Pick the correct statement among the following sentences.
1
Both: Adulterated cement does not change its colour even after heating it to high temperature and Physical tests for cement are carried out at 38˚C
2
Adulterated cement does not change its colour even after heating it to high temperature
3
Adulterated cement changes its colour after heating it to high temperature.
4
Physical tests for cement are carried out at 38˚C