List of top Chemistry Questions

The element with highest electronegativity after fluorine is:
The correct order of acidic nature of the following alkynes is:
I. \( \text{C}_2\text{H}_2 \)
II. \( (\text{CH}_3)_2\text{C}_2 \)
III. \( (\text{CH}_3)\text{C}_2\text{H} \)
Metal ‘M’ in the following reaction is: \[ 2 \text{MNO}_3 \rightarrow \text{M}_2\text{O} + 2\text{NO}_2 + \frac{1}{2}\text{O}_2 \]
The anions (A) of \( \text{C}_p\text{A}_q \) molecule form an fcc lattice. Cations (C) are positioned at the body center and half of the edge centers. The formula of the molecule is:
The correct statements with respect to halides of group 14 elements are:
(I) Both CCl4 and SiCl4 undergo hydrolysis.
(II) GeX4 is more stable than GeX2.
(III) PbX4 is less stable than PbX2.
(IV) Stability of dihalides decreases down the group.
Elements A and B have FCC and BCC structures respectively with unit cell edge length \( a = 3 \, \text{Å} \).
The number of atoms in 210 g of A = number of atoms in 594 g of B.
If density of A is \( 7 \, \text{g/cm}^3 \), what is the density of B?
The product ‘Q’ of the following reactions is:
product ‘Q’ of the following reactions
The reaction of diborane in diethyl ether with X gives metal borohydride. X is a:
Which of the following is not a disproportionation reaction?
Which of the following equations are correct?
(A) U =H−PV
(B) G =H−TS
(C) U =q+W
The compound that is used in smoke screens is:
Identify the correct statements from the following:
The formula of Calgon is \( \text{Na}_6(\text{PO}_3)_6 \)
(II) Exhausted permutit is regenerated by aqueous KCl solution.
(III) Calcium stearate is soluble in water.
(IV) In ice crystals, each oxygen is surrounded by four oxygen atoms.
Which of the following reactions is not a disproportionation reaction?
The combination of which of the following gives an ionic compound with maximum covalent character?
The tetra-atomic molecules/ions with different shapes are:
Find the false statement for ideal gases:
Maximum number of electrons possible with spin quantum number \(+\frac{1}{2}\) and principal quantum number \(n = 4\) in an atom is:
The number of valence electrons present in an element with atomic number 117 is:
In which of the following, the elements Al, B, Mg, and K are correctly arranged in the increasing order of their metallic character?
What does an oxidizing agent do?
For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap to two $2 p_z$ orbitals is(are)
The correct option(s) related to adsorption processes is(are)
The electrochemical extraction of aluminum from bauxite ore involves
The treatment of galena with $HNO _3$ produces a gas that is
Considering the reaction sequence given below, the correct statement(s) is(are)
Treating P with conc. NH4OH solution followed by acidification gives Q.