Tell the bond angles of following

BrF3,  TeCl4, H2S

I need the exact ones and not the ones calculated by state of hybridisation.

(1) Classical smog is a mixture of smog, fog and SO2

(2) Photochemical smog is made up of O3, Nitiric oxide, acrolein, formaldehyde and peroxyacetyl(PAN)

(3) CFC's cause greenhouse effect

(4) DDT is basically used to control the damages caused by insects, rodents, weeds and various crop diseases.

and Eutrophication is due to the presence of excessive nutrients in any water body due to inflow of nutrients from fertilzers that results in the increase of phosphate ions in water..

so no connection between DDT and Eutrophication

Hence the answer is (4)

Here I am....

Distance of the vertex from the centre of trianlgle= m

F=k q1 q2/r^2

Solving we get F= 10.8 N

Now net force on 2uC charge placed at the centre O= 2F + 2Fcos60 + 2Fcos60

[ forces by charges on A and E add up, forces by charges on F and C add up , forces by charges on A and D add up]

Net Force= 4*F

                 =4*10.8

                 =43.2 N

my answer was only fr

Q-(2)

If    is a bijection, then exists such that

    for all

the result   is a direct consequence of the property mentioned above

Acc to answer second curve should be x=4y-2 rather than

find the intersection point of both the curves

the points are (2,1) and (-1, 1/4)

Required area=

solve it and the answer comes out to be sq units

.....(1)

Replace x by (pi-x)

   ......(2)

Add (1) and (2)

Multiply and divide by (secx-tanx)

Hope u can further solve it now

okay okay right... sahil,,,, Cl2 has max and I2 has minimun... the data is given below

                                                          F-F                           Cl-Cl                      Br-Br                    I-I

Bond dissociation enthalpy        158                          242.6                   192.8                      151.1

(kJ/mol)                

cyclopropane + H2

                                   catalyst- Ni ,

min -F2

max- Cl2

this is because of large electron-electron repulsion among the lone pairs in F2 molecule as compared to Cl2.

so the bond in F2 becomes weak and is easier to break leading to its minimum bond dissociation enthalpy.