Question

find the odd man out:
1) Dry cell, hydrochloric acid, Ni-cd cell, Lead acid cell.

2) Ar,Ne,O2,C​

Answer 1

Answer:

hydrochloric acid

O2

Explanation:

Please follow me

Answer 2

1. hydrochloric acid is a odd man out.

2. O2 is a odd man out.

Explanation:

1.    

• Dry cell - A dry cell is a type of electric battery, commonly used for portable electrical devices.

• Hydrochloric acid - also know as muriatic acid, is an aqueous solution of hydrogen chloride.

• ni-cd cell - It is a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes.
• Lead acid cell - It is a type of rechargeable battery. It is the first type of rechargeable battery ever created.

Dry cell , ni-cd cell, Lead acid cell these are all batteries hydrochloric acid is a acid, So Hydrochloric acid is a odd man out.

2.

• Ar - Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.
• Ne - Neon is a chemical element with symbol Ne and atomic number 10.
• O2 -  oxygen is called as "dephlogisticated air", and did not recognize as a chemical element .
• C - Carbon is a chemical element with symbol of c and atomic number 6.

Ar , Ne , C these are all chemical elements O2 is a air, So O2 is a odd man out.