1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Permanent hardness cannot be removed by

A
using washing soda
B
Calgon's method
C
Clark's method
D
ion exchange method
2
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Which of the following is not true regarding the usage of hydrogen as a fuel?

A
High calorific value
B
The combustible energy of hydrogen can be directly converted to electrical energy in a fuel cell
C
Combusion product is ecofriendly
D
Hydrogen gas can be easily liquefied and stored
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