Answer 1 : State X is lightening and state Y is air.
Explanation:
Lightening is a phenomena which occurs due to electrostatic interaction between negatively charged ions and positively charged ions present in atmosphere.
Air is composed of various molecules of gases.
Answer 2: Third statement is correct.
Explanation:
When the vegetables are chopped change in shape of the vegetables that is physical change takes place.
When food is broken down into simpler form during digestion, chemical change takes place. During digestions the chemical composition of food changes as it was broken down into simpler molecules.
Answer:
The balanced equation is 2K(s) + Cl2(g)→2KCl(s)
C. no difference in the electronegativity of oxygen and hydrogen
Strontium (Sr). Elements in the same group of the periodic table have similar characteristics.
