1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
A
6p > 5f > 4d > 5p
B
5f > 6p > 4d > 5p
C
5f > 6p > 5p > 4d
D
6p > 5f > 5p > 4d
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
For the second period elements the correct increasing order of first ionization enthalpy is :
A
Li < B < Be < C < N < O < F < Ne
B
Li < Be < B < C < O < N < F < Ne
C
Li < B < Be < C < O < N < F < Ne
D
Li < Be < B < C < N < O < F < Ne
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
The number of sigma ($$\sigma $$) and pi ($$\pi $$) bonds in pent-2-en-4-yne is -
A
11 $$\sigma $$ bonds and 2 $$\pi $$ bonds
B
13 $$\sigma $$ bonds and no $$\pi $$ bonds
C
10 $$\sigma $$ bonds and 3 $$\pi $$ bonds
D
8 $$\sigma $$ bonds and 5 $$\pi $$ bonds
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
The manganate and permanganate ions are tetrahedral due to :
A
The $$\pi $$-bonding involves overlap of p-orbitals of oxygen with p-orbtials of manganese
B
The $$\pi $$-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
C
The $$\pi $$-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
D
There is no $$\pi $$-bonding
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