ଆମ ଚତୁଃପାର୍ଶ୍ଵରେ ଥିବା ପଦାର୍ଥ (matters in our surroundings) class 9 ,cbse, odia medium

#effect of change of temperature on matters
# inter conversion of matter
# volatile substance

ଆମଚତୁଃପାର୍ଶ୍ଵରେଥିବା