Chemistry
Fuels which do not leave any residue on burning are:
- coal and wood
- coal and LPG
- wood and CNG
- LPG and CNG.
Related Questions
Rust is:
- hydrated iron oxide
- hydrated copper sulphate
- anhydrous iron oxide
- none of the above
Photosynthesis is a process in which plants:
- take in oxygen and give out carbon dioxide
- take in carbon dioxide and give out oxygen
- take in nitrogen and give out oxygen.
- none of the above
Respiration :
- is a slow process
- is a natural and continuous process
- takes place at body temperature
- all of the above
Which of the following is common in combustion and respiration ?
- oxygen
- release of heat and light
- natural process
- nitrogen.