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- Question
What is the oxidation number of carbon in NaHCO3?
Options- A. -4
- B. -3
- C. +4
- D. +2
- Correct Answer
- +4
ExplanationThe given compound is NaHCO3 Sodium bicarbonate which is commonly known as Baking soda.
Oxidation numbers are the charges on ions. When a neutral atom loses electrons it becomes positively charged. When a neutral atom gains electrons it becomes negatively charged.
Here the C represents the oxidation state of carbon in this compound. Compounds are electrically neutral, which is why we set the sum of the oxidation states equal to zero.
Sodium has a +1 oxidation state. Hydrogen has a +1 oxidation state. Oxygen has a -2 oxidation state. There are three oxygen atoms, which means the total oxidation state provided by both oxygen ions is -6. Adding up these oxidation states we get:
1 + 1 + (-6) + C = 0
-4 + C = 0
=> C = 4
This means the oxidation state of carbon in this compound is +4. - 1. What is an FET?
Options- A. Farad Effect Transformer
- B. Field Effect Transformer
- C. Field Effect Transistor
- D. French Energy Transfer Discuss
- 2. The greatest variety of animal and plant species is fund in
Options- A. temperate grasslands
- B. tropical moist forests
- C. tundra regions
- D. in hot deserts Discuss
- 3. The members of the Rajya Sabha are elected for a term
Options- A. of six years
- B. determined by the state legislative assembly of a state
- C. of four years
- D. None of the above Discuss
- 4. The shallow seas found in the Atlantic basin include the
Options- A. Caribbean sea and Mediterranean
- B. Baltic and Arctic seas
- C. Gulf of Mexico
- D. All of the above Discuss
- 5. Coral reefs in India can be found in
Options- A. the coast of Orissa
- B. Waltair
- C. Rameshwaram
- D. Trivandrum Discuss
- 6. Which of the following is the lightest metal?
Options- A. Mercury
- B. Lithium
- C. Lead
- D. Silver Discuss
- 7. The first graphical browser for the WWW was named:
Options- A. Netscape
- B. Veronica
- C. Mosaic
- D. Explorer Discuss
- 8. What Designates where the next action occurs?
Options- A. Decode
- B. Highlight
- C. Select
- D. Mother board Discuss
- 9. 'Eight Lives' is a book written by
Options- A. Raja Ramana
- B. Savita Ambedkar
- C. Mahesh Yogi
- D. Raj Mohan Gandhi Discuss
- 10. In India the first television programme was broadcasted in
Options- A. 1959
- B. 1965
- C. 1976
- D. 1957 Discuss
More questions
Correct Answer: Field Effect Transistor
Correct Answer: tropical moist forests
Correct Answer: of six years
Correct Answer: All of the above
Correct Answer: Rameshwaram
Correct Answer: Lithium
Correct Answer: Mosaic
Correct Answer: Select
Correct Answer: Raj Mohan Gandhi
Correct Answer: 1959
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