Which of the following shows the tendency to form peroxide?

Which of the following reactions corresponds to the definition of enthalpy of formation ?

The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behaviour is a characteristic of substance forming.

In which reaction, there is change in oxidation number of N

Among alkaline earth metals, __________ has the tendency to form peroxides.

An atom X belongs to 4^th period of the periodic table and has highest number of unpaired electrons in comparison to the other elements of the period. The atomic number of X is

In O₂^-, O₂⁰, O₂^2- molecular species, the total number of antibonding electrons respectively are :

Aluminothermy used for on the spot welding of large iron structure is based on the fact that —

Silver bromide when dissolve in hypo solution gives complex __________ in which oxidation state of silver is __________

Which of the following can be termed as a mixed complex?

Potassium permanganate acts as an oxidant in neutral, alkaline as well as acidic media. The final products obtained from it in the three conditions are, respectively

The number of π electrons present in 6.4 g of calcium carbide is —
(N_A = Avagadro’s number)

The rate of S_N1 reaction is fastest in the hydrolysis of which of the following halides ?

To detect iodine in presence of bromine, the sodium extract is treated with NaNO₂ + glacial acetic acid + CCl₄. Iodine is detected by the appearance of

An element (atomic mass =100g/mol) having bcc structure has unit cell edge 400pm. The density (in g/cm³) of the element is

An organic compound A (C₄H₁₀O) has two enantiomeric forms and on dehydration it gives B(major product) and C(minor product). B and C are treated with HBr/ Peroxide and the compounds so produced were subjected to alkaline hydrolysis then-

Concentration of NH₄Cl and NH₄OH in a buffer solution is in the ratio of 1 : 1, K_b for NH₄OH is 10^–10. The pH of the buffer is

An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound is:

Phospholipids are esters of glycerol with