The gas used in a refrigerator to cool water is______?

✅ A. Electromagnetic wave

a: Electromagnetic wave | b: Seismic S-wave | c: Water wave | d: Sound wave Read more

✅ A. 29

a: 29 | b: 30 | c: 31 | d: 28 Read more

✅ A. 17000

a: 17000 | b: 170 | c: 1017 | d: 1700 Read more

✅ A. 10

a: 10 | b: 11 | c: 12 | d: 9 Read more

✅ C. Using efficient appliances and switching off unused devices

a: Leaving every light on | b: Opening a refrigerator door for long periods | c: Using efficient appliances and switching off unused devices | d: Blocking ventilation filters Read more

✅ D. 3

a: 2 | b: 4 | c: 5 | d: 3 Read more

✅ C. 4

a: 6 | b: 5 | c: 4 | d: 3 Read more

✅ B. Oxygen

a: Hydrogen only | b: Oxygen | c: Chlorine | d: Neon Read more