Inorganic Chemistry Answers

Question 11 : Which of these compounds is used in toothpastes as a source of fluoride ion to harden dental enamel
stannous fluoride
germanium fluoride
carbon tetra fluoride
Silicate fluoride

Question 12 : Silicones are a group of-------------
Organosilicon polymers
tetrachloro silicate polymer
silicon dioxide
organosilicates

Question 13 : Which form of phosphorous is most reactive?
red
white
brown
black

Question 14 : Which of these group V elements form the most stable pentahalides
B
P
As
Sb

Question 15 : Which of the group V element forms alloys with metals?
Ar
Bi
Sb
N

Question 6 : The purest form of silicon dioxide is-----

rock crystal

cristobalite

silicates

silibolite


Question 7 : Which of the following trihalides of nitrogen is stable?

chloride

bromide

floride

iodide


Question 8 : Which of the following is used in baking powder and toothpastes?

calcium phosphate

Calcium chloride

sodium tripolyphosphate

nitric acid


Question 9 : Glass is produced from mixture of silicates mainly of

K and Ca

Na and Al

K and Al

Na and Ca


Question 10 : Which of these will give a positive brown ring test?

nitric oxide

nitric dioxide

nitrogen oxide

dinitrogen tetraoxide

Question 1 : Which of the following is an oxidizing agent?
Carbon monoxide
lead dioxide
gemenium oxide
tin dioxide

Question 2 : The following are crystaline forms of silica except
quartz
cristobalite
tridymite
crystaamite

Question 3 : Which of the following is used in matches and fireworks?
nitrogen
arsenic
bismuth
red phosphorous

Question 4 : Which of the group V elements form the pp- pp multiple bonds?
Bi
N
Ar
Sb

Question 5 : Which of the following is used to decolourize bottle glasses
Sodium arsenate
arsenic acid
arsenic hydride
arsenic oxide

Question 16 : Artificial graphite can be produced on a large scale by heating
Carbon with silica
Carbon with silica
Coke with silica
Charcoal with silica

Question 17 : Diamond behaves as an insulator because------
It is used as an jewelry
It is made of carbon
It is a solid
It does not have mobile electrons

Question 18 : Which of these elements of group IV can form compounds easily in +2 oxidation state
C
Pb
Ge
Si

Question 19 : Which of these is not a component of lead-acid battery?
spongy lead
lead chloride
tetrehydrooxsulphate(VI) aci
lead oxide

Question 20 : An example of amorphous form of carbon is-----
Graphite
Carbon monoxide
LampblacK
Diamond

Question 11 : Which of these is not a form of carbon?
carbon black
carbon hydride
Coke
charcoal

Question 12 : Which of these elements shows polymorphism?
Pb
Sn
Si
C

Question 13 : The two allotropies of carbon are------
Diamond and Charcoal
Charcoal and Coke
Diamond and Graphite
Coke and Diamond

Question 14 : Clays are esscentially alumina-silicates of -----
Na and K
Al or Si
Na or Ca
Ca and Si

Question 15 : Allotropy is the existence of elements in more than------
One hydride compound
One physical state
One form
One oxide compound

Question 6 : The three dimensional linkages makes diamond one of the
hardest
most beautiful
most expensive
slimmest

Question 7 : Which of these compounds is used as antiknock additives to petrol for internal combustion engines?
Tetramethyl lead
lead oxide
lead sulphate
lead chloride

Question 8 : The property by which elements form long chain compounds by single or multiple bond formation between atoms of the same elements is----
Catenation
Polymorphysm
Dention
Polimerization

Question 9 : Artificial diamond can be produced by quenching----
a solution ofsilicon in lead
a solution of carbon in iron
a solution of carbon in lead
a solution of carbon in tin

Question 10 : Which of these two elements are important components of semiconductors and transistors?
Sn and Pb
Si and Pb
,Ge and Sn
Si and Ge

Question 1 : Activated charcoal is used
in refrigeration
in jewellery
as decolourizing agent
in cutting

Question 2 : Which of these is used in making crucible?
coke
graphite
Diamond
coal

Question 3 : The structure of graphite is-----
Regular tetrahedral planar
Regular planar hexagonal
Irregular planar hexagonal
Irregular tetrahedral octagonal

Question 4 : Each carbon in Diamond is bonded to
4 Carbon atoms
3 Carbon atoms
2 Carbon atoms
6 Carbon atoms

Question 5 : High purity silicon is obtained from----------
Silicon dioxide
Silicon tetrachloride
Silicon hydroxide
Silicon dihydride

What if I have dissolved 10g of HA in propanol and I want to adjust pH by adding nitric acid, then will the particles react with acid in this case? I have a doubt that it might depend on the mass of particle.

a) Starting from Lewis structure, determine the hybridization types of the central (5)
atom of TeCl4 and ICl4

.
b) Write Born-Haber cycle for BaO crystal.

calculate ionisation energy of hydrogen atom in kJ mol1