The transition metals generally form complex compounds due to
(A) Variable oxidation states
(B) High ionic charges
(C) Smaller size of metal ion
(D) Metallic conductivity
(E) Availability of d-orbitals
Choose the correct answer from the options given below :

Which one of the following complexes shows optical isomerism?

Lustre, electrical and thermal conductivity of metals can be explained by the theory of :

Match List I with List II

LIST I (Order)	LIST II (Units of k)
A. Zero order reactions	I. \(\backslash s^{-1}\)
B. 1st order	II. \(m \operatorname{mol}^{-2} L^2 s^{-1}\)
C. 2nd order	III. \(\operatorname{mol} L^{-1} s^{-1}\)
D. 3rd order	IV. \(\backslash\) mol \(^{-1} L s^{-1}\)

Choose the correct answer from the options given below:

oxidation states of which of the following oxides are same?
(A) \(ClO_2\): +4
(B) \(Cl_2O_3\): +3
(C) \(BrO_2\): +4
(D) \(I_2O_4\): +5
(E) \(I_2O_5\): +5
Choose the correct answer from the options given below :

Read the passage carefully and answer the questions.
Electrochemistry is the study involving two types of processes. One type involves the production of electricity from the energy released during a spontaneous chemical reaction. Galvanic cells like Daniel cells are used to produce electricity from the redox reaction. Nernst equation of a galvanic cell gives the relation between the standard cell potential and the concentration of the species involved in the redox reaction. The second type of study involves the cells in which electrical energy is used to bring about the chemical reactions in a non-spontaneous process. The conductance of electrolytic solution depends on many factors including the nature of the electrolyte and the dimensions of the electrolytic cell.
What is the SI unit of conductivity?

Identify the type of defect in the above solid. (The image for the 'above solid' is missing but question asks to identify defect in 'the above solid')

The unit vector in the xy-plane, making an angle of \(60^{\circ}\) with the positive direction of x-axis is:

If |\(\vec{a}\)| = 8, |\(\vec{b}\)| = 3, and |\(\vec{a} \times \vec{b}\)| = 12, then the value of \(\vec{a} \cdot \vec{b}\) is:

\(\frac{d}{d x}\left(e^{2 \log _e x^3}\right)\) equals

Name a transition element which does not exhibit variable oxidation states

Read the paragraph given below and answer the question.
Sutton and Boveri argued that the pairing and separation of a pair of chromosomes would lead to the segregation of a pair of factors they carried. Sutton united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance. Following this synthesis of ideas, experimental verification of the chromosomal theory of inheritance by Thomas Hunt Morgan and his colleagues, led to discovering the basis for the variation that sexual reproduction produced. Morgan worked with the tiny fruit files, which were found very suitable for such studies. They could be grown on simple synthetic medium in the laboratory. They complete their life cycle in a short span of time and a single mating could produce a large number of progeny flies. Also, there was a clear differentiation of the sexes the male and female flies are easily distinguishable. Also, it has many types of hereditary variations that can be seen with low power microscopes.
Which statement is incorrect with respect to Drosophila.

The work function for a metal surface is 8.28 eV . The threshold wavelength for this metal surface is :