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Extremely Hard Science Quiz Even Einstein would scratch his head!
What is the pH value of seawater?
The African and Sumatran species have two horns; the Indian and Javan species have just one. What animals are we discussing?
Sonar is an acronym for sound navigation and what?
What name is given to vertical columns of elements in the Period Table?
What is the atomic mass of oxygen?
What is the most common injury when scuba diving?
What name is given to a substance which reacts with an acid to form a salt plus water?
In 1986, which Soviet town was the location of a nuclear explosion?
Complete the name of a famous feature on Mercury "The Caloris _____"?
The 'Russian Wreck' lies in which sea?
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General knowledge quiz
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Extremely hard mixed knowledge quiz, how many did you answer correctly?
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Who or what am I?