1

NEET 2016 Phase 1

MCQ (More than One Correct Answer)
Which of the following statements about hydrogen is incorrect?
A
Hydronium ion, H3O+ exists freely in solution.
B
Dihydrogen does not act as a reducing agent.
C
Hydrogen has three isotopes of which tritium is the most common.
D
Hydrogen never acts as cation in ionic salts.

Explanation

Dihydrogen acts as a powerful reducing agent and reduces metal oxides such as CuO, ZnO, PbO and Fe3O4 to their respective metals.

CuO + H2 $$ \to $$ Cu + H2O

ZnO + H2 $$ \to $$ Zn + H2O

Fe3O4 + 4H2 $$ \to $$ 3Fe + 4H2O

Hydrogen has three isotopes of which protium is the most common and tritium is radioactive.

Questions Asked from Hydrogen

On those following papers in MCQ (Multiple Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
NEET 2016 Phase 1 (1)
keyboard_arrow_right

Joint Entrance Examination

JEE Advanced JEE Main

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE ME GATE PI GATE EE GATE CE GATE IN

Medical

NEET

CBSE

Class 12