Assertion : Complexes of `MX_6` and `MX_5L` type (X and L are unidentate) do not show geometrical isomerism. Reason : Geometrical isomerism is not shown be complexes of coordin-ation number 6.

Which type of complexes do not show geometrical isomerism ?

True of False : All tetrahedral complexes show geometrical isomerism.

What type of isomerism is shown by the following complex , [Co(NH_3)_6][Cr(CN)_6] ?

The complexes [Co(NH_3)_6] [Cr(CN)_6] and [Cr(NH_3)_6] [Co(CN)_6] are examples of coordination isomerism/ coordination position isamerism.

Assertion : Lanthanoids show a limited number of oxidation states whereas actinoids show a large number of oxidation states. Reason : Energy gap between 4f, 5d and 6s subshells is small whereas that between 5f. 6d and 7s subshells is large.

The complexes [Co(NH_3)_6][Cr(CN)_6] and [Cr(NH_3)_6] [Co(CN)_6] are the examples of which type of isomerism ?

Assertion : Actinoids form relatively less stable complexes as compared to lanthanoids. Reason : Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.

If l and m are variable real numbers such that 5l^2-4lm+6m^2+3l=0 , then the variable line lx+my=1 always touches a fixed parabola, whose axis is parallel to the X-axis. If (c,d) is the focus of the parabola , then the value of 2^|d-c| is

A ray of light comes light comes along the line L = 0 and strikes the plane mirror kept along the plane P = 0 at B. A(2, 1, 6) is a point on the line L = 0 whose image about P = 0 is A' . It is given that L = 0 is (x-2)/(3)= (y-1)/(4)= (z-6)/(5) and P =0 is x+y-2z=3 . The coordinates of B are