1. Which of the following isotopes of hydrogen is radioactive?
Answer:
Explanation:
Tritium, with 2 neutrons, 1 proton, and 1 electron, is radioactive.
2. Hydrogen exhibits positive oxidation state in:
Answer:
Explanation:
In HCl, hydrogen exhibits a +1 oxidation state.
3. Which form of hydrogen is a liquid at very low temperatures?
Answer:
Explanation:
Parahydrogen is more stable and is the form that exists as a liquid at very low temperatures.
4. Electrolysis of acidulated water produces:
Answer:
Explanation:
During electrolysis, oxidation occurs at the anode producing oxygen and reduction occurs at the cathode producing hydrogen.
5. Which of the following is not a use of hydrogen?
Answer:
Explanation:
Hydrogen acts as a fuel, not an oxidizing agent in rockets.
6. Which of the following is the correct order of boiling points for the isotopes of hydrogen?
Answer:
Explanation:
Due to increasing molecular weight, the boiling point increases in the order H2 < D2 < T2.
7. In the water gas shift reaction, carbon monoxide reacts with steam to give:
Answer:
Explanation:
CO + H2O → CO2 + H2 is the water gas shift reaction.
8. Which of the following acids is not produced when hydrogen reacts with non-metals?
Answer:
Explanation:
Nitric acid is not directly produced by the reaction of hydrogen with non-metals.
9. In the Lane's process, hydrogen is obtained by:
Answer:
Explanation:
Lane's process involves passing steam over red-hot iron.
10. Which hydrogen compound has a geometry that is linear?
Answer:
Explanation:
BeH2 has a linear geometry due to sp hybridization of beryllium.
11. Which form of hydrogen has an unpaired electron?
Answer:
Explanation:
Orthohydrogen has unpaired electrons which make it paramagnetic.
12. In liquid state, which hydrogen bond is the strongest?
Answer:
Explanation:
The H-F bond in hydrogen fluoride exhibits the strongest hydrogen bond due to the high electronegativity of fluorine.
13. Which of the following is not a form of hydrogen?
Answer:
Explanation:
Isotopic hydrogen refers to the isotopes of hydrogen (Protium, Deuterium, Tritium) and not a specific form of hydrogen.
14. When exposed to UV light, molecular hydrogen splits into:
Answer:
Explanation:
Ultraviolet light dissociates molecular hydrogen into atomic hydrogen.
15. In the formation of a molecule of water, the number of hydrogen bonds formed is:
Answer:
Explanation:
Each water molecule can form two hydrogen bonds.
16. Which compound does not exhibit hydrogen bonding?
Answer:
Explanation:
Hydrogen bonding requires a highly electronegative atom like F, O, or N. HCl does not exhibit hydrogen bonding.
17. What is the standard condition for the production of dihydrogen by electrolysis?
Answer:
Explanation:
The electrolysis of acidulated water using platinum electrodes produces dihydrogen.
18. Which isotope of hydrogen is used as a moderator in nuclear reactors?
Answer:
Explanation:
Heavy water (D2O), which contains deuterium, is used as a moderator in nuclear reactors.
19. The hydrogen obtained from coal is termed as:
Answer:
Explanation:
When steam is passed over hot coal, water gas (a mixture of CO and H2) is produced.
20. Nascent hydrogen is:
Answer:
Explanation:
Nascent hydrogen refers to hydrogen in its atomic form, just as it's produced and highly reactive.