Inorganic Chemistry Answers

Question 6 : Which of these is not a group V element?
Calcium
Nirogen
Arsenic
Phosphorus

Question 7 : Halogen means-------------
reducing agent
oxidizing agent
bleaching agent
salt producer

Question 8 : Nitrogen is used for all but one of the following
freezing of foodstuffs
freeze grinding of normally soft and rubbery materials
in making fire works
in the packaging of processed foods

Question 9 : Deficiency of one of these leads to goitre in humans
Flourine
Iodine
Chlorine
Bromine

Question 10 : One of these statements is not true of oxides of halogen.
All oxides of halogens have positive free energies of formation
Chlorine oxides are used as bleaching agents
Except for that of iodine all oxides tend to be explosive
The higher oxides tend to be more stable than the lower

Question 1 : Teflon is form from a derivative of-------------
Chlorine
Iodine
Bromine
Flourine

Question 2 : The thermal stability of hydrogen halides-------------------
has no fix pattern across the group
is constant across the group
decreases from HF to HI
increases from HF to HI

Question 3 : Which of these halogens shows no basic properties
Flourine
Bromine
Chlorine
Iodine

Question 4 : A derivative of ------------- is used in making photographic plates
Flourine
Iodine
Bromine
Chlorine

Question 5 : One of these is not a pseudo halogen.
Teflon
selenocyanogen
cyanogen
thiocyanogen

Question 16 : Which of these is true of interstitial carbide?
they are non stoichiometric compound
they are soluble compounds
They are binary compounds
they are amorphous compounds

Question 17 : Lead dioxide is used as ----
anti knock
dentoator
gun powder
bleach

Question 18 : Which of the group V oxoacids is manufactured by Ostwald process?
nitric acid
nitrous oxide
dinitrogen tetraoxide
nitrogen hydroxide

Question 19 : Which of the group V metals can not be obtained from its sulphide ore?
lead
Bismouth
phosphorus
Nitrogen

Question 20 : Which of the following is responsible for the easy hydrolysis of lead halides ?
availability of lone pair of electron in P orbital
completely filled d orbitals by electron
Availability of d-orbitals and low bond energy of Pb-H bond
availability of lone pair of electron in d orbital

Question 11 : Which of these is not a carbide?
dative
covalent
interstitial
ionic

Question 12 : Silicates are salts of----
silicon tetraoxide
Silica gel
tetrachloro silicon
Crystaamite

Question 13 : Which of these is not a raw material for the cement manufacture?
lime
silica
Silicate
alumina

Question 14 : When carbon is linked to elements of lower or approximately the same electronegativity,the binary compounds formed are termed
hydroxides
halides
carbides
oxides

Question 15 : Which of the group V elements give only one oxidation state?
bismouth
phosphorus
nitrogen
lead

Question 6 : The heavier elements of group IV functions as------
lewis acid
Lowry base
lewis base
Lowry acid

Question 7 : Which of these is not an interstitial carbide?
tungsten carbide
titanium carbide
Vanadium carbide
boron carbide

Question 8 : One of these is not a form of silica
cristobalite
tridymite
Flint
Freons

Question 9 : Zeolites is used in water as----------
softener
purifiers
disinfectants
oxidants

Question 10 : Which of these is an example of covalent carbides?
TiC
tetrachloro silicon
dicloro silicon
SiC

Question 1 : Mixed chloroflorocarbons are known as ---------------
teflon
halides
Freons
carbenes

Question 2 : The following are crystaline forms of silica, except------------
tridymite
quartz
cristobalite
Crystaamite

Question 3 : Aqua regia is a mixture of Nitric acid and----------------
concentrated Hydrochloric acid
conc sulphuric acid
limewater
water

Question 4 : Solid CO2 is known as----
dry ice
hydrocarbon
Teflon
carbene

Question 5 : The purest form of silicon dioxide is----
cristobalite
silibolite
rock crystal
silicates

Why were the compounds of noble gases discovered late? Why do noble gases
form compounds only with oxygen and fluorine?

A wellknown mineral flourite is chemicallycalciumfloride.itis knownthat in one unit cell of this mineral there are 4ca2+ ions and 8fnegative ions and that ca2+ions are arrangedin a fcc lattice.The f_ions fill all the tetrahedral holesin fcc latticeof ca2+ions.The edge length if unitcell is 5.46×10^-8 cm in length.Thedensity of the.solid is 3.18gcm-3 .use thus information to calculate Avogadro;s number.(molarmass of caF2=78.8)

After a long night of carousing with some of his fellow "hounds" (consuming large quantities of rum, partaking in games of chance, and forming temporary alliances with young ladies to whom he had not been formally introduced) Mr. Baskerville Holmes wakes up the following morning feeling extremely dehydrated. He rushes down to the kitchen and drinks, in order, 850ml of orange juice, 700ml of grape juice, 650ml of cranberry-grape juice, and tops it all off with 900ml of pure distilled water. The citric acid (H3Cit) content in the juices was of 0.20 M for the orange juice, 0.27 M for the grape juice, and 0.25 M for the cranberry-grape juice. Prior to consuming all of this liquid, his stomach initially contains 90ml of gastric fluid with an HCI concentration of 0.10 M. What is the pH in Holmes' stomach after he has drank all of the liquids. Report your results to THREE significant figures.

20cm3 of a gaseous hydrocarbon X were exploded with 120cm3 of oxygen. After d explosion the volume of gases remaining was 90cm3 and this decreased to 50cm3 on treatment with aqueous potassium hydroxide. Calculate the molecular formula of X