Question

please tell correct answer

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Answer 1

Explanation:

When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass

Answer 2

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4. Increase In 1% of carbondioxide monoxide in air leads to death.Explain

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Methods

A literature review was performed where articles were sought in MEDLINE medical database via PubMed using the search terms: “dry ice poisoning,” “carbon review.

Management 

When confronted with patients with carbon dioxide intoxication, the immediate removal of the casualty (and unprotected rescuers) from the toxic environment is needed [15]. Oxygen should be administered, and appropriate supportive care is advisable [15]. Relating to treatment, both normal and high concentration oxygen have been recommended in the literature, without a definite consensus being reached at the moment. Benefits of each approach have been discussed earlier within the topic “CO2 toxicity in humans” [16, 17].

Conclusion

Carbon dioxide poisoning, having a role both as an asphyxiant and as a toxicant, is a rare but not to miss diagnosis. Special attention is needed for pre-hospital responders, who should stay alert for the possibility of a CO2 intoxication for their own safety, especially in cases involving dry ice or confined spaces. When confronted with a victim, he/she should be removed from the dangerous area as fast as possible and oxygen should be administered. Without adequate treatment, victims may show acute reduced cognitive performance, respiratory failure, and circulatory arrest.