Discussion
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- Question
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
- Correct Answer
- a beta particle
- 1. 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
- 2. Choose the pure substance from the list below.
Options- A. Sugar
- B. Lemonade
- C. Air
- D. Sea water Discuss
- 3. Dry distillation of calcium formate gives
Options- A. HCOOH
- B. CH3COOH
- C. HCHO
- D. CH3CHO Discuss
- 4. 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
- 5. 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
- 6. An ? particle is _____.
Options- A. A hydrogen molecule
- B. A helium nucleus
- C. An atom of hydrogen
- D. A proton Discuss
- 7. Which of the following gases is not generated in a biogas plant?
Options- A. H2S
- B. CO2
- C. CH4
- D. CO Discuss
- 8. Soft drinks contain:
Options- A. Oxalic acid
- B. Tartaric acid
- C. Carbonic acid
- D. Citric acid Discuss
- 9. ....... is the property of attracting electrons by the halogen atoms in a molecule
Options- A. Electron affinity
- B. Electro positivity
- C. Electro chemistry
- D. Electro negativity Discuss
- 10. Which element is generally No Radioactive?
Options- A. Thorium
- B. Polonium
- C. Germanium
- D. Plutonium Discuss
Chemistry problems
Search Results
Correct Answer: Same number of neutron
Correct Answer: Sugar
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 helium nucleus
Correct Answer: CO
Correct Answer: Carbonic acid
Correct Answer: Electro negativity
Correct Answer: Germanium
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