Blackbody emits a continuous spectrum. But blackbody is an idealized
body. Do normal objects like a bulb or a table emit a continuous
Yes, the thermal radiation spectrum of "normal" objects, also referred to as thermal spectrum, is continuous.
Does the black body radiation curve depend only on temperature?
Yes, that's how the black body radiation is defined.
If I have iron and copper at the same temperature of say 2000 degree
Celsius; will they appear of same color? similarly a table and chair
at room temperature will their curve be same too?
The relationship between the perceived color due to the thermal radiation and the temperature as well as the shape of the spectral curve, in general, will depend on the emissivity of a material.
Since the emissivity of materials may depend on the wavelength, the spectral curves could be shifted relative to the ideal black body curves and, therefore, the dominant color of such materials due to thermal radiation could be different than the dominant color of an ideal black body or another material at the same temperature.
Besides the shape of spectral curves, the emissivity of real objects is always less than the emissivity of an ideal black body, i.e., less than $1$. In particular, highly reflective, shiny, objects, like a mirror, produce much lower thermal radiation than highly absorbent, dark, objects, like asphalt.
I am assuming the different colors we see for the chair and table is
due to reflected light. but the curve for emitted radiation will be
Yes, the material (paint) of a table or a chair could selectively absorb some visible colors and reflect others, the latter will be perceived as the color of those objects.
The thermal radiation energy of these objects at room temperature lies in the infrared part of the spectrum, which we cannot see.