Wednesday, 18 December 2013
Sunday, 15 December 2013
ٹیچرز کے احترام اور محنت سے ہی امتحان میں پاس ہو سکتے ہیں- یاد رکھیں با ادب با نصیب بے ادب بے نصیب
ٹیچرز کے احترام اور محنت سے ہی امتحان میں پاس ہو سکتے ہیں- یاد رکھیں با ادب با نصیب بے ادب بے نصیب
جو کلاس روم میں نقل کرے گا وہ امتحان میں فیل ہو جاۓ گا اس لیے اچھے نمبرز سے پاس ہونے کے لیے ان تمام سوالوں کو خود یاد کریں -نقل کرنا چھوڑ دیں
جو کلاس روم میں نقل کرے گا وہ امتحان میں فیل ہو جاۓ گا اس لیے اچھے نمبرز سے پاس ہونے کے لیے ان تمام سوالوں کو خود یاد کریں -نقل کرنا چھوڑ دیں
ٹیچرز کے احترام اور محنت سے ہی امتحان میں پاس ہو سکتے ہیں- یاد رکھیں با ادب با نصیب بے ادب بے نصیب
ٹیچرز کے احترام اور محنت سے ہی امتحان میں پاس ہو سکتے ہیں- یاد رکھیں با ادب با نصیب بے ادب بے نصیب
Monday, 9 December 2013
questions
Metallic bond
Intermolecular forces
Van der waal forces
dipole- dipole forces/ interaction
hydrogen bonding
malleability
ductility
diffusion
effusion
pressure
pascal
standard atmospheric pressure ( atm)
density
boyle's law
charles' law
absolute tempreture scale / Kelvin scale / Absolute zero
evaporation
condensation
vapour pressure
boiling point
freezing point
melting point
amorphous solids
crystalline solids
allotropy
transition tempreture
solution
aqeuous solution
solute
solvent
saturated solution
unsaturated solution
super saturated solution
dilute solution
concentrated solution
conentration
percentage unit of concentration
molarity / molar solution
colloid solution
suspension
tyndal effect
why do atoms react?
how do atoms follow octet rule?
which electrons are involve chemical bonding?
ionic compounds are solids.justify?
ionic compound conduct electricity in solution or molten stete. why?
why ionic compounds have high melting and bioling point?
why ionic compound easily soluble in water?
what type of elements have tendency of sharing of electrons?
descrie two conditions for formation of covalent bond?
more electronegative elements can form bonds between temselves.justify?
what type of bond is formed in nitrogen molecule?
metals are good conductor of electricity.why?
why hold of nucleus over electrons in metals weak?
why electrons move freely in metals?
if repulsive forces dominate to attractive forces will a covalent bond form?
why Boron floride electron deficient?
what type of electrons pair are good donor?
why oxygen not form polar covalent bond?
why water has polar covalent bond?
why HCl has dipole-dipole force of attraction?/ what type of attractive forces exist in HCl?
why a covalent bond become polar?
what is relationship between electronegativity and polarity?
why does ice float on water?
Why the gases are compressible?
Why are the densities of gases lower than that of liquids?
Why the rate of diffusion of gases is rapid than that of liquids?
Why are the rates of diffusion in liquids slower than that of gases?
Why does rate of diffusion increase with increase of temperature?
Why does evaporation increase with the increase of temperature?
Why is vapor pressure higher at high temperature?
Is the Boyle’s law applicable to liquids?
Is the Boyle’s law valid at very high temperature?
Which parameter is kept constant in Charle’s law?
Does Kelvin scale show a negative temperature?
Whether the density of a gas decreases on cooling?
Can you cool a gas by increasing its volume?
When a gas is allowed to expend, what will be its effect on its temperature?
Why is the boiling point of water higher than that of alcohol?
Why are the liquid mobile?
In which form sulfur exists at 100c?
Which form of sulfur exists at room temperature?
Why is white tin available at room temperature?
Which is lighter one aluminum or gold?
Which allotropic form of carbon is stable at room temperature (25c)?
State whether allotropy is shown by elements or compounds or both?
What do you mean, like dissolves like? Explain with examples.
What do you mean by volume/volume %?
Why is iodine soluble in CCl4 and not in water?
Why test tube becomes cold when KNO3 is dissolved in water?
Can colloids be separated by filtration, if not why?
why are colloids stable and show tyndal effect?
Wednesday, 6 November 2013
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