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اب آپکا بھی ہوگا اپنا گھر رابعہ ہاؤسنگ لاہور میں
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2nd year chemistry guess.

Chapter 1.
Long question.
Position of hydrogen.oxides hydride and halide.
Short question.
Periods in periodic table.merits and demerits of mendeleeve,s periodic table..metallic oxides are basic and non metallic are acidic why?.what is lanthanide contraction.2nd electron affinity is exothermic why?.hydration energy it's factors?. Amphoteric oxides. And question number 7 to 13 from exercise.
Chapter 2.
Long questions.
Peculiar behavior of lithium.
Down cell and diaphragm cell.
Short questions.
Discuss solubility of sulphates and carbonates. Reaction of alkali metals with oxygen and water. Lime mortar. How plaster of Paris is prepared from gypsum. Slacking of lime. Alkali metals are strong reducing agents why? How KO2 can be used by mountaineer? Solution of Na2CO3 is basic why?
And question num 7(b) and 9 (b) from exercise.

Chapter 3.Long question.
Reactions of aluminium and uses.
Silicones,silicates.semiconductor.
Short questions.
What is inert pair effect. How borax is prepared by to methods.Uses of borax and boric acid.effect of heat on borax ..Uses of sodium silicate.
CO2 is gas while SiO2 is solid why? Peculiar behavior of carbon. Chemical garden. Why silicones are more proffered over petroleum. What is basic lead and lead chromate.borax bead test.ortho boric acid is mono basic acid why.

Chapter 4.
Short questions.
What is laughing gas it is prepared.
Aqua regia.Uses of nitric acid.
Reaction of nitric acid with bases carbon,phosphorus,sulphur,Cu ,Zn, Sn.
Reaction of NO2 with water and with phosphorus .ring test. And allotropes of phosphorus.Reaction of P2O3 and P2O5 with cold and hot water.P2O5 as dehydrating agent.similarities and dissimilarities of sulphur and oxygen. Reaction of sulphuric acid( All)

Chapter 5.
Long questions.
Peculiar behavior of fluorine.properties of halogen halides. Bleaching powder preparation and reactions.
Uses of halogens.
Short questions.
Halogens are oxidizing agents why? How I2O5 can be used for quantitative analysis of CO. What is available chlorine. Uses of fluorine,chlorine,bromine and iodine separate .
How xenon tetraoxide is prepared. Uses of noble gases.
Question number 4 and 6(b) 8(b) from exercise.

Chapter 06.
Short questions.
Typical and non typical transition elements. Melting point and its trend. Binding energy and its trend.paramagnetism.why transition elements compounds show colors. What are ligands. What is co ordination sphere. What are chelates. Classification of steel. Galvanizing of zinc. And cathode coating. Chromyl chloride test. How KMnO4 is prepared by two methods.How chromates are converted into dichromates. Write reactions of KMnO4 with oxalic acid ferrous sulphate and KI

Chapter 07
Long questions.
Cracking, reforming, geometrical isomerism.
Short questions.
What is peculiar nature of carbon.
How anthracite is prepared?
What is natural gas.
What is functional group? Give examples.
Metamerism.tautomerism.functional group isomerism.
Question 15 from exercise

Chapter 08.
Acidic nature, halogenation of alkane.kolbe,s electrolytic method,
Short questions.
Exercise

Chapter 9.
Long questions.
Friedal Crafts reactions.
Nitration sulphonation.
Stability of benzene.
Kekule structure and points favoring it.
Short questions.
Differentiate between mono and polycyclic aromatic compounds.
Prepare benzene by 2 methods specially from alkanes.
Prepare global,italic acid,maliec acid benzoic acid and meta nitrochloro benzene from benzene.


Chapter 10.
Long questions.
SN1 ,SN2 , E1 ,E2.
Reactions of Grignard,s reagent.
Short questions.
Reactivity of alkyl halides.
Prepare alkyl halide by two methods.
Electrophile,nucleophile.
Questions 8,12 from exercise.

Chapter 11.
Long questions.
Preparation of methanol.
Reactions of phenol.
Short questions.
Acidic nature of phenol.
Lucas test.
Oxidation and hydration of alcohol.
Williamson,s synthesis.
Question 10,11,12 from exercise

Chapter 12.
Long questions.
Preparation of formaldehyde and acetaldehyde.
Aldol condensation and cannizaro reaction.
Iodoform reaction.
Short questions.
Prepare lactic acid from ethanol.
Addition of sodium sulphite in carbonyl compounds.
Reduction of carbonyl compounds.
Uses of acetaldehyde.
Question num 16,17 from exercise.

Chapter 13.
Long questions.
Ester formation, acid halide and amide formation.
Reactions of acetic acid.
Short questions.
Reaction of carboxylic acid with bases.
Differentiate between aromatic carboxylic acid and fatty acids.
Amino acids are amphoteric.
Strecker synthesis.
Differentiate between polypeptide and protein.
What is zwitter ion.
Prepare acetic acid from ethyne.

Chapter 14.
Difference between addition and condensation polymerization
POLYAMIDE resins
Disacharides
Glycogin and starch
Denaturation and importance of protein
Sponification
Sponification number
Iodine number
Factors effecting enzymes
Steroid
Diffrentiate between DNA and RNA

Chapter 15.
Macro and micro nutrients
Phosphorus ki importance and prilling
Raw materials for cement
Heating

Chapter 16.
Exercise Q. 9 to 16

fluorine.pr

سنگاپور (نیوز ڈیسک) سنگاپور اینڈ ایشئین میتھس اولمپیئڈز (SASMO) میں زہین ترین طالب علم کے انتخاب کیلئے منعقد ہونے والے مقابلے کے درمیان پوچھے جانے والے سوال نے ساری دنیا کو چکرا کر رکھ دیا ہے اور اکثر لوگ تو یہ سوال کو پڑھتے ہی ہاتھ کھڑے کر دیتے ہیں جبکہ کچھ گھنٹوں غور و فکر کے بعد جواب کا کچھ نہ کچھ اندازہ لگا لیتے ہیں۔ آپ بھی ذرا اپنی ذہانت کا امتحان لیں۔ سوال یہ ہے۔
البرٹ اور برنارڈ نامی لڑکوں کی دوست شیرل ہے جس کی سالگرہ کے دن کے بارے میں دونوں جاننا چاہتے ہیں۔ شیرل دونوں کو بتاتی ہے کہ اس کی سالگرہ کی دس ممکنہ تاریخیں درج ذیل ہیں۔
مئی 15، مئی 16، مئی 19
جون 17، جون 18
جولائی 14، جولائی 16
اگست 14، اگست 15، اگست 17
اس کے بعد شیرل البرٹ کو صرف مہینہ جبکہ برنارڈ کو صرف دن بتاتی ہے۔
البرٹ کہتا ہے: مجھے پتہ ہے کہ برنارڈ کو بھی اس کا پتہ نہیں۔
برنارڈ کہتا ہے : پہلے تو مجھے پتہ نہیں تھا۔ لیکن اب میں جانتا ہوں۔
البرٹ کہتا ہے: تو پھر مجھے بھی پتہ ہے کہ شیرل کی سالگرہ کب ہے۔ تو اب آپ بتائیے کہ شیرل کی سالگرہ کب ہے؟

Lets see who is the most genius

sunday(18-01-2015) ko kisi b session ki math Ki koi class Ne ho g.Usman Ali (Lecturer math)

Undefined Operations

All of these are "undefined":

"Undefined" Operations
0 × ∞
0 × -∞
∞ + -∞
∞ - ∞
∞ / ∞
∞0
1∞