On the pH level scale that is shown in the following picture, the PH of pure water is……, which is considered be natural PH.
NTS PET 24/08/2019 (1:30)
a) 05
b) 06
c) 07
d) 08
Thermometer is filled with material
which should have:
a) high freezing point
b) moderate freezing point
c) low freezing point
d) no fixed freezing point
Salt also known as……….
a) table salt
b) rock salt
c) both a and b
d) all of these
Formula of Table salt is………..
a) NaCl
b) NaCl2
c) Agcl
d) Ts
Which of the following chemicals make the washing powder dry?
a) sodium triphosphate of sodium carbonate
b) sodium triphosphate or sodium bicarbonate
c) sodium Bi-Phosphate or sodium tri-carbonate
d) sodium sulphate and sodium silicate
When carbon combines with oxygen it forms carbon dioxide, a gas which………….fire.
a) burns
b) extinguishes
c) both a and b
d) none of these
