Question

which gas is usually liberate when an acid reacts with A metal ? illustrate with an example . how will you test for the presence of this gas ? ​

Answer 1

Answer:when an acid reacts with metal hydrogen gas is liberated

Ex= 2NaOH + Zn - Na2ZnO2 + h2

When we bring a lighted matchstick near to the gas it burns with pop up sound this sound shows the presence of hydrogen gas

Explanation:

Answer 2

ʜʏᴅʀᴏɢᴇɴ ɢᴀs

ʜʏᴅʀᴏɢᴇɴ ɢᴀs ɪs ʟɪʙᴇʀᴀᴛᴇᴅ ᴡʜᴇɴ ᴀɴ ᴀᴄɪᴅ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴀ ᴍᴇᴛᴀʟ. ғᴏʀ ᴇxᴀᴍᴘʟᴇ, ᴡʜᴇɴ ᴢɪɴᴄ ᴍᴇᴛᴀʟ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴅɪʟ. ʜʏᴅʀᴏɢᴇɴ ɪs ᴇᴠᴏʟᴠᴇᴅ ᴀɴᴅ sᴀʟᴛ ᴢɪɴᴄ ᴄʜʟᴏʀɪᴅᴇ ɪs ғᴏʀᴍᴇᴅ ᴀs: ɪᴛ ᴄᴀɴ ʙᴇ ᴛᴇsᴛᴇᴅ ʙʏ ʙʀɪɴɢɪɴɢ ᴀ ʙᴜʀɴɪɴɢ ᴄᴀɴᴅʟᴇ ɴᴇᴀʀ ᴛʜᴇ ɢᴀs. ᴛʜᴇ ᴄᴀɴᴅʟᴇ ᴄᴏɴᴛɪɴᴜᴇs ʙᴜʀɴɪɴɢ ᴡɪᴛʜ ᴀ ᴘᴏᴘ sᴏᴜɴᴅ.