Amylose is a water-soluble part of starch. What is the percentage solubility of it?

Grignard reagent should be prepared under anhydrous condition because

What is the correct Nernst equation for the following cell?
\(Zn(s)|Zn^{2+}||Ag^{+}|Ag(s)\)

In a thermite process, the reducing agent is

Presence of nitrate ions can be detected by adding freshly prepared \(\text{FeSO}_4\) solution. Then concentrated \(\text{H}_2\text{SO}_4\) is added along the walls of the test tube.
A brown ring is formed at the interface having the formula \([\text{Fe(H}_2\text{O)}_5\text{(NO)}]^{2+}\.
The oxidation state of Fe in this complex is

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 vix. 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 type of hybridisation state in \(\left[ CoF _6\right]^{3-}\)

If the solubility of the given gases in water decreases in the order of formaldehyde, methane, vinyl chloride, argon.
Match List-I with List-II.

List-I(Gas)	List-II(\((\mathrm{K})_{\mathbf{H}} / \mathrm{k}\) bar)
(A) Formaldehyde	(I) 40.3
(B) Vinyl Chloride	(II) 0.413
(C) Argon	(III) 1.83 x \(\mathrm{10}^{-5}\)
(D) Methane	(IV) 0.611

Choose the correct answer from the options given below:

A Convex lens having a power of one dioptre is made of glass having refractive index 1.48. What will be the power of convex lens made of material with refractive index 1.6 and same dimension

Corner points of the feasible region for LPP are: \((4,0),(0,5),(7,0),(5,2)\) and \((0,3)\). Let \(Z=3 x+6 y\) be the objective function. Then, the value of (Max. \(Z-\) Min. \(Z\) ) i :

The main cause of basicity of oxoacids of phosphorous is :

Microbe responsible for converting milk to curd is :

The standard reduction potential for \(Zn^{2+}/Zn\) is \(-0.76\) V and that for \(Fe^{2+}/Fe\) is \(-0.41\) V. The galvanic cell can be correctly represented by :

An \( \alpha \) particle and a proton enters a region of uniform magnetic field B with same momentum at right angle to magnetic field. The ratio of the radii of the circular paths of \( \alpha \) particle to proton is: