List of top Chemistry Questions

Freundlich adsorption isotherm: log(mx) vs log(p) increases then flattens (points C-D). Experimental condition represented by C-D?
The incorrect statement about the oxidation states of group 14 elements is
What is the product 'Z' in the following reaction sequence?
\(E^\circ_{M^{2+}/M}\) (in V) is highest for
Match the following
The correct answer is
The value of van't Hoff factor, i, for CH₃COOH solution in water will be
What is the pH of a 0.1 M NaOH solution?
Which of the following gases is produced when zinc reacts with dilute hydrochloric acid?
In the reaction \( 2 \, \text{H}_2 + \text{O}_2 \to 2 \, \text{H}_2\text{O} \), if 4 moles of hydrogen react completely with oxygen, how many moles of water will be produced?
Given below are two statements: Statement (I):
isomeric compounds
are isomeric compounds.
Statement (II):
isomeric compounds
are functional group isomers.
In the light of the above statements, choose the correct answer from the options given below:
The IUPAC name of the coordination compound is: \[ [\text{Rh}(CO)_2I_2]^- \]
In drinking water, if the maximum prescribed concentration of copper is x mg dm⁻³, the maximum prescribed concentration of zinc will be
The empirical formula of the compound 'D' formed in the given reaction sequence is
C₂H₄ \(\xrightarrow{Br_2|CCl_4}\) A \(\xrightarrow{(i) alc. KOH (ii) NaNH_2}\) B \(\xrightarrow{cyclic\;polymerization}\) C \(\xrightarrow{Cl_2(excess), dry\;AlCl_3, dark, cold}\) D
Which of the following is used as stabilizer for H$_2$O$_2$?
Identify the number of metalloids from the following: Sb, Be, P, Ge, Te, S, Cs, Tc, I
IUPAC name of [Co(NH$_3$)$_4$(H$_2$O)Cl]Cl$_2$ is:
In Hydrogen atom, an electron jumped from an orbit of radius 2592.1 pm to another orbit of radius 211.6 pm. What is the energy difference (in J) between these two states?
The rate of a reaction doubles when the temperature is raised by 10°C. Which of the following options represents the value of activation energy \( E_a \) for this reaction?
In long form of periodic table an element 'X' is present in group 'Y' in which Mn is also an element. X, Y respectively are
Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite
Observe the elements from H(Z=1) to Ca(Z=20). The number of elements with 1, 2 and 3 unpaired electrons in their ground state is respectively
An amine X (C4H11N) on heating with CHCl3 in ethanolic KOH forms a foul-smelling substance. Product of other amine Y (C4H11N) and benzenesulphonyl chloride is insoluble in alkali. What are X and Y respectively?
On prolonged heating with HI, glucose gives a compound 'C', which can be obtained by Wurtz reaction using sodium metal and compound 'D'. Identify 'D'
Which of the following statement is not correct?
Which of the following statements are correct?
I. The increasing order of covalent character of NaCl, RbCl, MgCl$_2$ is RbCl < NaCl <\ MgCl$_2$
II. The high boiling point of water is due to intramolecular hydrogen bonding
III. H$_2$O has more dipole moment among NH$_3$, H$_2$O, and HF