ChemistryKhaga · Class 6-8
Acid, base aur ghar ke indicator
Bina chakhe kaise pata chalega ki koi ghol acid hai ya base?
Socho pehle… phir dekho jawab
Indicator se! Indicator woh padarth hai jo acid aur base mein alag rang dikhata hai. Haldi aur litmus dono aise hi indicator hain.
Acid khatte hote hain (nimbu, imli, sirka mein), aur base chikne-phisalan bhare (saabun jaise). Neutral padarth na acid hota hai na base — jaise saada paani. Kabhi bhi anjaan cheez chakhkar test nahi karte.
Litmus ek natural indicator hai: acid neele litmus ko lal kar deta hai, aur base lal litmus ko neela. Haldi bhi indicator hai — base mein woh lal-bhoori ho jaati hai, acid mein peeli hi rehti hai. Isliye haldi ka daag saabun se lal dikhta hai.
Jab acid aur base milte hain, toh ek doosre ka asar kam kar dete hain — ise neutralisation kehte hain, aur isse salt aur paani bante hain. Acid ya base kaun sa hai yeh jaanna isliye zaroori hai ki khaana, saafai aur kheti — sab jagah iska kaam hai.
Ghar pe try karo
Ek safed tissue par haldi ka ghol lagao aur sukha lo. Nimbu ke paani aur saabun ke paani ki ek-ek boond alag jagah daalo. Rang badalna note karo. Kuch chakhna nahi, bade ki nigrani mein karo.
Wow!
Rasoi ki haldi ek natural indicator hai — daadi-nani ke zamaane se yeh rang ka jaadu chalta aa raha hai!
3 sawaal
- Acid neele litmus ko kya karta hai?
Jawab dekho
Lal kar deta hai. Acid neele litmus ko lal karta hai.
- Haldi base mein kaisi dikhti hai?
Jawab dekho
Lal-bhoori. Base mein haldi lal-bhoori ho jaati hai.
- Acid aur base ke milne se kya bante hain?
Jawab dekho
Salt aur paani. Neutralisation mein salt aur paani bante hain.
NCERT se jodo: NCERT Class 7 Science — acids, bases and salts