}_3 \mathrm{PO}_4$$
D
$$\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

The order of acidic strength of boron trihalides is

A
$$\mathrm{BI}_3<\mathrm{BBr}_3<\mathrm{BCl}_3<\mathrm{BF}_3$$
B
$$\mathrm{BF}_3<\mathrm{BCl}_3<\mathrm{BBr}_3<\mathrm{BI}_3$$
C
$$\mathrm{BBr}_3<\mathrm{BCl}_3<\mathrm{BF}_3<\mathrm{BI}_3$$
D
$$\mathrm{BCl}_3<\mathrm{BBr}_3<\mathrm{BI}_3<\mathrm{BF}_3$$
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

Give the correct order of acidity of

A
HClO$$_4$$ < HClO$$_3$$ < HClO$$_2$$ < HClO
B
HClO < HClO$$_2$$ < HClO$$_3$$ < HClO$$_4$$
C
HClO$$_4$$ < HClO$$_2$$ < HClO < HClO$$_3$$
D
HClO < HClO$$_3$$ < HClO$$_2$$ < HClO$$_4$$
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

The cololur of CrO$$_4^{2-}$$ changes to Cr$$_2$$O$$_7^{2-}$$ is

A
yellow to orange
B
orange to yellow
C
yellow to blue
D
orange to blue
COMEDK Subjects