List of top Chemistry Questions

The unit of rate constant of a second order reaction is
Milk is
If the rate equation for a reaction is \( \frac{dx}{dt} = k[H]^{1/2}[B]^{1/2} \), the order of the reaction is
According to Freundlich adsorption isotherm
Which of the following is a lyophilic colloid?
Which of the following catalysts is used in the manufacture of ammonia by Haber’s process?
With which of the following does acetic acid not form acyl chloride?
Which of the following is not a first order reaction?

According to Fajan's rules, which of the following is not correct about covalent character?

Acetaldehyde is more reactive than acetone towards addition of HCN.
Assertion (A): When NaCl is added to water, a depression in freezing point is observed.
Reason (R): NaCl undergoes dissociation in water.
Write the chemical reaction involved in Gabriel phthalimide synthesis.
What are interhalogen compounds? Write the chemical reaction when chlorine reacts with dry slaked lime.
The increasing order of molarity of 25 gm each of:
(A) \( \text{NaOH} \)
(B) \( \text{LiOH} \) 
(C) \( \text{KOH} \) 
(D) \( \text{Al(OH)}_3 \) 
(E) \( \text{B(OH)}_3 \)
in the same volume of water is:
Choose the correct answer from the options given below:
A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is:
(Given atomic masses of A=64; B=40; C=32 u)
Define molecularity of the reaction. State any one condition in which a bimolecular reaction may be kinetically first order.
For the reaction 2A⇋ B + C, KC = 4 × 10–3 . At a given time, the composition of reaction mixture is: [A] = [B] = [C] = 2 × 10–3 M. Then, which of the following is correct?
The chemical name of calgon is:
Which of the following is not isoelectronic?
A solution is prepared by dissolving 5 g of a non-volatile solute in 200 g of water. It has a vapor pressure of 31.84 mm Hg at 300 K. Calculate the molar mass of the solute.
(Vapor pressure of pure water at 300 K = 32 mm Hg)
Arrange the following elements in increasing order of electronegativity:
N, O, F, C, Si
Choose the correct answer from the options given below:
Write the stepwise mechanism of nucleophilic addition reactions in the carbonyl compounds.
1028 grams of seawater sample contains 7 mL of dissolved oxygen ($ \text{O}_2 $). What is the concentration of oxygen in parts per million (ppm)?
Match List-I with List-II :  
List - IMoleculeList - IIBond enthalpy (kJ mol-1)
(A) HCl(I) 435.8
(B) N2(II) 498
(C) H2(III) 946.0
(D) O2 (IV) 431.0
Identify the correct answer from the options given below :
Match List I with List II.
List I
(Molecule)		List II
(Number and types of bond/s between two carbon atoms)
A.ethaneI.one σ-bond and two π-bonds
B.etheneII.two π-bonds
C.carbon molecule, C2III.one σ-bonds
D.ethyneIV.one σ-bond and one π-bond
Choose the correct answer from the options given below: