COORDINATE GEOMETRY | LECTURE (09) | EXAMPLES ON SECTION FORMULA | KARAN SONI

Class 11 || Basic of Coordinate Geometry || IIT-JEE || Board Exams

If D ,Ea n dF are the mid-points of sides BC, CA and AB respectively of a A B C , then using coordinate geometry prove that Area of △DEF= 1/4 (Area of △ABC)

To determine the young's modulus of a wire , the formula is Y = (F)/( A) . (L)/ ( Delta l) , where L = l ength , A = area of cross - section of the wire , DeltaL = change in the length of the wire when streched with a force F . Find the conversion factor to change it from CGS t o MKS system.

An organic compound containing bromine gave the following results: (i) 0.125 g of the compound on complete combustion gave 0.1 g of CO_2 and 0.051 g of water. (ii) 0.185 g of the compound gave 0.32 g of AgBr. Sony Calculate the empirical formula of the compound.

Write the Lewis dot structural formula for each of the following Also give the formula of a neutral moleule which has the same geometry and the same arrangement of the bonding electrons as in each of the following (a) O_(2)^(2-) (b) O_(3)^(2-) (c ) CN^(Theta) (d) NCS^(Theta) .

When a coordination compound CoCI_(3).6NH_(3) " is mixed with " AgNO_(3) , 3 moles of AgCI are precipitated per mole of the compound. Write (i) Structural formula of the complex (ii) IUPAC name of the complex

A parabolic section of wire OA is located in the x-y plane and carries current I=12 A . A uniform magnetic field B=4.0 T making an angle 60^(@) with x axis exists in x-y plane. Calculate the magnetic force on the wire OA. Coordinates of A are (0.25 m, 1 m)

Velence bond theroy describes the bonding in complexs in terms of coordinate -covalent bond resulting from overlap filled ligand orbitals with vacant metal hybrid orbitals This theory explains magnetic behaviour and geometrical shape of coordination compounds Magnetic moment of a complex compound can be determined experimentally and theoretically by using spin only formula Magnetic moment sqrtn (n+2)BM (where n = No. unpaired electrons) . Ni^(2+) cation combines with a uninegative monodentate ligand X^(Θ) to form paramagnetic complex [NiCI_(4)]^(2-) The number of unpaired electrons(s) in central metal cation and geometry of this complex respectively are (a) One,tetrahedral (b) Two,tetrahedral (c ) One,square planar (d) Two, square planar .