CBSE Class 11 Chemistry Question Paper Set 21 Solved

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Official CBSE Exam Papers for Class 11 Chemistry

Explore authentic exam materials through the CBSE Class 11 Chemistry Question Paper Set 21 Solved. Tailored for Class 11 learners, utilizing these Chemistry previous year papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

Solved Previous Year Papers for Chemistry

Access the complete question paper PDF for Class 11 Chemistry below. Regular practice with these targeted exam papers builds familiarity with standard question patterns and helps secure higher marks in final evaluations.

1 Write the IUPAC name and symbol of the element with atomic number 104.
 
2 Draw Lewis dot structure for CCl4. 
 
3 Give two instances of green chemistry in everyday life. 
 
4 Draw the boundary surface following orbitals a) 2pz b) 3dxy 
 
5 Why do atomic masses of most elements in atomic mass unit involve fractions? 
 
6 a) Define mole fraction
b) How is vapour density of a gas related to its molecular mass?
 
7 Calculate the frequency and wave number of a radiation having wavelength 600nm. 
 
8 What are isoelectronic species? Name one anion and one cation isoelectronic with argon [Ar].
 
9 Differentiate between photochemical and classical smog[2points]

OR
 
What do you understand by greenhouse effect? Name any two gases responsible for green house effect.
 
10 Write the general outer electronic configuration of d-block elements. Also mention any two properties of these elements.
 
11 Name the chemical responsible for ozone depletion. Give any two harmful effects of ozone depletion.
 
12 Define lattice enthalpy. Use Lewis symbol to show the electron transfer between calcium and oxygen to form calcium oxide.
 
13 a) What is eutrophication?
b) What is acid rain? How is it harmful to the environment?
 
14 What do you understand by the term limiting reagent? 1.2g of magnesium was dropped in 100ml of 0.1M HCl solution. Identify the limiting reagent and calculate the volume of hydrogen obtained at STP. [Mg=24, H=1, Cl=35.5]
 
15 a) How is formal charge of an atom in a molecule calculated?
b) What do you understand by the term resonance? Draw resonating structures of carbonate ion.
 
16 The first & second
CBSE Class 11 Chemistry Question Paper Set N Solved 1
 
Identify the element which is likely to be
i. A most reactive non-metal
ii. A noble gas
iii. A most reactive metal
 
17 Light of wavelength 400nm strikes a certain metal which has a photoelectric work function of 2.13eV. Find out the maximum kinetic energy of the photoelectrons.
[1eV=1.6x10-19J, h=6.626x10-34Js, c=3x108]
 
OR
 
a) Calculate the de Broglie wavelength of a bullet of mass 2.2 x 10-3 Kg fired with a velocity of 300 m/s.[h=6.626x10-34Js]
b) Determine the wavenumber for the transition of an electron from n=3 to n=2 in a hydrogen atom.
 
18 Account for the following
a) Anions are larger in size than their parent atom
b) Nitrogen has higher first ionization enthalpy than oxygen
c) Electron gain enthalpy of fluorine is less negative than chlorine
 
 

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Past Exam Papers & Solutions for Class 11 Chemistry

Class 11 Chemistry Past Exam Papers & Resources

Access structured past examination sets for Class 11 Chemistry. Solving the CBSE Class 11 Chemistry Question Paper Set 21 Solved provided above helps students understand actual exam difficulty levels, question formats, and topic distributions for both descriptive and objective sections.

Importance of Solving CBSE Class 11 Chemistry Question Paper Set 21 Solved

Reviewing official papers clarifies the exact marking scheme and structural layout established by the CBSE, enabling students to structure answers for maximum score potential.

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FAQs

Where can I download the official PDF for CBSE Class 11 Chemistry Question Paper Set 21 Solved?

The CBSE Class 11 Chemistry Question Paper Set 21 Solved is available for download on StudiesToday.com. It includes complete set with all sections so that Class 11 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 11 Chemistry Question Paper Set 21 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 11 Chemistry Question Paper Set 21 Solved are prepared by subject matter experts as per official marking scheme. Class 11 students will understand the structure of answers and 'step-marks' methodology Chemistry.

How does solving CBSE Class 11 Chemistry Question Paper Set 21 Solved help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 11 Chemistry Question Paper Set 21 Solved is important to understand repeat themes and question difficulty levels of Chemistry. It helps Class 11 students to test their time management skills too.

Can I access CBSE Class 11 Chemistry Question Paper Set 21 Solved in different languages?

Yes, where applicable, CBSE Class 11 Chemistry Question Paper Set 21 Solved is available in both English and Hindi mediums. All students from Class 11 can access Chemistry study material in their preferred language.

Is there a charge to download the CBSE Class 11 Chemistry solved papers?

No, all previous year question papers on StudiesToday, including CBSE Class 11 Chemistry Question Paper Set 21 Solved, are provided free of charge in mobile-friendly PDF.