List of top Chemistry Questions

The structure given below represents:

The major product (X) formed in the given reaction is an example of:

An alcohol X (\( C_4H_{10}O \)) reacts with conc. HCl at room temperature to give Y (\( C_4H_9Cl \)). Reaction of X with Cu at 573 K gave Z. What is Z?
A carbonyl compound X (\( C_3H_6O \)) on oxidation gave a carboxylic acid Y (\( C_3H_6O_2 \)). Oxime of X is:
In neutral medium potassium permanganate oxidizes \( I^- \) to \( X \). Identify \( X \).
The disproportionation products of ortho phosphorous acid are:
The \(\Delta T_b\) value for 0.01 m KCl solution is 0.01 K. What is the Van’t Hoff factor? (Kb for water = 0.52 K kg mol\(^{-1}\))
Some substances are given below Ag: CO\(_2\) (s); SiO\(_2\) (s); ZnS (s) SO\(_2\) (s); A/N: HCl (s); H\(_2\)O (s) The number of molecular solids and network solids in the above list is respectively.
Tropolone is an example for which of the following class of compounds?
Two statements are given below: I. In dry cleaning, the solvent \(Cl_2C\) = \(CCl_2\) was earlier used and now it is replaced by liquefied \(CO_2\).
II. In bleaching of paper, \(H_2O_2\) was used earlier and now it is replaced by chlorine gas.
The correct order of decomposition temperature of \(MgCO_3\) (X), \(BaCO_3\) (Y), \(CaCO_3\) (Z) is:
Which one of the following is used as piezoelectric material?
What is the conjugate base of chloric acid?
A golf ball of mass ‘m’ has a speed of 50 m/s. If the speed can be measured within accuracy of 2\%, the uncertainty in the position is
Which one of the following sets is not correctly matched?
The validity of Freundlich isotherm can be verified by plotting:
Arrange the following pesticides in the chronological order of their release into the market: A: Organophosphates
B: Organochlorides
C: Sodium chlorate
Aluminium carbide on reaction with \( D_2O \) gives \( Al(OD)_3 \) and ‘X’. What is ‘X’?
The correct formula used to determine the formal charge (\( Q_f \)) on an atom in the given Lewis structure of a molecule or ion is (V = number of valence electrons in free atom, U = number of unshared electrons on the atom, B = number of bonds around the atom)
Identify the incorrect statements from the following: I. \( \Delta S_{\text{system}} = (\Delta S_{\text{total}} + \Delta S_{\text{sur}}) \) II. \( A(l) \rightarrow A(s) \); for this process entropy change decreases III. Entropy units are \( J \ K^{-1} \ mol^{-1} \)
Among the following, the molecule in which all atoms obey the octet rule is
What is the correct equation that relates kinetic energy (\(E_{\text{ke}}\)) and pressure (\(P\)) of one mole of an ideal gas? - (V = Volume)

At T(K), the following graph is obtained for an ideal gas.

Which of the following graphs correctly represents the work done on the gas (shaded part)?

Identify the correct statements from the following: I. Conjugate base of chloric acid is \( ClO^- \)
II. \( AlCl_3 \) is a Lewis acid
III. Conjugate base of \( NH_3 \) is \( NH_2^- \)
The anions present in baking soda, caustic soda, and washing soda respectively are