Subject :Sam Class : Sample
Which of the following statements are incorrect?
I. Reactivity of Al decreases if it is dipped in nitric acid.
II. Carbon can reduce the oxides of Na and Mg.
III. NaCl is a good conductor of electricity in solid state.
IV. Metals like K, Ca and Mg are always found in free state in nature.
AI, II and III only
BII, III and IV only
CI and III only
DII and III only