File No.06/04/21/07/2014
VII CLASS - IIT/N.T.S.E FOUNDATION - OLYMPIAD
ANDHRA PRADESH - TELANGANA
2014-2015 PROGRAM M E
2nd-CHAPTER-SOLUTION
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2. LANGUAGE OF CHEMISTRY
1.
Aluminium - Al, Helium - He.
2.
Latin name of Iron is ferrum
3.
The symbol of Na represents the short hand notation of Sodium.
4.
The symbol of sb stands for Stibium.
5.
Fe is an element
6.
Sulphuric acid possess hetero atomic molecules.
8.
He acts as a molecule
9.
O does not have individual existence.
10.
The symbol of mercury is Hg.
11.
Ne exists as a molecule as well as atom.
12.
The symbol of Polonium is Po.
13.
The element having symbol from its Latin name is Mercury
14.
Gold - symbol - Au
15.
Atom possess individual existence
16
The gaseous element at room temperature is Xenon
17.
The formula of washing soda is Na2CO3
18.
The formula of baking powder is NaHCO3
19.
The symbol of elements which are derived from name of countries / cities Bk.
20.
NaCl - formula
1.
The Elements present in a compound are named in order of symbols appearing in formula.
2.
Example for compound SO2.
3.
The compound that posses monoatomic molecule are S8, O3, P4.
CHALLENGER
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File No.06/04/21/07/2014
VII CLASS - IIT/N.T.S.E FOUNDATION - OLYMPIAD
4.
Bohrium is named after the scientist
5.
Ni is symbol for Nickel
6.
The symbol for tung sten is W
7.
The element named after countries is/are Berkley, Californium, Polonium.
8.
Mercury is the liquid metal.
9.
The short hand representation of amolecule of a substance in terms of symbols and subscript
numbers is known as the formula
Atoms of different elements combine in a certain fixed ratio to form a compound
All chemical compound are represented by their respective formula
10.
Calcium carbonate is a compound.
12.
Symbols were first used by swedish chemist Berzelius.
13.
Cl is symbol for Chlorine
14.
Bromine is liquid non-metal.
15.
Graphite is an element.
16.
The symbol of Barium is Ba
17.
Yttrium - Yt
18.
The symbol of Fluorine is F.
19.
The elements named after planets are Np
20.
The elements that possess symbols of their latin name are Lead, Silver, Gold.
BRAIN TWISTERS
2014 - 2015
1.
The elements named after scientists are Cm, No and Es.
2.
Regarding Na the correct statements are Its english name is sodium and Its latin name is
Natrium
3.
Au is Gold and Auram
4.
Sulphur and Nitrogen are represented by single alphabet?
5.
The elements with first two letters of their english names are Helium and Gallium.
6.
a) Elements with symbols derived form latin names - Kalium
b) Elements named after scientists - Rutherfordium
c) Elements named after countries - Polonium, Californium
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d) Elements named after planets - Uranium
7.
a) Sulphur - S
b) Copper - Cu
c) Titanium - Ti
d) Scandium - Sc
CHALLENGER
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CHEMISTRY - CHAPTER SOLUTIONS - 2
File No.06/04/21/07/2014
8.
VII CLASS - IIT/N.T.S.E FOUNDATION - OLYMPIAD
a) Tin - Sn
b) Tungsten - W
c) Gold - Au
d) Silver - Ag
9.
a) Mercury - Hg
b) Silver - Ag
c) Tin - Sn
d) Lead - Pb
10.
a) Pt - Platinum
b) Pu - Name of planet
c) P - Phosphorous
d) Po - Name of place
11.
CO - Carbon monoxide, SO3 - Sulphur trioxide.
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Reason does not explain assertion
12.
Atoms does not exist individually and atoms are stable.
13.
He, Ne exist individually these are more stable.
14.
Sodium latin name is Natrium and its symbol is Na.
15.
Symbol of astatine - As
16.
Selenium - Se, Silicon - Si.
17.
Antimony - Stibium - Sb.
18.
Helium - He
19.
Oxygen - O.
20.
H2SO4 - 4 atoms.
1.
Sodium oxalate formula is Na2C2O4.
2.
P2O5 represents a molecule contains 2 atoms of P and 5 atoms of O.
3.
Given formula of chloride of metal is MCl3 in this M+3
2014 - 2015
So, the formula of phosphate of MPO4.
4.
Sulphur element exist as S8. So, its atomicity is 8.
5.
According to dalton’s atomic theory all matter is mate up of very small particles which
cannot be further broken down. These particles are called atoms.
CHALLENGER
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File No.06/04/21/07/2014
VII CLASS - IIT/N.T.S.E FOUNDATION - OLYMPIAD
6.
The correct formula of aluminium sulphate is Al2(SO4)3.
7.
Atoms present in CoCl3.6H2O
1 Co atom + 3Cl atoms + 6 x 2H atoms + 6O atoms = 22 atoms.
8.
Symbol of mercury -Hg
Antimony symbol - Sb
tuny sten symbol - W.
9.
Silica formula is SiO2, it is a tri atomic molecule.
10.
Phosphine formula is PH3 so, no. of phosphorous atoms present is one.
11.
Potassium perchloride formula is KClO3
Sulphuric acid - H2SO4
Sodium hydroxide - NaOH
Carbon monoxide - CO.
12.
Trival name of sodium chloride (NaCl) is table salt.
13.
Common name of nitrogen tri hydride is NH3-Ammonia.
14.
Formula of water is H2O, H.OH - Hydrogen hydroxide.
15.
Balanced chemical equation represents no.of atoms of each element is same on the side of
reactants and products 2KNO3  2KNO2 + O2.
It does not give information about physical states all reacting substances.
16.
Given equation N2 + 3H2  2 NH3.
gives information  one molecule of nitrogen and three molecules of hydrogen combine to
form two molecules of ammonia at same conditions of temperature and pressure.
i.e., 28g N2 and 6g of H2 combine to form 34g of NH3.
17.
2Mg + O2  2MgO..
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gives information about 48g of Mg and 32g of O 2 combine to form 80g of magnesium
oxide.
Iodine maximum valency is +7, compound (IF7).
19.
Na2CO3 + 2HCl  2NaCl + CO2 + H2O, 2H2S + SO2  2H2O + 3S, 4NH3 + 5O2
 4NO + 6H2O these 3 equations are balanced.
20.
The prefix and sufix in binary acids containing hydrogen and non-metal like hologen respectively are hydro and ic, for example HCl name is hydro chloric acid.
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18.
CHALLENGER
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CHEMISTRY - CHAPTER SOLUTIONS - 2