Chemistry වැඩ්ඩො

[Nirmal1991]

2003 A/L
Chemistry - S

Den nan mukuth mathaka na.

Hebei oya wage prashna walata uththare hoyanna sameekarana gahala piti passe idan neda issarahata balagena yanna one?

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[djnick]

dan nam mathakama na bn owa man sir kenekge paper claz ekath adda et mathaka na
bump

 

[klamb]

Answer is 2

 

[kitisit]

Machan mama A/L karala nam tikak kal eth campus eke kara eke nisa mathakai

mama ubata eken eka kiyanam ethkota meka udaw wei kiyala hithanwa isharata.

1. A HCl eka dala cool wena thiyana eken B hadena eka. Meken wene amlika jaliyakaranayak ethkota oya amida ehema thiyena ewa kadenwa carboylxic amilayay amine ekatai. Meke oya B sudu spatikayak kiyane C6H5COOH (godak welwata)

2. Oya NaHCO3 eka prathikriya karane amlika ewa, carboxlyic amla e wage ewa. spatikaya kiwama oya mama kiwa eka thama, eken CO2 thama pita wela thiyene. B eka hariyaynwa.

3. Mea karala thiyene Dizoanion eka hadana eka mekta aniline onna, C6H5NH2, oka karama baba wage sudu awkshepaya ennwa.

ethkota meke thiyene C6H5NH2 + C6H5COOH

C6H5NHCOC6H5 uthare enna onna.

 

[msurangag]

Machan mama A/L karala nam tikak kal eth campus eke kara eke nisa mathakai

mama ubata eken eka kiyanam ethkota meka udaw wei kiyala hithanwa isharata.

1. A HCl eka dala cool wena thiyana eken B hadena eka. Meken wene amlika jaliyakaranayak ethkota oya amida ehema thiyena ewa kadenwa carboylxic amilayay amine ekatai. Meke oya B sudu spatikayak kiyane C6H5COOH (godak welwata)

2. Oya NaHCO3 eka prathikriya karane amlika ewa, carboxlyic amla e wage ewa. spatikaya kiwama oya mama kiwa eka thama, eken CO2 thama pita wela thiyene. B eka hariyaynwa.

3. Mea karala thiyene Dizoanion eka hadana eka mekta aniline onna, C6H5NH2, oka karama baba wage sudu awkshepaya ennwa.

ethkota meke thiyene C6H5NH2 + C6H5COOH

C6H5NHCOC6H5 uthare enna onna.

thx lot machn

 

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