1.

We know about elements and compounds. Find out the odd one from the following.Give reason?a. (A) Hydrogen (B) Oxygen (C)Nitrogen (D) Carbon dioxideb. (A) Sodium (Na), (B) Pottasium (K) (C) Magnesium (Mg), (D) Iron (Fe)c. Write the molecular formula of carbon dioxide? d. What is the Latin name of sodium?

Answer»

a. Carbon dioxide – Compound, others are elements.

b. Magnesium – Others take symbols from their Latin name.

c. CO2

d. Natrium



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