Chemistry problems
- 1. 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 Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Protons and neutrons have the same charge
- 2. 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 Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
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.
- 3. 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 Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
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,...
- 4. SO2 Polar or Nonpolar? Also asked in: Analyst, Bank Clerk, Bank PO
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
- 5. Bleaching powder is used in drinking water as
Options- A. Disinfectant
- B. Antibiotic
- C. Coagulant
- D. Antiseptic Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO, Database Administrator
Correct Answer: Disinfectant
- 6. 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 Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Transfer of electrons
Explanation:
An ionic bond is formed between two molecules when transfer of valency electrons take place between them.
- 7. An ionic bond is formed when
Options- A. sharing of electrons
- B. transfer of electrons
- C. Both A & B
- D. losing of protons Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: transfer of electrons
- 8. 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 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
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.
- 9. Is SiCl4 polar or nonpolar?
Options- A. Polar
- B. non polar
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: non polar
- 10. 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 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
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.
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