Discussion
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- Question
Brass gets discoloured in air because of the presence of which of the following gases in air ?
Options- A. Hydrogen sulphide
- B. Oxygen
- C. Nitrogen
- D. Carbon dioxide
- Correct Answer
- Hydrogen sulphide
- 1. Which one of the following is not a mixture
Options- A. air
- B. mercury
- C. milk
- D. cement Discuss
- 2. Among the given nutrients, milk is a poor source of
Options- A. Calcium
- B. Protein
- C. Vitamin C
- D. Carbohydrates Discuss
- 3. Name the Scientist who stated that matter can be converted into energy
Options- A. Boyle
- B. Lavoisier
- C. Avogadro
- D. Einstein Discuss
- 4. When formaldehyde and potassium hydroxide are heated , we get
Options- A. Acetylene
- B. Methyl alcohol
- C. Methane
- D. Ethyl formate Discuss
- 5. Which of the following is a non metal that remains liquid at room temperature ?
Options- A. Chlorine
- B. Phosphorous
- C. Bromine
- D. Helium Discuss
- 6. ' Yellow cake ' an item of smuggling across border s
Options- A. A crude form of heroin
- B. A crude form of cocaine
- C. Uranium oxide
- D. Unrefined gold Discuss
- 7. The electrochemical cell stops working after some time because ________
Options- A. Electrode potential of both the electrodes becomes zero
- B. One of electrodes completely vanishes
- C. Electrode potential of both electrodes equalizes
- D. The reaction reverses its direction Discuss
- 8. A ?breath test? used by traffic police to check drunken driving uses ____?
Options- A. Turmeric on filter paper
- B. Silica gel coated with silver nitrate
- C. potassium permanganate-sulphuric acid
- D. Potassium dichromatic-sulphuric acid Discuss
- 9. Cobalt - 60 is commonly used in radiation therapy because it emits
Options- A. alpha - rays
- B. beta rays
- C. gamma rays
- D. X - rays Discuss
- 10. The M.K.S. system was first introduced by
Options- A. archimedes
- B. Eienstein
- C. Newton
- D. Giorgi Discuss
Chemistry problems
Search Results
Correct Answer: mercury
Correct Answer: Vitamin C
Correct Answer: Einstein
Correct Answer: Methyl alcohol
Correct Answer: Bromine
Correct Answer: Uranium oxide
Correct Answer: Electrode potential of both electrodes equalizes
Correct Answer: Potassium dichromatic-sulphuric acid
Correct Answer: gamma rays
Correct Answer: Giorgi
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