What is the coordination number of Fe in \(\left[ Fe ( CO )_5\right]\) and \(\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}\) respectively?

Identify the product ' \(X\) ' and ' \(Y\) ' in the following reaction.

To avoid the medical condition called 'bends' in scuba divers, the composition of gas filled in the tank is

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, \(t_2\), 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 \((3 / 5) \Delta_0\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_{\circ}\) 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 \(\Delta_0\) and pairing energy, \(P\) (energy required for electron pairing in a single orbital) determine the formation of low spin ( \(\Delta_{\circ}>P\) ) or high spin ( \(\Delta_{\circ}<P\) ) 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.
What will be the crystal field splitting energy for tetrahedral \(\left[ CoCl _4\right]^{2-}\) if its value for octahedral \(\left[ CoCl _6\right]^{4-}\) is \(18,000 cm^{-1}\) ?

The increasing order of the melting points of following transition metals is
(A) Fe
(B) Mn
(C) Cr
(D) V
Choose the correct answer from the options given below:

The specific rate constant of a first order reaction depends on the

Match List - I with List - II.

List - I (Ore)	List - II (Metal)
(A) Calamine	(1) Copper
(B) Malachite	(II) Aluminium
(C) Siderite	(III) Zinc
(D) Cryolite	(IV) Iron

Choose the correct answer from the options given below :

A current carrying solenoid of cross-sectional area \( 2 \, cm^2 \) and 2000 turns has a magnetic moment of \( 0.80 \, Am^2 \). The current flowing through the solenoid is

A light ray from air is incident on a glass slab (\( \mu = 1.5 \)) as shown in the figure. It undergoes a total internal reflection and travels along AB. The thickness AC of the glass slab is 20 cm. The time taken by light to cross the glass slab after reflection is

Curium (Cm) belongs to 5f series. Its atomic number is 96. Which of the following is the correct electronic configuration of Curium?

Question based on following passage :
Adsorption is the process of attracting and retaining the adsorbate molecules on the surface of adsorbent. It is of two types i.e. Physisrption and chemisorption. To increase the rate of reaction, the substance called 'catalyst' is added. Promotors enhance the activity of catalyst while poison decrease the catalyst activity. Solutions may be true solution, suspension and colloids. Colloids are heterogenous but quite stable. On the basis of nature of interaction, colloids may be Lyophilic or Lyophobic. On the basis of type of dispersed phase particles, there may be multimolecular colloids, macromlecular colloids and associated colloids. The congulation of colloids may be done by boiling, dialysis or by mixing oppositely charged sols.
Reason for the stability of colloidal solution is :

Two cells of emf 2 V and 4 V and internal resistance of \( 0.5 \text{ } \Omega \) each are connected with an external resistor of resistance \( 3 \text{ } \Omega \) as shown in the figure. The terminal potential difference of 2 V cell is:

What is the total number of chiral carbons present in glucopyranose and fructofuranose respectively?