Discussion
Home ‣ General Knowledge ‣ Chemistry Comments
- Question
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
- Correct Answer
- Reaction in which heat is released.
- 1. 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
- 2. 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
- 3. Calcium salts used as fertilizer is:
Options- A. Calcium Carbide
- B. Calcium Carbonate
- C. Calcium Cyanide
- D. Calcium Sulphate Discuss
- 4. Which of the following is not a type of chemical weathering?
Options- A. Corrosion
- B. Solution
- C. Oxidation
- D. Carbonation Discuss
- 5. All atoms of uranium have the same
Options- A. Atomic mass
- B. Number of electrons
- C. Atomic number
- D. Mass number Discuss
- 6. 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
- 7. What is the common name of Sodium Bicarborate?
Options- A. Baking Soda
- B. Washing Powder
- C. Plaster of Paris
- D. Fly Ash Discuss
- 8. Which of the following is a chemical formula of quicklime?
Options- A. Ca2O
- B. Ca2CO3
- C. CaO2
- D. CaO Discuss
- 9. The common name of dichlorodifluoromethane is _____.
Options- A. galena
- B. Freon
- C. gypsum
- D. borax Discuss
- 10. Which of the following elements has the lowest melting point?
Options- A. Xenon
- B. Iodine
- C. Barium
- D. Magnesium Discuss
Chemistry problems
Search Results
Correct Answer: Electrons in outer most shell
Correct Answer: White phosphorus
Correct Answer: Calcium Sulphate
Correct Answer: Corrosion
Explanation:
Chemical weathering is the process of altering rocks chemically when they are broken down. It includes hydrolysis, oxidation, acid rain, etc...
Correct Answer: Atomic number
Explanation:
There are many isotopes of uranium and all of them have same atomic number i.e, sum of nmber of neutrons and protons.
Correct Answer: Copper and Zinc
Correct Answer: Baking Soda
Correct Answer: CaO
Correct Answer: Freon
Correct Answer: Xenon
Comments
There are no comments.More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.