Iron nails are dipped into blue copper sulphates solution. After some time iron nails are

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معزز ممبران، خدمات کے معیار کو بہتر کرنے کے لئے ہم نے ایف جی اسٹڈی کوئز کے ڈیزائن اور ڈھانچے کو تبدیل کیا ہے۔جس سے کچھ پرانے صفحات کا ایڈریس تبدیل ہوچکا ہے۔اگر آپ کو مطلوبہ مواد/صفحہ نہیں مل رہا تو براہ کرم اس لنک پر جائیں
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Iron nails are dipped into blue copper sulphates solution. After some time iron nails are

Dissolved and blue colour is discharged

not dissolved but blue colour is discharged

not dissolved and blue colour is not discharge

dissolved but blue colour is not discharged