why there is no ghuna on noon of dunia.
why there is no nazal sound on dunia.
Whats the rule because there is ya is not a throat letter and also ya is also not in laam and ra'? Thanks
Answer
The idghaam of the noon saakinah and tanween into a letter of the
is done between two words, not within a word. There is no idhgaam here, instead the noon is pronounced clearly. The rule for the words for the noon saakinah in the four words
is called 
, which means absolute clearness. Please see:
http://www.abouttajweed.com/the-noon-saakinah-and-tanween/merging-of-the-noon-saakinah-and-tanween-p.html
You are welcome.