Which of the following will not form propionaldehyde?

The intermediate compound \(\text{[A]}\) is :

The molality of solution obtained by dissolving 1.5 g of ethanoic acid \(CH _3 COOH\) in \(2 5 ~ g\) of benzene is :

Deficiency of which vitamin is responsible for osteomalacia?

Name a transition element which does not exhibit variable oxidation states

Isopropylbromide reacts with silver nitrite to form major product as

p-block elements are placed in groups 13 to 18 of the periodic table. Group 15 is nitrogen family. Nitrogen makes various compounds like \(NH _3, HNO _3, N_2 O , NO _2\) etc. Phosphorus exists in the form of white and red phosphorus. White phosphorus glows in dark. \(PH _3\) gas is used as smoke screen. Group 16 is called oxygen family. Dry air contains \(21\% O _2\) gas by volume. Combined sulphur exists as sulphates such as gypsum, epsome salt, baryte etc. The allotropic forms of sulphur are Rhombic and monoclinic sulphur. \(S_2\) is paramagnetic like \(O_2\) and it stable at high temperature.
Group 17 is Halogen family. \(F_2\) is highly reactive, \(Cl _2\) is greenish yellow gas. Both \(SO _2\) and \(Cl _2\) are used for bleaching. Group 18 is Noble gas family but some noble gases also form compounds.
Complete hydrolysis of \(XeF _6\) gives HF and \(XeO _3\) as main products.
Match List - I with List - II.

List - I	List - II
(A) Ammonia	(I) Rotten fish small
(B) Nitric Acid	(II) Detection of metal ions
(C) Phosphene	(III) Chemiluminescence
(D) White Phosphorus	(IV) Ostwald Process

Choose the correct answer from the options given below :

\(\int e^x\left(\tan ^{-1} x+\frac{1}{1+x^2}\right) d x\) is equal to :

A sample of radioactive nuclei has a half life of 5.5 years. The fraction of sample remaining undecayed after 22 years is

If matrix A is of order 2 × 3 and B of order 3 × 2 then

In Young's double slit experiment, the width of the fringes obtained with light of wavelength 6000 \( \text{\AA} \) is 3.0 mm. If the entire apparatus is immersed in a liquid medium of refractive index 1.50, then the fringe width would be

The degree of dissociation ( \(\alpha\) ) of a weak electrolyte \(A_x B_y\) is related to the van't Hoff factor (i) by the expression:

Which of the following compounds will show highest acidic strength?