Which of the following material is used to produce infrared LED's ?

Which of the following material is used to make calorimeter?

Which of the following material is used to make calorimeter?

Which of the following is used for producing neutrons?

Which of the following waste materials can be used for producing bio-gas? Thermocoal, glass bottle, Tin cans, Paper scrap

Which of the following materials is used for controlling the fission

Which of the following wavelength is in the infrared region?