List of top Chemistry Questions

The highest occupied molecular orbital for \(Ne_2\) is
एक अम्लीय माध्यम में, \(0.25M\) ऑक्सैलिक अम्ल के \(10mL\) का \(KMnO_4\) विलयन के साथ अनुमापन किया जाता है। यदि अंत बिंदु तक पहुँचने के लिए आवश्यक \(KMnO_4\) विलयन का आयतन \(10mL\) है, तो \(KMnO_4\) विलयन की सांद्रता है :
What volume of \(O_{2(g)}\) is produced when \(2F\) current is passed through a very dilute aqueous solution of \(H_2SO_4\) at STP?
Which of the following answers positively in carbylamine test?
Clemmensen reduction involves the formation of an alkane from a ketone on treatment with
Which of the following amine has the highest \(pK_b\) value in aqueous phase?
Which of the following is not an essential amino acid?
The carboxylic acid that is used in rubber, textile, dyeing, leather and electroplating industries is
Chloroethane is prepared by the action of \(PCl_3\) on ethanol. What is the inorganic product formed in the reaction?
Consider the reaction \(CH_3Cl + NaI \to CH_3I + NaCl\). The name of the reaction and the solvent used to remove \(NaCl\) from the reaction mixture are respectively
Which of the following oxidising agent is used to convert ethanol to ethanal?
List I contains organic compounds while list II contains boiling points.
List I: (i) n-Butanol, (ii) 1-Chlorobutane, (iii) n-Butane, (iv) Ethoxyethane
List II: (a) 350 K, (b) 309.1 K, (c) 307.6 K, (d) 390 K
Which of the following is correct matching?
The general combustion equation for any alkane is given by the following equation: \(C_nH_{2n+2} + X O_2 \to nCO_2 + (n+1) H_2O\). What is the value of ‘X’ in the above equation?
Which of the following complex ion absorbs yellow colour in the visible region?
Tropone is an example of
Which of the following 3d transition metal has the positive standard electrode potential (\(E^\circ\))?
The correct IUPAC name of the complex \([Ag(NH_3)_2][Ag(CN)_2]\) is named as
A binary solution containing two volatile solutes A and B shows positive deviation from Raoult’s law. Which of the following statement is true?
Consider the following equilibrium \(A(g) + B(g) \rightleftharpoons C(g) + D(g)\). The equilibrium constant will be altered when
The oxidation of ferrous oxalate by \(KMnO_4\) in acidic medium is given by the following equation, \(3MnO_4^- + 5FeC_2O_4 + 24H^+ \to 3Mn^{2+} + 5Fe^{3+} + 10CO_2 + 12H_2O\). What is the volume of \(0.01 \text{ mol dm}^{-3}\) \(KMnO_4\) required to oxidise \(15 \text{ cm}^3\) of an acidified solution of \(0.01 \text{ mol dm}^{-3}\) ferrous oxalate?
The first order reaction \(N_2O_5 \to 2NO_2 + 1/2 O_2\), is carried out in a closed container and there were no products initially. When it is heated at constant volume the final pressure of the system on 75% completion of the reaction is
In a first order reaction the initial concentration of the reactant was \(0.1 \text{ M}\) at \(298 \text{K}\). It is decreased to \(0.01 \text{ M}\) in 8 minutes and 20 seconds. Calculate the rate constant of the reaction at \(298 \text{K}\).
The molar entropy of which of the following reaction is negative?
List-I contains some group-I elements and List-II contains their electron gain enthalpy values (in kJ mol\(^{-1}\))
List-I: (i) H, (ii) Li, (iii) Na, (iv) K
List-II: (a) -48, (b) -53, (c) -73, (d) -60
Choose the correct match.
A certain amount of H$_{2(g)}$ and I$_{2(g)}$ are sealed in a 4L container and kept at 600K to attain equilibrium. K$_C$ for the reaction, H$_{2(g)}$ + I$_{2(g)} \rightleftharpoons$ 2HI\(_{(g)}\) at 600K is 64. If the equilibrium concentration of HI\(_{(g)}\) is 0.08M, what are the equilibrium concentrations of H$_{2(g)}$ and I$_{2(g)}$ at the same temperature?