`[CoC1_4]^(2o.)` is tetrahedral complex. Draw its box obital diagram. State which orbitals participate in hybridization.

Explain the structures of the complexes with box orbital diagram and orbital hybridisation. (Ni(CN_4)^(2-)

Draw qualitatively energy-level diagram showing d-orbital splitting in the octahedral environment. Predict the number of unpaired electrons in the complex [Fe(CN)_6]^(4-) . Is the complex diamagnetic or paramagnetic? Is it coloured? Explain.

Which species in each of the following pairs is better oxidizing agent under standard state conditions ? (standard potentials are given). Give reasons for your answer:- Br_(2(I)) (1.09V), or Au^(3+) (1.4V)

The figure shows the elliptical orbit of a planet about the sun S. An ellipse is the curve obtained when a cone is cut by an inclined plane. It has two focal points. The sum of the distances to the two focal points from every point on the curve is constant. F_1 " and " F_2 are the two focal points of the ellipse . The shaded area CF_1D is twice the shaded area AF_1B. t_1 is the time taken by the planet to move from C to D and t_2 is the time to move from A to B Which laws do we understand from the above diagram and description?

If the circumference of a circle changes at the rate of 0.2 cm/sec, then the rate of which its area is changing, when its radius is 8 cm is........ A) 0.8 cm^2 /sec B) 0.4 cm^2 /sec C) 1.6 cm^2 /sec D) 3.2 cm^2 /sec

Which of the following Species are reducing agents? Arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis. K (-2.93V), Br_2(1.09V), Mg(-2.36V), Ce^(3o+)(1.61V), Ti^(2o+)(-0.37V), Ag^(o+)(0.8 V), Ni (-0.23V).

Select proper alternative and complete the following paragraph. (NASA, ISRO, Apollo-2, Stones , manned Luna 2 , ummanned , Chandrayaan-1 , USA, Soviet Union , India) The spacerafts in the Luna series sent by ……….. reached near the moon. ............ , launched in 1959 was first craft in this series . Till 1975, 15 spacecrafts were sent to moon, which made chemical analysis of the moon and also measured its gravity , density and radiations. Last four crafts even landed on the moon and brought the samples of ................. from the surface of the moon for analysis in the laboratories . America also executed moon missions in the duration of 1962 to 1972 . The speciality of these missions was that some of these were .......... missions . In July ,1969 , Neil Armstrong become the first human to step on the moon. In 2008 , ........... launched ............ and placed it into an orbit around the moon . It obtained useful information of moon for about a year.

Give the formula of a compound in which carbon exhibit an oxidation state of (1) +4 (2) +2 (3) -4

Identify oxidising agents and arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis AI (-1.66V), AI^(3o+)(-1.66V),CI_2 (1.36V) , Cd^(2o+)(-0.4V), Fe(-0.44V), I_2(0.54V) , Br^(o-)(1.09V).