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- Question
Which of the following reactions are exothermic? 1) C + O2 ? CO22) 2Mg + O2 ? 2MgO3) CuSO4 + 5H2O ? CuSO4.5H2O4) All the above
Options- A. 1
- B. 2
- C. 3
- D. 4
- Correct Answer
- 4
ExplanationHere all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.
Generally all the combining reactions are exothermic in nature.
- 1. An ionic bond is formed when
Options- A. sharing of electrons
- B. transfer of electrons
- C. Both A & B
- D. losing of protons Discuss
- 2. What happens to electrons in an ionic bond?
Options- A. collision of electrons
- B. Sharing of electrons
- C. Both A & B
- D. Transfer of electrons Discuss
- 3. Bleaching powder is used in drinking water as
Options- A. Disinfectant
- B. Antibiotic
- C. Coagulant
- D. Antiseptic Discuss
- 4. SO2 Polar or Nonpolar? Discuss
- 5. Covalent bonds are formed when electrons are
Options- A. Transfer of electrons
- B. Sharing of electrons
- C. Dividing of electrons
- D. All of the above Discuss
- 6. Is SiCl4 polar or nonpolar?
Options- A. Polar
- B. non polar
- C. Both A & B
- D. None of the above Discuss
- 7. Which of the following processes is endothermic?
Options- A. Melting of ice
- B. Mixing of potassium chloride with water
- C. Photosynthesis
- D. All of the above Discuss
- 8. Which of the following is a major function of chloride?
Options- A. Helps maintain gastric acidity
- B. Acts as principal intracellular electrolyte
- C. Acts as principal intracellular electrolyte
- D. All of the above Discuss
- 9. What unit is used to measure weighted average atomic mass?
Options- A. amu
- B. gram/mole
- C. Both A & B
- D. 1/mole Discuss
- 10. The bonds in BaO are best described as
Options- A. covalent
- B. ionic
- C. polar
- D. non polar Discuss
Chemistry problems
Search Results
Correct Answer: transfer of electrons
Correct Answer: Transfer of electrons
Explanation:
An ionic bond is formed between two molecules when transfer of valency electrons take place between them.
Correct Answer: Disinfectant
Correct Answer: SO2 has a net dipole moment and has a bent shape in its structure as water molecule Hence it is a polar molecule
Correct Answer: Sharing of electrons
Explanation:
Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.
Examples of compounds with covalent bonds ::
HCl, CO2, O2,...
Correct Answer: non polar
Correct Answer: All of the above
Explanation:
The process which involves absorption of heat is endothermic.
Here given all the options are involving in absorption of heat. Hence, all the above are endithermic.
Correct Answer: Helps maintain gastric acidity
Correct Answer: Both A & B
Explanation:
The unit which is used to measure weighted average atomic mass is Atomic Mass Unit (amu).
The amu or gram/mole can also be used for this measure.
Correct Answer: ionic
Explanation:
In the bond formation of barium with oxygen, the valency electrons from the barium transferred to the oxygen and forms an ionic bond.
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