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
3
KCET 2018
MCQ (Single Correct Answer)
+1
-0
$\mathrm{H}_2 \mathrm{O}_2$ is
A
an oxidising agent
B
a reducing agent
C
both oxidising and reducing agent
D
neither oxidising nor reducing agent
4
KCET 2018
MCQ (Single Correct Answer)
+1
-0
Which of the following ions will cause hardness in water?
A
$\mathrm{Ca}^{2+}$
B
$\mathrm{Na}^{+}$
C
$\mathrm{Cl}^{-}$
D
$\mathrm{K}^{+}$
KCET Subjects
EXAM MAP