The victim was identified as Bharti Gupta. The deceased was married to Vikas Gupta 12 years ago and had three children.
The police said one of their children in their statement said their father, who is presently unemployed, made her mother consume poison. She was rushed to the Lal Bahadur Shastri hospital where she succumbed.
The police have detained Vikas Gupta for questioning in the case.
In another incident, a 55-year-old woman identified as Kesar was found murdered in her house in Bara Hindu Rao area. Her body bore strangulation marks and was wrapped in a blanket.
The police said ever since the incident, her husband Hamid Abdul had been missing and was suspected to be behind the killing.
The police said a case had been registered and investigations were underway.