Hydrogen · Chemistry · NEET
MCQ (Single 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 $$\mathrm{H}-\mathrm{H}$$ 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:
The pollution due to oxides of sulphur gets enhanced due to the presence of:
(a) particulate matter (b) ozone (c) hydrocarbons (d) hydrogen peroxide
Choose the most appropriate answer from the options given below:
In the neutral or faintly alkaline medium, KMnO4 oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is form
(i) Heavy water is used as a moderator in nuclear reactors.
(ii) Heavy water is more associated than ordinary water.
(iii) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?