Discussion
Home ‣ General Knowledge ‣ Chemistry Comments
- Question
Choose the pure substance from the list below.
Options- A. Sugar
- B. Lemonade
- C. Air
- D. Sea water
- Correct Answer
- Sugar
- 1. Dry distillation of calcium formate gives
Options- A. HCOOH
- B. CH3COOH
- C. HCHO
- D. CH3CHO Discuss
- 2. The principal quantum number indicates what property of an electron?
Options- A. energy of electron
- B. distance of electron from nucleus
- C. both a & b
- D. number of subshells Discuss
- 3. What determines the mass number of an element?
Options- A. Number of protons
- B. Number of electrons and protons
- C. Number of protons and neutrons
- D. Number of neitrons Discuss
- 4. In a concentrated solution there is
Options- A. no solute
- B. a large amount of solvent
- C. no solvent
- D. a large amount of solute Discuss
- 5. Which ionization process requires the most energy?
Options- A. C3+ (g) ? C4+ (g) + e-
- B. C (g) ? C+ (g) + e-
- C. C2+ (g) ? C3+ (g) + e-
- D. C+ (g) ? C2+ (g) + e- Discuss
- 6. Isotones have always ______
Options- A. Same number of protons
- B. Same atomic number
- C. Same number of neutron
- D. Same number of proton and same numbe of neutron Discuss
- 7. A proton is identical to _____.
Options- A. the nucleus of helium
- B. the nucleus of a hydrogen atom
- C. an alpha-particle
- D. a beta particle Discuss
- 8. An ? particle is _____.
Options- A. A hydrogen molecule
- B. A helium nucleus
- C. An atom of hydrogen
- D. A proton Discuss
- 9. Which of the following gases is not generated in a biogas plant?
Options- A. H2S
- B. CO2
- C. CH4
- D. CO Discuss
- 10. Soft drinks contain:
Options- A. Oxalic acid
- B. Tartaric acid
- C. Carbonic acid
- D. Citric acid Discuss
Chemistry problems
Search Results
Correct Answer: HCHO
Explanation:
Dry distillation of calcium acetate and calcium formate leads to the formation of aldehydes and ketones.
Correct Answer: both a & b
Explanation:
The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.
Correct Answer: Number of protons and neutrons
Explanation:
The number of protons in an isotope or an atom gives its atomic number whereas the number of protons and neutrons gives its mass number.
Correct Answer: a large amount of solute
Explanation:
In a concentrated solution there is a large amount of solute.
Correct Answer: C3+ (g) ? C4+ (g) + e-
Explanation:
We know that each successive IE is greater than the previous one, because each ionization process removes one electron and hence increases the total attractive force on the remaining electrons from the nucleus. Hence, C3+ (g) ? C4+ (g) + e- needs more energy.
Correct Answer: Same number of neutron
Correct Answer: a beta particle
Correct Answer: A helium nucleus
Correct Answer: CO
Correct Answer: Carbonic acid
Comments
There are no comments.More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.