Nitrogen helps in preparation of nitrogen based
A. plants
B. fertilizers
C. seeds
D. trees
Related Questions on Chapter 15: Mixtures - Science Mcqs for Grade 7
The point at which solid substance changes into liquid state, is called
A. melting point
B. boiling point
C. power point
D. complex point
The techniques which help to separate mixtures, involve
A. filtration
B. distillation
C. chromatography
D. all of them