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- Question
The oxidation number of Cr in K2Cr2O7 is
Options- A. +6
- B. -5
- C. +3
- D. -4
- Correct Answer
- +6
ExplanationWe will rewrite the formula as an equation.
2K + 2Cr + 7O = 0
The zero comes from there being no overall charge on the compound.
Each oxidation number is represented by the element's symbol.
Since this compound is not a peroxide or superoxide, the oxidation value for O is -2
K being in group 1 has a +1 charge and therefore has an oxidation number of K is +1
Now, by putting known values in we have:
2(+1) + 2(Cr) + 7(-2) = 0
2 + 2Cr -14 = 0
2Cr = +12
Cr = +6.
- 1. The real wage will rise if the nominal wage
Options- A. increases more rapidly than the general price level.
- B. increases at the same rate as labor productivity.
- C. falls more rapidly than the general price level.
- D. falls at the same rate as the general price level. Discuss
- 2. The International township built near Pondicherry in India in Collaboration with UNESCO is called
Options- A. Broadway
- B. Gayaville
- C. Auroville
- D. Elbaville Discuss
- 3. Which of the following countries is not a member of the Nuclear Suppliers Group(NSG)
Options- A. France
- B. Russia
- C. USA
- D. Iran Discuss
- 4. Increasing marginal cost of production explains
Options- A. the income effect.
- B. why the supply curve is upsloping.
- C. why the demand curve is downsloping
- D. the law of demand. Discuss
- 5. Pakistan which rejoined the commonwealth, had pulled itself out it in the year
Options- A. 1972
- B. 1975
- C. 1978
- D. 1981 Discuss
- 6. Trade blocs help countries by
Options- A. competition
- B. economic integration
- C. Increase in trade
- D. All of the above Discuss
- 7. Which European Country provide its currency for Bank of Central African states
Options- A. France
- B. UK
- C. Netherlands
- D. Germany Discuss
- 8. How many Regional Commissions are established by the UN Economic and Social Council
Options- A. 2
- B. 3
- C. 5
- D. 1 Discuss
- 9. Where is the Headquarters of WTO
Options- A. Vienna
- B. Paris
- C. Berne
- D. Geneva Discuss
- 10. What does the social security administration develop regulations to determine?
Options- A. healthcare
- B. education
- C. benefits
- D. None of the above Discuss
More questions
Correct Answer: increases more rapidly than the general price level.
Correct Answer: Auroville
Correct Answer: Iran
Correct Answer: why the supply curve is upsloping.
Correct Answer: 1972
Correct Answer: All of the above
Explanation:
A trade bloc is a type of intergovernmental agreement for a group of countries where barriers to trade are reduced or eliminated among the participating states and less competition and for economic integration.
Correct Answer: France
Correct Answer: 5
Correct Answer: Geneva
Correct Answer: benefits
Explanation:
The social security is a welfare plan and an insurance company that regulates the benefits for survivors of deceased workers, disabled workers, retirees and death as well as survivorship benefits.
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