Step 1: Understand the history of WHO.
The World Health Organization (WHO) was established on 7th April 1948 as the United Nations specialized agency for health, headquartered in Geneva, Switzerland.
Step 2: Analyze the options.
The WHO was established on 7th April, 1948, which corresponds to option (B). The other dates are incorrect.
Step 3: Conclusion.
The WHO was established on 7th April, 1948, making option (B) the correct answer.
Conclusion: The correct answer is (B) 7th April, 1948.
List-I | List-II | ||
1 | Nitrogen rich fertilizers | p | Ozone depletion |
2 | Carbon dioxide | q | Eutrophication |
3 | Carbon monoxide | r | Greenhouse effect |
4 | CFC’s | s | Air pollutant |
Calculate the EMF of the Galvanic cell: $ \text{Zn} | \text{Zn}^{2+}(1.0 M) \parallel \text{Cu}^{2+}(0.5 M) | \text{Cu} $ Given: $ E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.763 \, \text{V} $ and $ E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.350 \, \text{V} $
Find the values of a, b, c, and d for the following redox equation: $ a\text{I}_2 + b\text{NO} + 4\text{H}_2\text{O} = c\text{HNO}_3 + d\text{HI} $