1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following pairs of ions in iso-electronic and iso-structural?

A
CO$$_3^{2-}$$, NO$$_3^{-}$$
B
SO$$_3^{2-}$$, NO$$_3^{-}$$
C
ClO$$_3^{-}$$, CO$$_3^{2-}$$
D
SO$$_3^{2-}$$, CO$$_3^{2-}$$
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Find the compound which have both polar and non-polar covalent bonds.

A
HCN
B
H$$_2$$O$$_2$$
C
NH$$_4$$Cl
D
CH$$_4$$
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

In acetylene molecule, between the carbon atoms there are

A
three $$\sigma$$-bonds
B
two $$\sigma$$ and one $$\pi$$-bond
C
one $$\sigma$$ and two $$\pi$$-bonds
D
three $$\pi$$-bonds
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

During the formation of a chemical bond

A
energy decreases
B
energy increases
C
energy of the system does not change
D
electron-electron repulsion becomes more than the nucleus-electron attraction
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