Discussion
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- Question
If the atomic number of Krypton is 36, then its electronic configuration is:
Options- A. 2,8,18,8
- B. 2,8,20,6
- C. 2,18,16
- D. 2,18,8,8
- Correct Answer
- 2,8,18,8
- 1. The main cause of rancidity in foods is the ____ of fats and oils.
Options- A. hydrolysis
- B. clarification
- C. reduction
- D. oxidation Discuss
- 2. Which of the following is essential for the synthesis of thyroxin?
Options- A. Potassium
- B. Calcium
- C. Iodine
- D. Sodium Discuss
- 3. The polar ice-caps are made of ____________ water
Options- A. Saline
- B. Salt
- C. Sour
- D. Fresh Discuss
- 4. Atomic bomb is based on which of the following principle?
Options- A. Nuclear fusion
- B. Nuclear fission
- C. Natural radioactivity
- D. All options are correct Discuss
- 5. Which among the following minerals is also known as Horn Silver?
Options- A. Silver Chroride
- B. Zinc Phosphate
- C. Silver Iodide
- D. Silver Sulphide Discuss
- 6. Chlorine gas is used in the manufacture of:
Options- A. Baking powder
- B. Bleaching powder
- C. Baking soda
- D. Washing soda Discuss
- 7. Who among the following laid the foundation of chemical sciences by establishing two important laws of chemical combination?
Options- A. Joseph L. Proust
- B. Antoine L. Lavoisier
- C. Ernest Rutherford
- D. Democritus Discuss
- 8. Elements A, B and C occur as Dobereiners triads. If the atomic mass of A is 7 and that of C is 39, what will be the atomic mass of B?
Options- A. 20
- B. 40
- C. 23
- D. 12 Discuss
- 9. Metals reacts with acids to give:
Options- A. a salt and chlorine
- B. a salt and hydrogen
- C. a salt and water
- D. a salt and base Discuss
- 10. What is the percentage of oxygen in Al2(SO4)3 ?
Options- A. 57.7%
- B. 56.1%
- C. 53.1%
- D. 52.6% Discuss
Chemistry problems
Search Results
Correct Answer: oxidation
Correct Answer: Iodine
Correct Answer: Fresh
Correct Answer: Nuclear fission
Correct Answer: Silver Chroride
Correct Answer: Bleaching powder
Correct Answer: Antoine L. Lavoisier
Correct Answer: 20
Correct Answer: a salt and hydrogen
Correct Answer: 56.1%
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