List of top Chemistry Questions

What is the total no. of rare earth metals:

RNA lacks the nitrogen base of

A precipitate is formed if the ionic product is __________?

The specific conductance of 0.01 M aqueous solution of acetic acid is 1. 63 x10-2 S m^-1and the molar conductance at infinite dilution is 390.7x10^-4 S m²mol^-1.Calculate the degree of dissociation of the acetic acid solution?

Earth’s atmosphere is richest in

Identify the product of the following reaction:

Example of an ambident nucleophile is

Electrophilic halogenation of phenol does not require catalyst because

During the adsorption of gas on the surface of solid, which of the following is true?

The hybridization of nitrogen in diethyl amine is

Which of the following statement is true for aqueous solution of 0.1 M urea, 0.2 M glucose nad 0.3 M sucrose

When the valence d orbitals of the central metal ion in tetrahedral complex are split in energy levels in CFT, which orbitals are raised to higher energy?

How many enolizable hydrogens are there in the compound 2-methylcyclohex-2- en -1 -one?

Following reaction can produce three products. The order of their amount is

A weak acid with pKa 5.9 and weak base with pKb 5.8 are mixed in equal proportions. pH of the resulting solution is

The conductivity of centimolar solution of KCI at 25°C is 0.0210 ohm^-1cm^-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is :

The density of $3 M$ solution of $NaCl$ is $10 \,g \,mL -1$. Molality of the solution is _______ $\times 10^{-2} m$ (Nearest integer). Given: Molar mass of Na and $Cl$ is $23$ and $355 \,g \,mol ^{-1}$ respectively.

A sample of water is found to contain 5.85% $(\frac{w}{w})$ of AB (molecular mass 58.5) and 9.50% $(\frac{w}{w})$ XY₂ (molecular mass 95). Assuming 80% ionisation of AB and 60% ionisation of XY₂ , the freezing point of water sample is
[Given : K_f for water 1.86 K kg mol^-1 , Freezing point of pure water is 273 K and A, B and Y are monovalent ions]

What is the splitting pattern of proton $H^{a}$ of the following compound in its $^1H NMR$ spectrum?

The number of S-S bonds and the number of lone pairs in S₈molecule,respectively,are:

The minimum number of quantum numbers required to specify an orbital in an atom is

Consider the following two statements:
Statement I: Among Mg, Al, Mg$^2$, Al$^3$, the one having smallest size is Al$^3$
Statement II: Eu is having exceptionally high atomic radii among lanthanide elements The correct answer is:

Identify the pair of elements with the highest and lowest electronegativity respectively

If the bond order in $ C_2 $ is $ x $, then the bond order in $ B_2 $ and $ O_2 $, respectively are:

Which one is an example of heterogenous catalysis?