Question

Find the odd one out for the following

1 He, CH4, H2O2, NH3
2 Hydrogen, Magnesium, Chlorine, Sodium
3 Boron, Cadmium, Beryllium, heavy water
4 Carbon, Oxygen, Neon, Bromine

kindly as asap :)​

Answer 1

Answer:

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Answer 2

Odd one out.

Explanation:

• Out of He, CH₄, H₂O₂, NH₃- He is odd one out as He is a Nobel gas element with an atomic number 2 whereas CH₄, H₂O₂, NH₃ are compounds which is made up of two or more elements.
• Out of hydrogen, magnesium, chlorine, sodium- hydrogen is odd one out. Because magnesium, chlorine, sodium belongs to same period i.e. period 2nd but hydrogen belong to 1st period.
• Out of Boron, Cadmium, Beryllium, Heavy water- heavy water is odd one out because heavy water is a form of water that contains deuterium than normal hydrogen.
• Out of Carbon, Oxygen, Neon, Bromine- Neon is odd one out because neon is a Nobel gas and Carbon, Oxygen, Bromine are elements belong to p-block.