List of top Chemistry Questions

The hybridization and number of lone pair of electrons on central atom of SF$_4$ respectively are
Given below are two statements
Assertion (A): Ionic compounds are formed by non-directional bonds
Reasoning (R): They are soluble in nonpolar solvents
The correct answer is
Match the following
hybridisation
The hybridization of central atom of ClF$_3$, NH$_3$, SO$_3$ are respectively
Observe the following species: AlCl$_3$, NH$_3$, H$^+$, Co$^{3+}$, $^-$OH, Mg$^{2+}$, BF$_3$, Cl$^-$ How many Lewis acids are present in the above list?
Arrange the hydrides NH$_3$, HF, H$_2$O, HCl in the increasing order of their boiling points
The correct order of C − O bond length in CO, CO2−3, CO2 is
The P − P bond angle in P4 and S − S bond angle in cyclo S8 molecule are respectively
Which of the following are not in accordance with the property mentioned against them? I. \( F_2>Cl_2>Br_2>I_2 \): Oxidising power
II.\( MI>MBr>MCl>MF\): Ionic character of metal halide
III. \( F_2<Cl_2<Br_2<I_2 \): Bond dissociation enthalpy
IV. \( HI<HBr<HCl<HF \): Hydrogen-halogen bond strength
The number of bond pairs of electrons and total number of lone pairs of electrons in XeOF$_4$ are respectively
In which of the following, the molecules are arranged in the increasing order of their bond angles?
If the bond order in \( C_2 \) is \( x \), then the bond order in \( B_2 \) and \( O_2 \), respectively are:
One mole \(\text{H}_2\text{O}(g)\) and one mole \(\text{CO}(g)\) are taken in a 1L flask and heated to 725K. At equilibrium, 40% (by mass) of water reacted with \(\text{CO}(g)\) as follows: \[ \text{H}_2\text{O}(g) + \text{CO}(g) \rightleftharpoons \text{H}_2(g) + \text{CO}_2(g) \] Its \(K_c\) value is:
Among the following the correct statements are
I. Germanium exists only in traces
II. PbF4 molecule is tetrahedral in shape
III. GeX2 is more stable than GeX4

Match the following molecules with their dipole moments:

List IList II
\( \mathrm{H_2O} \)I. 0
\( \mathrm{BF_3} \)II. 0.23
\( \mathrm{NH_3} \)III. 1.47
\( \mathrm{NF_3} \)IV. 1.85
Which of the following is the correct order of increasing number of lone pair of electrons on the ntral atom?

Which of the following statements are correct?
LiF is less soluble in water
NaCl is less ionic than CsCl
Formation of alkali metal halide is an endothermic reaction

In D-glucose and D-fructose, which OH participates in hemiatal/hemiketal formation?
In OF\(_2\), the number of bond pairs and lone pairs of electrons are respectively:
Which one of the following molecular hydrides acts as a Lewis acid?
The conductivity of a weak acid HA of concentration 0.001 mol L\(^{-1}\) is \( 2.0 \times 10^{-5} \, \text{S cm}^{-1} \). If \( \Lambda_m^\circ ({HA}) = 190 \, \text{S cm}^2 \text{mol}^{-1} \), the ionization constant (\( K_a \)) of HA is equal to _______ \( \times 10^{-6} \).
Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The surface tension of a liquid is the combined strength of the polar of dispersion forces that are pulling on the molecules in the surface of the liquid.
Reason R: The addition of small quantities ion of impurities will alter the surface tension.
In the light of the above statements, choose the most appropriate answer from the options given below:
The number of S-S bonds and the number of lone pairs in S8 molecule,respectively,are:
' $A$' and ' $B$ ' formed in the following set of reactions are:
A' and ' B ' formed in the following set of reactions are:

The ratio of lone pair of electrons to bond pair of electrons in ozone molecule is: