Question : Which of the following elements is the densest naturally occurring element?
Option 1: Palladium
Option 2: Iridium
Option 3: Ruthenium
Option 4: Osmium
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Correct Answer: Osmium
Solution : The correct answer is Osmium.
Osmium is commonly considered the densest naturally occurring element. It is a hard metal that belongs to the platinum group of elements. Its symbol is Os, and its atomic number is 76. It is glossy and blue-grey or blue-black and is a member of the platinum transition metal family. It is the fourth hardest and most brittle element in the element family, with a very high melting temperature.
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Question : Which of the following elements does not belong to group 1 of the modern periodic table?
Option 1: Sodium
Option 2: Radium
Option 3: Potassium
Option 4: Lithium
Question : The naturally occurring gas that is generated by the breakdown of organic matter by anaerobic bacteria and is used in energy production is called:
Option 1: Compressed Natural Gas
Option 2: Biogas
Option 3: Natural gas
Option 4: Liquified Petroleum Gas
Question : How many isotopes of hydrogen elements are there?
Option 1: 2
Option 2: 3
Option 3: 4
Option 4: None of the options is correct
Question : Directions: Which one of the given responses would be the meaningful order of the following words in ascending order? 1. Probation 2.Interview 3. Selection 4. Appointment 5. Advertisement
Option 1: 5, 3, 2, 1, 4
Option 2: 5, 4, 3, 2, 1
Option 3: 4, 5, 1, 2, 3
Option 4: 5, 2, 3, 4, 1
Question : Which element has the maximum presence in the Sun?
Option 1: Hydrogen
Option 2: Oxygen
Option 3: Argon
Option 4: Krypton
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