Question

After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is 1.155 × 10⁻³ sec⁻¹.
(a) 200
(b) 400
(c) 600
(d) 800

Answer 1

$<b>$
Hᴇʟʟᴏ Dᴇᴀʀ !
ᴛʜᴀɴᴋs ᴀ ʟᴏᴛ ғᴏʀ ʏᴏᴜʀ ǫᴜᴇsᴛɪᴏɴ :-)

$\mathbb{NICE...QUESTION}$

ƲƦ ƇƠƦƦЄƇƬ ƠƤƬƖƠƝ



→ [B]


________________________________

ᴴᴼᴾᴱ ᵀᴴᴱ ᴬᴺˢᵂᴱᴿ ᴴᴱᴸᴾ ᵞᴼᵁ !

Answer 2

$\huge\red{Answer}$

(b) 400

HOPE IT HELPS YOU ☺ !!