Are some of the guidelines for moral behavior described in the qur×an?

  Respect and honour all human beings irrespective of their religion, colour, race, sex, language, status, property, birth, profession/job and so on 
[al-Isra' 17:70]
 
2.     Talk straight, to the point, without any ambiguity or deception 
[al-Ahzab 33:70]
 
3.     Choose best words to speak and say them in the best possible way 
[al-Baqarah 2:83]
 
4.     Do not shout. Speak politely keeping your voice low. 
[Luqman 31:19]
 
5.     Always speak the truth. Shun words that are deceitful and ostentatious 
[al-Hajj 22:30]
 
6.     Do not confound truth with falsehood 
[al-Baqarah 2:42]
 
7.     Say with your mouth what is in your heart 
[al-E Imram 3:167]
 
8.     Speak in a civilised manner in a language that is recognised by the society and is commonly used 
[An Nisa 4:5]
 
9.     When you voice an opinion, be just, even if it is against a relative 
[al-An'am 6:152]
 
10.  Do not be a bragging boaster 
[Luqman 31:18]
 
11.  Do not talk, listen or do anything vain 
[al-Mu'mineen 23:3, al-Qasas 28:55]
 
12.  Do not participate in any paltry. If you pass near a futile play, then pass by with dignity 
[al-Furqan 25:72]
 
13.  Do not verge upon any immodesty or lewdness whether surreptitious or overt 
[al-An'am 6:151]
 
14.  If, unintentionally, any misconduct occurs by you, then correct yourself expeditiously 
[al-E-Imram 3:134]
 
15.  Do not be contemptuous or arrogant with people 
[Luqman 31:18]
 
16.  Do not walk haughtily or with conceit    
[al-Isra' 17:37, Luqman 31:18]
 
17.  Be moderate in thy pace 
[Luqman 31:19]
 
18.  Walk with humility and sedateness 
[al-Furqan 25:63]
 
19.  Keep your gazes lowered devoid of any lecherous leers and salacious stares 
[an-Nur 24:30-31, Ghafir 40:19]
 
20.  If you do not have complete knowledge about anything, better keep your mouth shut. You might think that speaking about something without full knowledge is a trivial matter. But it might have grave consequences    
[an-Nur 24:14-16]