Noble gases are used in discharge tubes to give different colours. Reddish-orange glow is due to (a) Ar (b) Ne (c) Xe (d) Kr Noble gases are used in discharge tubes to give different colours. Reddish-orange glow is due to (a) Ar (b) Ne (c) Xe (d) Kr November 25, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related