List of top Chemistry Questions on Hydrogen

Identify the correct statements from the following
I. In CuSO$_4\cdot5$H$_2$O, only one molecule of H$_2$O is hydrogen bonded.
II. In BaCl$_2\cdot2$H$_2$O, water is in interstitial positions
III. In CrCl$_3\cdot6$H$_2$O, only three H$_2$O molecules form coordinate bonds with Cr$^{3+}$
Which of the following is used as stabilizer for H$_2$O$_2$?
Identify the electron rich hydrides from the following

Which of the following does not undergo Aldol condensation?

Two statements are given below:
I. Sodium hexametaphosphate is used in calgon method for removal of permanent hardness of water
II. Lithium forms interstitial hydrides
Identify the correct answer
Which of the following statements are NOT correct?
A. Hydrogen is used to reduce heavy metal oxides to metals. 
B. Heavy water is used to study reaction mechanism. 
C. Hydrogen is used to make saturated fats from oils.
D. The H-H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element. 
E. Hydrogen reduces oxides of metals that are more active than iron. 
Choose the most appropriate answer from the options given below :
How many molecules of hydrogen are present in 10 g of hydrogen ?
What is the molar ratio of hydrogen and oxygen in the formation of water ?
Which of the following is formed when SO3 is absorbed by concentrated H2SO4?
If the rate of disappearance of N$_2$O$_5$ in the following reaction is 1.2 $\times$ 10$^{-5}$ mol L$^{-1}$ s$^{-1}$, the rate of production of NO$_2$ (in mol L$^{-1}$ s$^{-1}$) is
2N$_2$O$_5$ (g) $\rightarrow$ 4NO$_2$ (g) + O$_2$ (g)
Assertion (A): HCl gas is dried by passing through concentrated H$_2$SO$_4$
Reason (R): HCl gas reacts with NH$_3$ that gives white fumes

Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

The potential of a hydrogen electrode at pH=10 is