General Science problems
- 1. Galvanised iron sheets have a coating of
Options- A. lead
- B. chromium
- C. zinc
- D. tin Discuss
Correct Answer: zinc
- 2. Washing soda is the common name for
Options- A. Sodium carbonate
- B. Calcium bicarbonate
- C. Sodium bicarbonate
- D. Calcium carbonate Discuss
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.
- 3. Marsh gas is
Options- A. nitrogen
- B. ethane
- C. methane
- D. hydrogen Discuss
Correct Answer: methane
- 4. In fireworks, the green flame is produced because of
Options- A. sodium
- B. barium
- C. mercury
- D. potassium Discuss
Correct Answer: barium
- 5. The element common to all acids is
Options- A. hydrogen
- B. carbon
- C. sulphur
- D. oxygen Discuss
Correct Answer: hydrogen
- 6. The average salinity of sea water is
Options- A. 3%
- B. 3.5%
- C. 2.5%
- D. 2% Discuss
Correct Answer: 3.5%
- 7. What is laughing gas?
Options- A. Nitrous Oxide
- B. Carbon monoxide
- C. Sulphur dioxide
- D. Hydrogen peroxide Discuss
Correct Answer: Nitrous Oxide
- 8. Which of the following is a non metal that remains liquid at room temperature?
Options- A. Phosphorous
- B. Bromine
- C. Chlorine
- D. Helium Discuss
Correct Answer: Bromine
- 9. Potassium nitrate is used in
Options- A. medicine
- B. fertiliser
- C. salt
- D. glass Discuss
Correct Answer: fertiliser
- 10. 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
Correct Answer: silicon and germanium
More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.