MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Heavy Water

By which reac...

Question

By which reaction, formation of hard water takes place?

A

by only

d

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

by only

a

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

by

a, b, c

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

by all processes

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B by only $a$
The hardness of water is due to presence of calcium or magnesium salts. In reaction (a), calcium salt is formed. This gives hardness to water.
$C a (O H)_{2} + 2 H C l \to C a C l_{2} + 2 H_{2} O$ .

Suggest Corrections

thumbs-up

0

Similar questions

Q. In a room containing air, heat can go from one place to another

(a) by conduction only
(b) by convection only
(c) by radiation only
(d) by all the three modes

Q. A thermos flask prevents loss or gain of heat by

(a) conduction only
(b) convection only
(c) radiation only
(d) all of the above

Q. What are the functions of the part marked X in this picture?
Figure
A. To anchor plant firmly to the ground.
B. To store excess food made by the plant.
C. To take in water for the plant.

(a) only B
(b) A and B only
(c) A, B and C
(d) only B and C

A trait in an organism is influenced by :

(a) paternal DNA only (b) maternal DNA only

(c) both maternal and paternal DNA (d) neither by paternal nor by maternal DNA.

Q. The binary operation * defined on N by

a * b = a + b + ab for all a, b ∈ N is

(a) commutative only
(b) associative only
(c) commutative and associative both
(d) none of these

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Heavy Water

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon