In which of the following pairs, both the species are not isostructural ?

Amongst the following the total number of species NOT having eight electrons around central atom in its outermost shell, is \(NH _3, AlCl _3, BeCl _2, CCl _4, PCl _5:\)

A reaction having equal energies of activation for forward and reverse reactions has

Which one of the following statements is correct when \(SO_2\) is passed through acidified \(K_2Cr_2O_7\) solution?

Which of the following statements is not true for halogens ?

The outer orbitals of \(C\) in ethene molecule can be considered to be hybridized to give three equivalent \(sp^2\) orbitals. The total number of sigma \((\sigma )\) and pi \((\pi )\) bonds in ethene molecule is

Which of the following pairs of ions is isoelectronic and isostructural ?

The current passing through the battery in the given circuit, is :

Increase in temperature of a gas filled in a container would lead to

Which of the following regions of the brain is incorrectly paired with its function?

Select the incorrect statements with reference to Rh grouping :
A. Erythroblastosis foetalis is a condition observed having foetus with \(Rh ^{-v e}\) blood and mother with Rh \(+v e\) blood.
B. Rh antigen is observed on RBCs in the majority of human beings.
C. Before blood transfusion, Rh group should also be matched.
D. Rh incompatibility is observed when a pregnant mother is \(Rh ^{-v e}\) and the foetus is \(Rh ^{+v e}\).
E. Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the second child.
Choose the answer from the options given below :

If the longest wavelength in the ultraviolet region of hydrogen spectrum is \(\lambda_{0}\) then the shortest wavelength in its infrared region is

The magnetic flux linked with a coil (in \(Wb\)) is given by the equation \(\phi=5 t^{2}+3 t+16\) The magnitude of induced emf in the coil at the fourth second will be (In \(V\))