Name: Problems With Concrete
Uploaded: 2019-07-19
Duration: 3 min 17 s
Description: There is hardly any major original civil construction work where structural concrete is not used. But it has some environmental problems. Learn more.

Question

Match the elements given in Column I with the properties mentioned in Column II.

	Column I		Column II
(a)	$Li$	(p)	Insoluble sulphate
(b)	$Na$	(q)	Strongest monoacidic base
(c)	$Ca$	(r)	Most negative $E^{⊝}$ value among alkali metals
(d)	$Ba$	(s)	Insoluble oxalate
		(t)	$6 s^{2}$ outer electronic configuration

Accepted Answer

(a) $Li$ – Most negative $E °$ among alkali metals
Due to very high hydration energy, the resulting $E °$ is most negative.

(b) $Li$ – Strongest monoacidic base
Alkalies are more acidic than alkaline earth metals. $LiOH$ has a covalent character.

(c) $Ca$ – insoluble oxalate
Calcium oxalate is insoluble in water.

(d) Ba – Insoluble sulphate
Hydration energy decreases as the size of cation increases.
- $6 s^{2}$ outer electronic configuration
$56 - Ba = {Is}^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6} 3 d^{10}, 4 s^{2} 4 p^{6} 4 d^{10}, 5 s^{2} 5 p^{6}, 6 s^{2}$

	Column I		Column II
(a)	$Li$	(r)	Most negative E⁰value among alkali metals
(b)	$Na$	(q)	Strongest monoacidic base
(c)	$Ca$	(s)	Insoluble oxalate
(d)	$Ba$	(p) (t)	Insoluble sulphate $6 s^{2}$ outer electronic configuration

NCERT Solutions for Chapter: The s-Block Elements, Exercise 1: Matching Type

NCERT Chemistry Solutions for Exercise - NCERT Solutions for Chapter: The s-Block Elements, Exercise 1: Matching Type

Questions from NCERT Solutions for Chapter: The s-Block Elements, Exercise 1: Matching Type with Hints & Solutions

Learn and Prepare for any exam you want !

	Column I		Column II
(a)	${CaCO}_{3}$	(p)	Dentistry, ornamental work
(b)	$Ca (OH)_{2}$	(q)	Manufacture of sodium carbonate from caustic soda
(c)	$CaO$	(r)	Manufacture of high-quality paper
(d)	${CaSO}_{4}$	(s)	Used in whitewashing

	Column I		Column II
(a)	$Cs$	(p)	Apple green
(b)	$Na$	(q)	Violet
(c)	$K$	(r)	Brick red
(d)	$Ca$	(s)	Yellow
(e)	$Sr$	(t)	Crimson red
(f)	$Ba$	(u)	Blue