1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J]
A
25 J
B
30 J
C
-30 J
D
5 kJ
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following reactions are disproportionation reaction?

(a) 2Cu+ $$ \to $$ Cu2+ + Cu0
(b) 3MnO42- + 4H+ $$ \to $$ 2MnO4- + MnO2 + 2H2O
(c) 2KMnO4 $$\buildrel \Delta \over \longrightarrow $$ K2MnO4 + MnO2 + O2
(d) 2MnO4- + 3Mn2+ + 2H2O $$ \to $$ 5MnO2 + 4$${H^ \oplus }$$

Select the correct option from the following :
A
(a), (c) and (d)
B
(a) and (b) only
C
(a) and (d) only
D
(a), (b) and (c)
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct structure of tribromooctaoxide is :
A
NEET 2019 Chemistry - Chemical Bonding and Molecular Structure Question 40 English Option 1
B
NEET 2019 Chemistry - Chemical Bonding and Molecular Structure Question 40 English Option 2
C
NEET 2019 Chemistry - Chemical Bonding and Molecular Structure Question 40 English Option 3
D
NEET 2019 Chemistry - Chemical Bonding and Molecular Structure Question 40 English Option 4
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the incorrect statement related to PCl5 from the following :
A
Axial P–Cl bonds are longer than equatorial P–Cl bonds
B
PCl5 molecule is non-reactive
C
Three equatorial P–Cl bonds make an angle of 120º with each other
D
Two axial P–Cl bonds make an angle of 180º with each other