36 Questions
What is the ionic radius of H⁻ ion in picometers?
210
What is the minimum temperature required to dissociate dihydrogen into hydrogen atoms?
2000 K
What is the purpose of passing dihydrogen through vegetable oils at about 473 K?
To form solid fats
What is the electron affinity of hydrogen in kJ mol⁻¹?
72.8
What is the use of dihydrogen in the oxy-hydrogen torch?
To produce a high temperature of 2500°C
What is the product formed when dihydrogen reacts with calcium?
CaH₂
What is the systematic name of water?
Oxidane
Which of the following metals react with water at room temperature to produce hydrogen?
Na, K
What is the product of the reaction between sodium hydride and water?
Sodium hydroxide and hydrogen
What is the catalyst used in the Bosch process for the production of dihydrogen?
All of the above
Which of the following is a characteristic of hydrogen similar to halogens?
It forms an anion by gaining one electron
What is the oxidation state of hydrogen in its compounds?
-1
What is the byproduct of the reaction between metal hydride and water?
Hydrogen
Which of the following pairs of hydrogen isotopes are harmless?
Ortho hydrogen and para hydrogen
What is the role of hydrogen peroxide in the production of spong rubber?
As an aerating agent
What is the application of hydrogen peroxide in the detection of certain metal ions?
It forms peroxides of characteristic colors
What is the use of hydrogen peroxide in pollution control?
To restore aerobic conditions of sewage waste
What is the application of hydrogen peroxide in the synthesis of certain compounds?
All of the above
What is the primary characteristic of water that enables it to form hydrates with metal salts?
Its ability to act as a Lewis base
What is the term for water molecules that occupy interstitial sites in the crystal lattice of a compound?
Interstitial water
What is the value of the ionization constant of water at 25°C?
1.008 × 10^(-14)
What is the primary difference between hard and soft water?
Their concentration of calcium and magnesium ions
What is a characteristic of water's chemical properties that allows it to act as both an acid and a base?
Its amphoteric nature
What is the term for the heat required to change the state of water from liquid to gas at 373K?
Heat of vaporization
What is the temperature at which water has maximum density?
277 K
Which of the following compounds can be prepared using heavy water (D2O)?
Deuteriosulphuric acid
What is the nature of water's chemical reactions?
Amphoteric
What is the result of water's hydrolytic reaction with metal oxides?
Formation of acid and base
What is the term for the point at which water is in equilibrium with ice and vapour?
Triple point
What is the molecular mass of heavy water (D2O)?
20.028
What is the primary reason for the high bond dissociation energy of dihydrogen?
Due to its high ionisation energy
What is the characteristic of dihydrogen that allows it to react with transition metals?
Its ability to form interstitial hydrides
What is the significance of the temperature of 2000 K in the context of dihydrogen?
It is the temperature at which dihydrogen dissociates into hydrogen atoms
What is the application of the process of passing dihydrogen through vegetable oils at about 473 K?
To prepare solid fats
What is the significance of the ionisation energy of hydrogen?
It determines its bond dissociation energy
What is the characteristic of dihydrogen that makes it a useful reducing agent?
Its high ionisation energy
This quiz covers the physical properties and chemical behavior of hydrogen and its compounds, including atomic radius, ionic radius, ionization energy, electron affinity, and electronegativity.
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