For fixed radii of curvature of a lens, power is proportional to :

In a compound microscope, the distance between objective lens and eye lens is always:

Which of the following has the maximum penetration power ?

A very long straight wire carries a current (I) directed along positive Y-axis. A point charge +Q moves with velocity (v) along X -axis. The direction of force on the charge at point (5,0,0) m is

Which of the following statements is correct for a charged metallic shell?

Two point charges \( 3 \text{ } \mu\text{C} \) and \( -3 \text{ } \mu\text{C} \) are located at points \( A: (3 \text{ cm}, 0, 0) \) and \( B: (-3 \text{ cm}, 0, 0) \), respectively. The electric field at the origin is

In a cyclotron, if a deutron can gain a maximum energy of 40 MeV, then a proton can gain a maximum energy of _________

The hormone releasing IUDs function by:

Read the passage carefully and answer the questions:
The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the octahedral complex to yield three orbitals of lower energy, \(t_{2 g}\) set and two orbitals of higher energy, \(e_g\) set. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting and the energy separation is denoted by \(\Delta_0\). Thus energy of the two \(e_g\) orbitals will increase by \((3 / 5) \Delta_{\circ}\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_{ o }\) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong fields, in which case the splitting will be large, whereas others produce weak fields and consequently result in small splitting of \(d\) orbitals. Relative magnitude of crystal field splitting energy \(\Delta_{\circ}\) and pairing energy, \(P\) (energy required for electron pairing in a single orbital) determine the formation of low spin ( \(\Delta_0>P\) ) or high spin ( \(\Delta_0<P\) ) complex. In tetrahedral coordination entity formation, the \(d\)-orbital splitting is inverted and is smaller as compared to the octahedral field splitting. The crystal field theory attributes the colour of the complex to \(d-d\) transition of the electron. The colour of the coordination compounds depends on the crystal field splitting. In the absence of ligand, crystal field splitting does not occur and hence the substance is colourless.
Choose the correct order of the ligands in their increasing crystal field splitting:

Answer the question on the basis of passage given below:
Adsorption is the phenomenon of attracting and retaining the molecules of a substance on the surface of a solid resulting into a higher concentration on the surface than in the bulk. The substance adsorbed is known as adsorbate and the substance on which adsorption takes place is called adsorbent. In physisorption adsorbate is held to the adsorbent by weak van der Waals forces and in chemisorption by strong chemical bond.In the given reaction, the catalyst used is:
\(2 H_2(g)+O_2(g) \longrightarrow 2 H_2 O(l)\)

Alkyl halides react with sodium to give alkanes with double number of carbon atoms in

Match List I with List II

LIST I	LIST II
A. Curd	I. Streptococcus
B. Butyric acid	II. Propionibacterium sharmanii
C. Swiss cheese	III. Clostridium butylicum
D. Clot buster	IV. Lactobacillus

Choose the correct answer from the options given below:

Choose the correct IUPAC name of the following compound: