Question

When metals react with oxygen, they form __________.
Name the non metal which is also the hardest substance known.
Why sodium is always preserved inside kerosene or paraffin?
Name any one non-metal which is good conductor of electricity.

Answer 1

$\Large{\underline{\underline {\bf{Required \: answers : - }}}}$

1] When metals react with oxygen, they form Metal oxides . Metals burn in oxygen to form metal oxides

2] Name the non metal which is also the hardest substance known Diamond (form of carbon)

3] Why sodium is always preserved inside kerosene or paraffin?

Sodium is a highly reactive metal . If sodium is left outside , it reacts with air and other substances in air to form new compounds . To prevent these reactions , Sodium is preserved in kersone (Since sodium doesn't react with kerosene).

4] Name any one non-metal which is good conductor of electricity Graphite .

$\rule{300}{1}$

Answer 2

Answer:

\Large{\underline{\underline {\bf{Required \: answers : - }}}}

Requiredanswers:−

1] When metals react with oxygen, they form Metal oxides . Metals burn in oxygen to form metal oxides

2] Name the non metal which is also the hardest substance known Diamond (form of carbon)

3] Why sodium is always preserved inside kerosene or paraffin?

Sodium is a highly reactive metal . If sodium is left outside , it reacts with air and other substances in air to form new compounds . To prevent these reactions , Sodium is preserved in kersone (Since sodium doesn't react with kerosene).

4] Name any one non-metal which is good conductor of electricity Graphite .

\rule{300}{1}