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- Question
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
- Correct Answer
- Sharing of electrons
ExplanationCovalent 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,...
- 1. Which of the following is not a property of water?
Options- A. Low density
- B. Low specific heat
- C. Low heat of vaporisation
- D. All of the above Discuss
- 2. Which statement about subatomic particles is not true?
Options- A. Protons and neutrons have the same charge
- B. Protons and electrons have the opposite charhes
- C. Protons and neutrons have almost the same mass
- D. All of the above Discuss
- 3. Systematic name for (CuI)s ?
Options- A. Copper Iodide
- B. Cobalt Fluoride
- C. Ferrous Oxide
- D. All of the above Discuss
- 4. Ketchup stored in a tin can may lead to chemical contamination.
Options- A. TRUE
- B. FALSE Discuss
- 5. Isotopes are atoms of the same element that have different
Options- A. numbers of neutrons
- B. numbers of electrons
- C. numbers of protons
- D. atomic numbers Discuss
- 6. SO2 Polar or Nonpolar? Discuss
- 7. Bleaching powder is used in drinking water as
Options- A. Disinfectant
- B. Antibiotic
- C. Coagulant
- D. Antiseptic Discuss
- 8. 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
- 9. An ionic bond is formed when
Options- A. sharing of electrons
- B. transfer of electrons
- C. Both A & B
- D. losing of protons Discuss
- 10. 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 Discuss
Chemistry problems
Search Results
Correct Answer: All of the above
Explanation:
Water can moderate temperature because of the two properties: high-specific heat and the high heat of vaporization.
Hence, all the above given options are not the properties of water.
Correct Answer: Protons and neutrons have the same charge
Correct Answer: Copper Iodide
Explanation:
Copper Iodide is the systematic name of the given compound (CuI)s.
Correct Answer: TRUE
Explanation:
The given statement is True.
Ketchup is acidic, having a pH of 3.9. The acidic component, acetic acid, will react with the metal tin. This reaction will result in a metal acetate that will contaminate the ketchup.
Hence, The acetic acid in the ketchup will react with the metal tin, forming a metal acetate that will pass into the ketchup which leads to its contamination.
Correct Answer: numbers of neutrons
Explanation:
Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.
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: Disinfectant
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: transfer of electrons
Correct Answer: 4
Explanation:
Here 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.
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