Question

Q.1.D) Find odd man out.
1. Li, Be, B, CI
2. CI, Br, I, O
3. He, Rn, Ar, B
4. , H, Na, K, He.​

Answer 1

ANSWER

1.Cl

2.O

3.B

4.He

Explanation:

1. all are solid except Cl

2.all are under same group except O

3.all are Noble gas except B

4.all are under same group except He

Answer 2

Chlorine(Cl), Oxygen(O), Boron(B) and Helium(He) are the odd ones out.

• In Li,Be,B & Cl. In the given molecules, All the elements except Cl belong to period 2. Chlorine belongs to period 3.
• In Cl, Br, I & O. In the given molecules, All the elements are halogen(X). Oxygen belongs to group 16.
• In He, Rn, Ar & B. Boron is the odd one out as all the other elements are  Noble Gases.

• In H,Na,K & He. Helium is the odd one out as it's a noble gas and belongs to group 8.

Hence the odd one-outs are Cl, O, B& He.

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