General Knowledge - General Science

Exercise : General Science - Elements and Metals
6.
Chemical formula for water is
NaAlO2
H2O
Al2O3
CaSiO3
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
The gas usually filled in the electric bulb is
nitrogen
hydrogen
carbon dioxide
oxygen
Answer: Option
Explanation:
No answer description is available. Let's discuss.

8.
Washing soda is the common name for
Sodium carbonate
Calcium bicarbonate
Sodium bicarbonate
Calcium carbonate
Answer: Option
Explanation:

What is the scientific name for washing soda?

Sodium carbonate (also known as washing soda or soda ash), Na2CO3 is a sodium salt of carbonic acid.

Scientific name for baking soda?

Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.


9.
Quartz crystals normally used in quartz clocks etc. is chemically
silicon dioxide
germanium oxide
a mixture of germanium oxide and silicon dioxide
sodium silicate
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
Which of the gas is not known as green house gas?
Methane
Nitrous oxide
Carbon dioxide
Hydrogen
Answer: Option
Explanation:

In order, the most abundant greenhouse gases in Earth's atmosphere are:

* water vapor
* carbon dioxide
* methane
* nitrous oxide
* ozone
* chlorofluorocarbons