G15 F15 HIGH Vision Tuition Academy Islamabad

G15 F15 HIGH Vision Tuition Academy Islamabad Here Is the page About HIGH Vision Tuition Academy .Here You will Find any solution about your secondary and intermediate level studies .

12/10/2017

Home tutor available , plz contact at 03415306806

06/06/2017

Q: Is current a scalar or a vector quantity? Because it is equal to V/R. Both of them are scalars. But also it has both, direction and magnitude ?
Ans: (I) Electric current I = q/t. As both charge and time are scalars, therefore electric current is a scalar quantity.(II) We show electric current in a wire by an arrow to indicate the direction of flow of positive charge. But such arrows are not vectors because they do not obey the laws of vector algebra. This point can be explained y referring to fig. The wire OA and OB carry currents of 3A and 4A respectively. The total current in the wire CO is 3 + 4 = 7A irrespective of the angle between the wires OA and OB. This is not surprising because the charge is conserved so that magnitudes of current in wires OA and OB must add to give the magnitude of current in wire CO.

17/12/2014

I strongly condemn the shameful act of attacking innocent school children. Allah give patience to the families on their losses (Ameen)

01/12/2014

(xv) Why the compounds of Sn+4 are covalent in nature while those of Sn+2 are ionic?
Ans; the valence electronic configuration of 4A group is ns2,np2. It means that these elements can show the oxidation state of 4 as well as 2.the top elements like C and Si always exist in +4 oxidation state while the bottom elements like Sn and Pb show +2 as well as +4 oxidation state.
As Sn+4 is small in size than Sn+2, and fajan,s rule state that small cation of high charge density has high polarizing tendency than larger cation of lower charge density. Therefore Sn+4 ion pull the electrons clouds more easily from the respective anion such that the electrons are effectively shared. That is why SnCl4 is covalent. Therefore SnCl4 is discrete molecule or molecular compound.
SnCl2 has more ionic character because of the higher size of Sn+2 ion. And exist in polymeric form.

01/12/2014

why carboxylic acids are stronger acids than phenol, alcohol and water but weaker than mineral acids.
Ans: Carboxylic acids as well as carboxylate ion both are stabilized by resonance. However, carboxylate ion is more stabilized by resonance because its contributing structures are exactly identical. Carboxylic acids are stronger acids than phenols. It can be understood by comparing the hybrid structures of carboxylate ion and phenoxide ions. In carboxylate ion, the negative charge is equally distributed over two electronegative atoms (oxygen atoms) while in phenoxide ion, it is present only on one oxygen. Thus, carboxylate ion is more stabilized as compared to phenoxide ion. Hence, carboxylic acids ionize to the greater extent than phenols furnishing higher concentration of H+ ions. Therefore carboxylic acids behave as stronger acids than phenols.similar is the case with alcohol and water

01/12/2014

Differentiate between alcohol and phenol?
Alcohol
1; when OH attached to aliphatic hydrocarbon, called alcohol.
2; examples are, CH3OH, CH3CH2OH
Alcohol have acidic properties but less than phenol.
alcohol does not react with NaOH and with FeCl3

Phenol
1;When OH attached to the aromatic carbon is called phenol.
C6H5OH.
phenol is more acidic than alcohol but less than carboxylic acid.
Phenol react with react with NaOH and with FeCl3.

01/12/2014

SUPPLEMENTARY RESULT OF SSC EXAMINATION (2014) WILL BE DECLARED ON 01/12/2014 AT 09:00 AM.

31/10/2014

when you are facing a bad time in your life and thinking where is ALLAH ? must remember the teacher is always quiet during a test

who want to be a sciencedaaan !!!
21/10/2014

who want to be a sciencedaaan !!!

Students of High Vision Tuition Academy at IEEE Sphageti Competition FAST University (17-Oct-2014)
17/10/2014

Students of High Vision Tuition Academy at IEEE Sphageti Competition FAST University (17-Oct-2014)

10/10/2014

Past Papers Of SSC / HSSC will upload soon , stay tune

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