List of top Chemistry Questions

The uncertainty in the position of electron ($\Delta x$) is approximately 100 pm. The uncertainty in momentum (in kg m s$^{-1}$) of an electron is [h = 6.626 $\times 10^{-34}$ Js]
Which of the following orders is not correct about the property shown against it?
What are x and y in the following set of reactions?
Which of the following is not an example of an antacid?
When ethyl bromide and \textit{n}-propyl bromide are allowed to react with Na metal in dry ether, the number of different alkanes formed is:
Consider the following sequence of reactions:
isopropyl benzene
The incorrect statement about compound \( z \) is:
Observe the following reactions:
The order of reactivity of x, y, z towards SN1 reaction
The order of reactivity of x, y, z towards S\textsubscript{N}1 reaction is:
What are x and y in the following reaction sequence?
x and y in the following reaction sequence?
Arrange the products I, II, III from the following reactions in decreasing order of their acid strength.
Arrange the products I, II, III
The improper functioning of 'X' results in Addison's disease. Hormone 'Y' is responsible for the development of secondary female characteristics. 'X' and 'Y' are respectively:
In which polymer preparation, Ziegler–Natta catalyst is used?
Which of the following complexes exhibit geometrical isomerism?
[label=\Roman*.]
Gas X is obtained in Deacon's process. X on reacting with iodine and water gives:
The alloy that contains copper and Zn is $x$ and the one that contains copper and Ni is $y$. What are $x$ and $y$ respectively?
The incorrect statement about amylose is:
Kaolinite, a form of clay is the ore of metal X and malachite is the ore of metal Y. X and Y respectively are:
248 g of ethylene glycol (C\(_2\)H\(_6\)O\(_2\)) is added to 200 g of water to prepare antifreeze. What is the molality of the resultant solution?
A solution containing 7.5 g of urea (molar mass = 60 g/mol) in 1 kg of water freezes at the same temperature as another solution containing 15 g of solute X in the same amount of water. The molar mass of X (g/mol) is
Gold crystallizes in fcc lattice. The edge length of the unit cell is 4 Å. The closest distance between gold atoms is 'x' Å and density of gold is 'y' g/cm\(^3\). What are x and y respectively?
What is the \(E_{cell}\) (in V) of the following cell at 298 K?
\[ Zn(s) | Zn^{2+} (0.01 M) || Ni^{2+} (0.1 M) | Ni(s) \] Given \(E^\circ_{Zn^{2+}/Zn} = -0.76 V\), \(E^\circ_{Ni^{2+}/Ni} = -0.25 V\), \(\frac{2.303 RT}{F} = 0.06 V\)
The IUPAC name of the following compound is
7-Bromo-5-ethyl-2-methyldec-5-en-4-ol
Identify the correct statements from the following (only one):
I) Sulphur sol is an example of multimolecular colloid.
II) Starch sol is an example of associated colloid.
III) Artificial rubber is an example of macromolecular colloid.
Consider the following statements:
Statement-I: The order of electronegativity of B, Al, In, Tl is \(B>Tl>Al>In\)
Statement-II: Boric acid is a weak protic acid
The following equilibrium is established at STP:
\[ B_2 (g) \rightleftharpoons 2B(g) \] Atoms of B occupy 20% of total volume at STP. The total pressure of the system is 1 bar. What is its \(K_p\)? (STP volume = 22.7 L)
Which of the following does not exist?