Give reasons for the following:
The ionisation potential of the element increases across a period.
Atomic size decreases and nuclear charges increases as we move from left to right in a period so the energy required to remove one electron from the valence shell increases from left to right thus ionisation potential increases.
Choose the correct answer from the options given below:
Identify the weak electrolyte from the following:
Sodium chloride solution
Dilute Hydrochloric acid
Dilute sulphuric acid
Dilute sulphuric acid
Name the gas in each of the following:
The gas produced when copper reacts with concentrated nitric acid.
Some word/words are missing in the following statement. You are required to rewrite the statement in the correct form using the appropriate word/words:
Magnesium nitride reacts with water to liberate ammonia
Some word/words are missing in the following statements. You are required to rewrite the statement in the correct form using the appropriate word/words:
Magnesium reacts with nitric acid to liberate hydrogen gas.
Name the gas in each of the following:
The gas produced when excess ammonia reacts with chlorine.
Choose the correct answer from the options given below:
The Vapour density of carbon dioxide [C=12,O=16]
32
16
44
44
Choose the correct answer from the option given below:
An element in period -3 whose electron affinity is zero:
Neon
Sulphur
Sodium
Sodium
Choose the correct answer from the options given below:
Which of the following metallic oxides cannot be reduced by normal reducing agents
Magnesium oxide
Copper (II) oxide
Zinc oxide
Zinc oxide
