Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 95

MEDIUM

NDA & NA EE

IMPORTANT

Earn 100

Consider the following statements

$I .$ The main sources of bio fertilizers are bacteria, cyanobacteria and fungi.

$II .$ Bio fertilizer and green manures do not pollute the soil.

$III .$ Potash fertilizer is evaluated as $K_{2} O$ .

$IV .$ Phosphatic fertilizer content is expressed as $P_{2} O_{5}$ .

Select the correct statements using the codes given below.

50% studentsanswered this correctly

Important Questions on Some Important Chemical Compounds

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 104

Match List I and List II and select the correct answer using the codes given below the lists.

List I		List II
A.	Glass	1.	Soap
B.	Cement	2.	Super cooled liquid
C.	$C_{17} H_{35} COONa$	3.	Mixture
D.	Paper	4.	Cellulose

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 105

Match List I and List II and choose the correct answer by the codes given below the lists.

List I		List II
A.	Mercuric chloride	1.	$K_{2} {Cr}_{2} O_{7}$
B.	Mercurous chloride	2.	${HgCl}_{2}$
C.	Potassium chromate	3.	$K_{2} {CrO}_{4}$
D.	Potassium dichromate	4.	${Hg}_{2} {Cl}_{2}$

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 106

Match List I and List II and choose the correct answer by the codes given below the lists.

List I (Chemical compounds)		List II (Uses)
A.	Silver bromide	1.	Etching of glass
B.	Hydrogen peroxide	2.	Photography
C.	Hydrofluoric acid	3.	Purification of air
D.	Ozone	4.	Bleaching agent

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 107

Match List I and List II and choose the correct answer by the codes given below the lists.

List I		List II
A.	Uranium oxide	1.	Red
B.	Cuprous oxide	2.	Blue
C.	Cobalt oxide	3.	Green
D.	Chromium oxide	4.	Yellow

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 108

Match List I and List II and choose the correct answer by the codes given below the lists.

List I (Material)		List II (Important ingredient)
A.	Cement	1.	Sodium salt of fatty acids
B.	Glass	2.	Carbon black
C.	Ink	3.	Silica in the form of quartz
D.	Soap	4.	Aluminates and silicates of calcium

EASY

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 109

Match List I and List II and choose the correct answer by the codes given below the lists.

List I (Substance)		List II (Raw material)
A.	Glass	1.	Fat and caustic alkali
B.	Soap	2.	Cellulose fibre and gelatin
C.	Paper	3.	Silicates of calcium and aluminium
D.	Cement	4.	Silica

MEDIUM

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 110

Match List I and List II and choose the correct answer by the codes given below the lists.

List I (Fertilisers)		List II (Chemical formula)
A.	Urea	1.	${({NH}_{4})}_{2} {SO}_{4}$
B.	Nitrolim	2.	${NH}_{2} {CONH}_{2}$
C.	Thomas Slag	3.	${CaCN}_{2}$
D.	Sindri fertiliser	4.	${Ca}_{3} {({PO}_{4})}_{2} . {CaSiO}_{3}$

HARD

NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Chemistry>Chapter 11 - Some Important Chemical Compounds>Practice Exercise>Q 111

Which one among the following is the correct order of amount of lime

(CaO),

silica

({SiO}_{2})

alumina

({Al}_{2} O_{3})

and ferric oxide

({Fe}_{2} O_{3})

in Portland cement?