Match the following and identify the correct option. (a) CO g + H 2 g (i) Mg HCO 3 2 + Ca HCO 3 2 (b) Temporary hardness of water (ii) An electron deficient hydride (c) B 2 H 6 (iii) Synthesis gas (d) H 2 O 2 (iv) Non-planar structure

(a)-(iii); (b)-(i); (c)-(ii); (d)-(iv)

(a)-(iii); (b)-(ii); (c)-(i); (d)-(iv)

(a)-(iii); (b)-(iv); (c)-(ii); (d)-(i)

(a)-(i); (b)-(iii); (c)-(ii); (d)-(iv)

EASY

Earn 100

Why do we not use distilled water for drinking though it is the purest form?

Important Questions on Water

MEDIUM

Science>Chemistry>Water>Hardness of Water

Given below are two statements: One is labelled as Assertion A and the other labelled as reason $R$

Assertion $A :$ During the boiling of water having temporary hardness, $Mg {({HCO}_{3})}_{2}$ is converted to ${MgCO}_{3}$

Reason $R :$ The solubility product of $Mg (OH)_{2}$ is greater than that of ${MgCO}_{3}$ .

In the light of the above statements, choose the most appropriate answer from the options given below:

MEDIUM

Science>Chemistry>Water>Hardness of Water

Match the following and identify the correct option.

(a) $CO (g) + H_{2} (g)$	(i) $Mg {({HCO}_{3})}_{2} + Ca {({HCO}_{3})}_{2}$
(b) Temporary hardness of water	(ii) An electron deficient hydride
(c) $B_{2} H_{6}$	(iii) Synthesis gas
(d) $H_{2} O_{2}$	(iv) Non-planar structure

EASY

Science>Chemistry>Water>Hardness of Water

Which of the following ions will cause hardness in water?

MEDIUM

Science>Chemistry>Water>Hardness of Water

The major products during the removal of temporary hardness of water are

MEDIUM

Science>Chemistry>Water>Hardness of Water

The hardness of a water sample containing

10^{- 3} M {M g S O}_{4}

expressed as

{C a C O}_{3}

equivalents (in

p p m

) is . (molar mass of

{M g S O}_{4}

120.37 g / m o l

)

EASY

Science>Chemistry>Water>Hardness of Water

Permanent hardness cannot be removed by

EASY

Science>Chemistry>Water>Hardness of Water

Treatment with lime can remove hardness of water caused by

MEDIUM

Science>Chemistry>Water>Hardness of Water

The products obtained during treatment of hard water using Clark's method are

EASY

Science>Chemistry>Water>Hardness of Water

The temporary hardness of a water sample is due to compound

X .

Boiling this sample converts

X

to compound

Y .

X

and

Y,

respectively, are:

EASY

Science>Chemistry>Water>Hardness of Water

Distilled water is _____ of the electricity.

MEDIUM

Science>Chemistry>Water>Hardness of Water

Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to

EASY

Science>Chemistry>Water>Hardness of Water

Permanent hardness in water cannot be cured by:

MEDIUM

Science>Chemistry>Water>Hardness of Water

The metal salts formed during softening of hardwater using Clark's method are

EASY

Science>Chemistry>Water>Hardness of Water

Which of the following is used for removing permanent hardness of water ?

EASY

Science>Chemistry>Water>Hardness of Water

The one that is NOT suitable for the removal of permanent hardness of water is :

EASY

Science>Chemistry>Water>Hardness of Water

The method used to remove the temporary hardness of water is:

MEDIUM

Science>Chemistry>Water>Hardness of Water

What is the hardness of a water sample

(

in terms of equivalents of

{CaCO}_{3})

containing

10^{- 3} M {CaSO}_{4}

(

Molar mass of

{CaSO}_{4} = 136 g {mol}^{- 1})

EASY

Science>Chemistry>Water>Hardness of Water

Polluted water causes _____ in humans.

EASY

Science>Chemistry>Water>Hardness of Water

The process by which the water droplets melt in the clouds and fall on the ground is called _____.

EASY

Science>Chemistry>Water>Hardness of Water

Daily human activities like bathing in the river does not cause pollution.

Why do we not use distilled water for drinking though it is the purest form?

Important Questions on Water

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