Match the following compounds (Column-I) with their uses (Column-II) S. No. Column-I S.No. Column-II (I) Ca OH 2 (A) casts of statues (II) NaCl (B) white wash (III) CaSO 4 · 1 2 H 2 O (C) antacid (IV) CaCO 3 (D) washing soda preparation

(I)-(B), (II)-(D), (III)-(A), (IV)-(C)

(I)-(D), (II)-(A), (III)-(C), (IV)-(B)

(I)-(B), (II)-(C), (III)-(D), (IV)-(A)

(I)-(D), (II)-(C), (III)-(B), (IV)-(A)

EASY

Earn 100

Write the reaction of calcium oxide with carbon dioxide.

Important Questions on The s-Block Elements

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

Dead burnt plaster is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

When gypsum is heated to

393 K,

it forms:

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

Which of the reactions represents "slaking of lime"?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

What is the commercial name for calcium oxide?

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

Match the following compounds (Column-I) with their uses (Column-II)

S. No.	Column-I	S.No.	Column-II
(I)	$Ca {(OH)}_{2}$	(A)	casts of statues
(II)	$NaCl$	(B)	white wash
(III)	${CaSO}_{4} \cdot \frac{1}{2} H_{2} O$	(C)	antacid
(IV)	${CaCO}_{3}$	(D)	washing soda preparation

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

The suspension of slaked lime in water is known as

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

The substance not likely to contain CaCO₃is

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

Setting of plaster of Paris is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

The setting of plaster of paris involves:

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

What is the difference between slaked lime and lime water?

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

Question Image

$(C) (s) + H_{2} O \to (E) (g)$ .
The compound (E)(g) is :

EASY

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

The compound insoluble in acetic acid is

MEDIUM

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

When a piece of limestone reacts with dilute

H C l

, a gas

X

is produced. When gas

X

is passed through lime water, then a white precipitate

Y

is formed. On passing excess of gas

X

, the white precipitate dissolves forming a soluble compound

Z

. What are

X, Y

and Z?

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium

A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance.
(i) What is substance P? Write its common name as well as chemical formula.
(ii) What is substance Q?
(iii) What is gas R?
(iv) What is substance S? What is its clear solution known as?
(v) What is substance T? Name any two natural forms in which substance occurs in nature.

HARD

Chemistry>Inorganic Chemistry>The s-Block Elements>Some Important Compounds of Magnesium and Calcium