Choose the correct answer from the option given below:
An element in period -3 whose electron affinity is zero:
Neon
Sulphur
Sodium
Sodium
D.
Sodium
Name the gas in each of the following:
The gas produced when copper reacts with concentrated nitric acid.
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
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
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.
Give reasons for the following:
The ionisation potential of the element increases across a period.
Name the gas in each of the following:
The gas produced when excess ammonia reacts with chlorine.
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
Choose the correct answer from the options given below:
The Vapour density of carbon dioxide [C=12,O=16]
32
16
44
44