Discussion
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- Question
Which of the following is a chemical formula of quicklime?
Options- A. Ca2O
- B. Ca2CO3
- C. CaO2
- D. CaO
- Correct Answer
- CaO
- 1. What is the common name of Sodium Bicarborate?
Options- A. Baking Soda
- B. Washing Powder
- C. Plaster of Paris
- D. Fly Ash Discuss
- 2. What are the main components of Brass Alloy?
Options- A. Copper and Zinc
- B. Copper and Strontium
- C. Copper, Zinc and Nickel
- D. Copper and Nickel Discuss
- 3. What is an exothermic reaction?
Options- A. Reaction in which heat is released.
- B. Reaction in which heat is absorbed.
- C. Reaction in which neither heat is released nor absorbed.
- D. None Discuss
- 4. What is the common characteristic of the elements of the same group in the periodic table?
Options- A. Electrons in outer most shell
- B. Total number of electrons
- C. Total number of protons
- D. Atomic weight Discuss
- 5. Which one of the following forms of phosphorus is most reactive?
Options- A. Black phosphorus
- B. White phosphorus
- C. Violet phosphorus
- D. Red phosphorus Discuss
- 6. The common name of dichlorodifluoromethane is _____.
Options- A. galena
- B. Freon
- C. gypsum
- D. borax Discuss
- 7. Which of the following elements has the lowest melting point?
Options- A. Xenon
- B. Iodine
- C. Barium
- D. Magnesium Discuss
- 8. In an acid base reaction which product is produced along with a salt?
Options- A. Hydrogen gas
- B. Water
- C. Oxygen gas
- D. Carbon dioxide Discuss
- 9. Absolute Zero is defined as
Options- A. The temperature at which all molecular motion ceases
- B. At which water boils at 298K
- C. At which liquid Helium boils
- D. At which the volume becomes zero Discuss
- 10. Bronze is an alloy of
Options- A. Copper & tin
- B. Copper & zinc
- C. Copper & iron
- D. Iron & nickel Discuss
Chemistry problems
Search Results
Correct Answer: Baking Soda
Correct Answer: Copper and Zinc
Correct Answer: Reaction in which heat is released.
Correct Answer: Electrons in outer most shell
Correct Answer: White phosphorus
Correct Answer: Freon
Correct Answer: Xenon
Correct Answer: Water
Correct Answer: The temperature at which all molecular motion ceases
Correct Answer: Copper & tin
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