Discussion
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- Question
The average salinity of sea water is
Options- A. 3%
- B. 3.5%
- C. 2.5%
- D. 2%
- Correct Answer
- 3.5%
- 1. The element common to all acids is
Options- A. hydrogen
- B. carbon
- C. sulphur
- D. oxygen Discuss
- 2. In fireworks, the green flame is produced because of
Options- A. sodium
- B. barium
- C. mercury
- D. potassium Discuss
- 3. Marsh gas is
Options- A. nitrogen
- B. ethane
- C. methane
- D. hydrogen Discuss
- 4. Washing soda is the common name for
Options- A. Sodium carbonate
- B. Calcium bicarbonate
- C. Sodium bicarbonate
- D. Calcium carbonate Discuss
- 5. Galvanised iron sheets have a coating of
Options- A. lead
- B. chromium
- C. zinc
- D. tin Discuss
- 6. What is laughing gas?
Options- A. Nitrous Oxide
- B. Carbon monoxide
- C. Sulphur dioxide
- D. Hydrogen peroxide Discuss
- 7. Which of the following is a non metal that remains liquid at room temperature?
Options- A. Phosphorous
- B. Bromine
- C. Chlorine
- D. Helium Discuss
- 8. Potassium nitrate is used in
Options- A. medicine
- B. fertiliser
- C. salt
- D. glass Discuss
- 9. The two elements that are frequently used for making transistors are
Options- A. boron and aluminium
- B. silicon and germanium
- C. iridium and tungsten
- D. niobium and columbium Discuss
- 10. The most important ore of aluminium is
Options- A. galena
- B. calamine
- C. calcite
- D. bauxite Discuss
General Science problems
Search Results
Correct Answer: hydrogen
Correct Answer: barium
Correct Answer: methane
Correct Answer: Sodium carbonate
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.
Correct Answer: zinc
Correct Answer: Nitrous Oxide
Correct Answer: Bromine
Correct Answer: fertiliser
Correct Answer: silicon and germanium
Correct Answer: bauxite
Explanation:
Bauxite is an aluminium ore and is the main source of aluminium.
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