Which city had many deaths from smog in 1952

Capital city of London had many deaths from smog in 1952.

Explanation:

The Great Smog of 1952 only affected the capital city of London. It wrecked chaos and killed thousands of people during the five days that it lasted. A veil of smoke began to cover the city's major landmarks such as the Big Ben, the London Bridge, etc. Soon after, the fog became contaminated with tons of soot and other toxic contaminants from various industries. There was an inversion in the temperature which resulted in the prevention of sulphurous smoke from rising and clearing up. This was a major disaster that left all the people of London crippled for days and also killing thousands.

The answers would be: 1: the liquid only contains one compound4: the liquid is a pure substance