Use the photo to answer Questions 6 and 7. 6. Two metal samples are each placed in a beaker
containing the same solution. What evidence
indicates that a chemical reaction is taking place
in one of the beakers? Circle all that apply.
A. A gas is being given off.
B. There is a change in color.
C. The solution is clear and colorless.
D. Bubbles are forming.
- 20 ml
-60
40
- 20
7. Based on what you observe in the beakers, which
of the following statements is true?
A. Chemical reactions can always be seen.
B. The two samples of metal are different substances.
C. Chemical reactions are unpredictable.
D. New substances are formed in each beaker.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.