Properties of Oxygen

Q.

State the common feature in the electronic configuration of elements Be, Mg, Ca, Sr and Ba

Q. Among the group 16 elements, Oxygen exhibits the widest variety of allotropy – True or False?

1. True
2. False

Q. An atom $X$ has three electrons more than noble gas configuration. What type of ion will it form? Write the formula of its ‘Phosphate’

Q. The correct representation of the formation of water.
$H_2$+$O$ $\to$ $H_{2}O$

1. False
2. True

Q.

Which of the following is common in respiration and combustion?

1. oxygen

2. release of heat and light

3. natural process

4. nitrogen

Q. Burst the bubbles with substances that furnish hydroxide ions in aqueous solution.

1. NaOH
2. KOH
3. CH₃COOH
4. Ca(OH)₂
5. C₁₂H₂₂O₁₁
6. NH${}_4$OH
7. CH₃CONH₂
8. Mg(OH)₂

Q. Effervescence is the escape of gases from an aqueous solution in the form of bubbles or fizz.

1. True
2. False

Q. We studied the reactions of metals with nitrogen and Sulphur but what happens when a non-metal (a) react with nitrogen (b) react with Sulphur