List of top Chemistry Questions

From the following, identify the set that contains all meta directing groups:
Two statements are given below Statement I: The resonance structure with more number of covalent bonds is less stable. Statement II: The position of nuclei does not change in resonance structures.

 A few sols are given below:
As2S3 sol, starch sol, Al2O3 ·
xH2O sol, TiO2 sol, gold sol, congo red sol, blood, methylene blue sol, CdS sol
The number of positively charged sols in the above list is:

The iodine oxide which is used in the estimation of carbon monoxide is:
Which of the following oxoacids of phosphorus has two P-H bonds?
The metal having the highest melting point among lanthanides is
Which of the following is correct?

Match the following: 

What are the reagents A, B, and C respectively in the following reaction sequence? Reaction Sequence: 

Chemical Compounds

A: CH3CH2CHO

B: CH3COCH3

 

D: 

Two of the products formed by the reaction of \(X\) with HCl are gases. What is \(X\)? HCl with \(X\) forms gaseous products, two of which are identified.
What is the symbol used in a chemical equation to represent the gas evolved in a reaction?
Oxygen gains ____________________ electrons during the chemical changes.
The reaction of an acid with a base to give a salt and water is known as
What is formed when chlorine gas is passed through slaked lime?

The values of X, Y, and Z in the following chemical equation are respectively: 
\( S_8 + X HNO_3 ({conc.}) \rightarrow Y H_2SO_4 + X NO_2 + Z H_2O \)

For a reaction $ 5X + Y \to 3Z $, the rate of formation of Z is $ 2.4 \times 10^{-5} \, \text{mol L}^{-1} \text{s}^{-1} $. Calculate the average rate of disappearance of X.
How many grams of Albumin and Aspirin will be required to set a reaction between one millimole of Albumin and 0.5 millimole of Aspirin? Given the molecular weight of Albumin is 67,000 Da and that of Aspirin is 180 Da.
If the rate equation for a reaction is \( \frac{dx}{dt} = k[H]^{1/2}[B]^{1/2} \), the order of the reaction is
The unit of rate constant of a second order reaction is
Which of the following catalysts is used in the manufacture of ammonia by Haber’s process?
The rate of reaction of a substance depends upon

For the reaction: $A_2(g) \rightleftharpoons B_2(g)$

The equilibrium constant $K_c$ is given as 99.0. In a 1 L closed flask, two moles of $B_2(g)$ is heated to $T(K)$. What is the concentration of $B_2(g)$ (in mol L$^{-1}$) at equilibrium?

If equilibrium constant for the equation $ A_2 + B_2 \rightleftharpoons 2AB \quad \text{is} \, K_p, $ then find the equilibrium constant for the equation $ AB \rightleftharpoons \frac{1}{2} A_2 + \frac{1}{2} B_2. $

10 g of a metal (M) reacts with oxygen to form 11.6 g of oxide. What is the equivalent weight of \( M \)?