A few Chemistry questions...?

Question

1 - Is ethanol miscible in water?
2 - Does ethanol conduct electricity?

3 - Why hexanol evaporates more slowly than heptane? Is it because:

(A) Hexanol has larger molecules
(B) Stronger covalent bonds
(C) More bonding elements
(D) Hydrogen bonding between molecules

4 - Why methanal is soluble in water?

(A) Water can form hydrogen bonds with it
(B) Methanal has the smallest of all aldehyde molecules
(C) Water and methanal are both covalent
(D) Methanal forms hydrated ions in solution

Answer 1

Ethanol is miscible in water in any proportion.

Ethanol doesn't conduct electricity - it's covalently bonded and there is no ionic nature to it -- thus, no conductivity of electron flow.

Hexanol has an -OH bond and that leads to hydrogen bonding. The Oxygen atom is highly electronegative, pulling a lion's share of the H electron toward the O. This leaves a partial positive charge on the H, making Hydrogen bonding possible.

Water and methanal are both covalent, but the aldehyde group makes the molecule polar. Since water is also polar, and like dissolves like, it mixes.

Answer 2

a million.B (the only one that isn't an alkane.i.e. does no longer obey the formula CnH2n+2) 2.B (each and every of the others comprise Oxygen- Hydrocarbons purely have Hydrogen and Carbon) 3.A (Has to obey formula CnH2n-2 (alkynes)) 4.C (Pentene is an alkene....it incorporates one C=C bond) 5. it relatively is as a results of fact it is an alkene - alkenes are no longer saturated as they comprise double C=C bonds 6. 3 Pairs 3 bonds - Six electrons shared in entire

Answer 3

1) Yes
2) No
3) D
4) A

Answer 4

1. yes
2. no
3. D
4. B