What is the mass percentage of NaCl in the solution if 1.75g of NaCl is dissolved in 5.85g of water.

Enthalpy of atomisation of transition elements can be arranged in increasing order as:
A. \(V\)
B. \(Cr\)
C. \(Mn\)
D. \(Fe\)
E. \(Co\)
Choose the correct answer from the options given below:

Select the correct statement.

What is the oxidation number of the metal of \([Co(H_2O)(CN)(ox)_2]^{2-}\) coordination entity?

Werner was the first to describe the bonding features in coordination compounds. But his theory could not answer basic questions like :
(i) Why only certain elements possess the remarkable property of forming coordination compounds ?
(ii) Why the bonds in coordination compounds have directional properties ?
(iii) Why coordination compounds have characteristics magnetic and optical properties ?Many approaches have been put forth to explain the nature of bonding in coordination compounds viz. Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT) and Molecular Orbital Theory (MOT).
We shall focus our attention on elementary treatment of the application of VBT and CFT to coordination compounds.
According to this theory, the metal atom or ion under the influence of ligands can use its ( \(n -1\) )d, ns np or ns, np, nd orbitals for hybridisation to yield a set of equivalent orbitals of definite geometry such as octahedral, tetrahedral, square planar and so on.
These hybridised orbitals are allowed to overlap with ligand orbitals that can donate electron pairs for bonding.
Predict the shape of \(\left[ Ni ( CO )_4\right]\) on the basis of VBT :

Match List I with List II

LIST - I	LIST - II
A. Zone refining	I. Titanium
B. Mond's process	II. Zinc
C. Electrolytic refining	III. Nickel
D. van-Arkel method	IV. Germanium

Choose the correct answer from the options given below:

The partial vapour pressure of an electrolyte at the following concentrations,
decreases in the order
(A) 0.5 M
(B) 0.1 M
(C) 0.05 M
(D) 0.001 M
Choose the correct answer from the options given below:

A thin prism of refractive index 1.5 when placed in air deviates a light ray by a minimum angle of \( 5^{\circ} \). The angle of minimum deviation when it is immersed in oil of refractive index 1.25 is:

Area of the region bounded by \(y=3 x, x\)-axis, and \(x=-1\) is :

Which of the statements are true?
(A) The coagulation of lyophobic sols can be done by electrophoresis
(B) Principal emulsifying agent for W/O emulsions are proteins, soaps, gums etc.
(C) Alum is used for cleaning muddy water
(D) Gelatin is added to ice cream to act as emulsifier
Choose the correct answer from the options given below :

Match List-l with List-ll

List-l (Name of the gene)	List-II (Encodes)
(A) 'i'	(I) Permease
(B) 'z'	(II) Repressor
(C) 'y'	(III) Transacetylase
(D) 'a'	(IV) β- Galactosidase

Choose the correct answer from the options given below:

The electric potential at a point in an electric field is \( 8 \times 10^4 \text{ V} \). The work done to bring a point charge \( 5 \times 10^{-9} \text{ C} \) from infinity to this point is:

Answer the questions from the figure given below:

'Taq' in Taq polymerase stands for: