The Chemistry (School & UG) category covers the fundamental to advanced concepts of Chemistry, structured to support Class 11–12 students, competitive exam aspirants, and undergraduate learners. The content emphasizes conceptual clarity, problem-solving skills, and strong alignment with NCERT and university syllabi.
In this category, you will study:
Physical Chemistry – atomic structure, thermodynamics, chemical kinetics, equilibrium, electrochemistry, and solutions
Inorganic Chemistry – periodic trends, chemical bonding, coordination compounds, metallurgy, and s-, p-, d-, and f-block elements
Numerical problem-solving – formula-based calculations, mole concept, and graph-based questions
Reaction mechanisms and derivations with step-by-step explanations
Comparisons, trends, and exceptions important for exams
NCERT-based theory, supported by diagrams, tables, MCQs, assertion–reason questions, numericals, and PYQs
The content is designed to build strong foundations, improve analytical and quantitative skills, and prepare students for school examinations, competitive exams, and undergraduate assessments.
Develop a clear, logical, and application-oriented understanding of Chemistry to excel academically and confidently tackle problem-based and conceptual questions at both school and UG levels.
Q. What happens to the equilibrium position of a reaction when the concentration of a reactant is increased?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
The equilibrium remains unchanged
D.
The reaction stops
Solution
According to Le Chatelier's Principle, increasing the concentration of a reactant will shift the equilibrium position to the right to favor the formation of products.
Correct Answer:
A
— The equilibrium shifts to the right
Q. What happens to the equilibrium position when the concentration of a reactant is increased in a reversible reaction?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
The equilibrium remains unchanged
D.
The reaction stops
Solution
According to Le Chatelier's Principle, increasing the concentration of a reactant will shift the equilibrium position to the right to favor the formation of products.
Correct Answer:
A
— The equilibrium shifts to the right
Q. What happens to the equilibrium position when the concentration of a reactant is increased in a system at equilibrium?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
No change occurs
D.
The reaction rate increases
Solution
According to Le Chatelier's Principle, increasing the concentration of a reactant will shift the equilibrium position to the right to favor the formation of products.
Correct Answer:
A
— The equilibrium shifts to the right
Q. What happens to the equilibrium position when the concentration of a reactant is increased?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
No change occurs
D.
The reaction stops
Solution
According to Le Chatelier's Principle, increasing the concentration of a reactant will shift the equilibrium position to the right to favor the formation of products.
Correct Answer:
A
— The equilibrium shifts to the right
Q. What happens to the position of equilibrium when the concentration of a reactant is increased?
A.
The equilibrium shifts to the right
B.
The equilibrium shifts to the left
C.
No change occurs
D.
The reaction stops
Solution
According to Le Chatelier's Principle, increasing the concentration of a reactant will shift the equilibrium position to the right to favor the formation of products.
Correct Answer:
A
— The equilibrium shifts to the right
A.
Titration of a solution with a known concentration
B.
Titration where the endpoint is determined by color change
C.
Titration of an excess reagent followed by titration of the excess
D.
Titration that uses a solid reagent
Solution
A back titration involves adding an excess of a reagent to react with the analyte, then titrating the excess reagent to determine the amount that reacted.
Correct Answer:
C
— Titration of an excess reagent followed by titration of the excess
Q. What is a common mistake when performing a titration?
A.
Not swirling the flask
B.
Using too much titrant
C.
Not recording the initial volume
D.
All of the above
Solution
Common mistakes in titration include not swirling the flask to ensure proper mixing, using too much titrant, and failing to record the initial volume accurately.
