Question

read each question carefully and circle the correct answer (a, b, 1. the polarity of a water molecule is caused by ______. a. equal sharing of electrons b. unequal sharing of electrons between hydrogen and oxygen c. the same electronegativity of both atoms d. the circular motion of molecules 2. the oxygen atom in a water molecule has a ____ charge. a. slightly positive b. neutral c. slightly negative d. strong positive 3. the hydrogen atoms in a water molecule are held to oxygen by a. ionic bonds b. covalent bonds c. metallic bonds d. hydrogen bonds 4. what type of bond forms between two separate water mole a. ionic bond b. covalent bond c. hydrogen bond d. metallic bond water is called a \universal solvent\ because ______. a. it dissolves all materials b. it can dissolve many substances due to its polarity c. it only dissolves gases d. it reacts with all metals

Explanation:

1. Water is a polar molecule because oxygen has a higher electronegativity than hydrogen, leading to unequal electron sharing.
2. Due to oxygen's higher electronegativity, it attracts electrons more, giving it a slightly negative charge.
3. Hydrogen atoms in a water molecule are covalently bonded to oxygen (sharing electrons).
4. Hydrogen bonds form between separate water molecules (attraction between slightly positive H and slightly negative O of adjacent molecules).
5. Water is called a "universal solvent" as its polarity allows it to dissolve many substances (though not all).

Answer:

1. B. Unequal sharing of electrons between hydrogen and oxygen
2. C. Slightly negative
3. B. Covalent bonds
4. C. Hydrogen bond
5. B. It can dissolve many substances due to its polarity