Discussion
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- Question
Which one of the following forms of phosphorus is most reactive?
Options- A. Black phosphorus
- B. White phosphorus
- C. Violet phosphorus
- D. Red phosphorus
- Correct Answer
- White phosphorus
- 1. Calcium salts used as fertilizer is:
Options- A. Calcium Carbide
- B. Calcium Carbonate
- C. Calcium Cyanide
- D. Calcium Sulphate Discuss
- 2. Which of the following is not a type of chemical weathering?
Options- A. Corrosion
- B. Solution
- C. Oxidation
- D. Carbonation Discuss
- 3. All atoms of uranium have the same
Options- A. Atomic mass
- B. Number of electrons
- C. Atomic number
- D. Mass number Discuss
- 4. Infiltration is the process by which rainwater becomes
Options- A. river water
- B. ground water
- C. salt water
- D. ocean water Discuss
- 5. Which compound is a saturated hydrocarbon?
Options- A. Alkene
- B. Alkane
- C. Alkine
- D. All of the above Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. What is the common name of Sodium Bicarborate?
Options- A. Baking Soda
- B. Washing Powder
- C. Plaster of Paris
- D. Fly Ash Discuss
- 10. Which of the following is a chemical formula of quicklime?
Options- A. Ca2O
- B. Ca2CO3
- C. CaO2
- D. CaO Discuss
Chemistry problems
Search Results
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: ground water
Explanation:
The process of absorbtion of rain water by the soil on the earth is called infiltration. By this process, the rain water that falls on the soil becomes ground water.
Correct Answer: Alkane
Explanation:
Alkanes are saturated hydrocarbons. Saturated means that the hydrocarbon has only single bonds and that the hydrocarbon contains the maximum number of hydrogen atoms for each carbon atom.
Correct Answer: Electrons in outer most shell
Correct Answer: Reaction in which heat is released.
Correct Answer: Copper and Zinc
Correct Answer: Baking Soda
Correct Answer: CaO
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