Inorganic Chemistry Answers

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

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 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

The density of a wood is 0.79g/cm3. If the empirical formula of wood is CH2O. Calculate the mass of water produced when a log of dimension 12cm *14cm* 25cm is burnt completely

Who arranged elements in order of increasing atomic weight which spiraled round a cylinder from bottom to top

Give scientific reasons:(1)ionization potential of nitrogen is greater than that of oxygen.(2) sigma bond is stronger than pi bond.(3) unlike gases,liquids and solids can not be compressed easily.

21g of sodium carbonate is dissolved in water and the solution made up to 500cm cube. Find the molarity of the solution. Naco3

What is the gram of 1.22 mol/dm cube of sodium hydroxide (na=23,o=16,h=1) naoh

What is the molar concentration of solution of 162.8g of calcium hydroxide dissolved completely in 1000cm cube of distilled water (ca=40,o=16,h=1)