11th Standard CBSE Syllabus & Materials
11th Standard CBSE
CBSE 11th Economics PART-A - Presentation of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Organisation of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Collection of Data - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Economics PART-A - Introduction to Economics and Statistics - New Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies International Trade Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies Evolution and Fundamentals of Business Sample Question Papers Study Material - QB365 Set A
Published on: 26/05/2021
QB365 Provides the updated NCERT Exemplar Questions for Class
11, and also provide the detail solution for each and every NCERT
Exemplar questions. NCERT Exemplar questions are latest updated
question pattern from NCERT, QB365 will helps to get more marks in Exams
Download CBSE Class 11th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Chemistry
Questions + Answers key
Take MCQ Chemistry Test
1.
Enthalpy of combustion of carbon to CO2 is –393.5 kJ mol–1. Calculate the heat released upon formation of 35.2 g of CO2 from carbon and dioxygen gas.
2.
One mole of acetone requires less heat to vaporise than 1 mole of water. Which of the two liquids has higher enthalpy of vaporisation?
3.
Arranges, p and d- subshells of a shell in the increasing order of effective nuclear charge (Zeff) experienced by the electron present in the nucleus.
4.
What will be the mass of one 12C atom in g?
5.
Volume of a solution changes with change in temparature, then will the molality of the solution be affected by temparature? Give reason for your answer.
6.
What are the sources of dissolved oxygen in water?
7.
Why is hydrogen peroxide stored in wax lined bottles?
8.
What will be the molar volume of nitrogen and argon at 273.15k and 1 atm?
9.
What would the SI unit for the quantity pV2T2/n?
10.
Name two intermolecular force that exists between HF molecules in a liquid state.
1.
The reaction for the combustion of carbon into CO2 is
C(s) + O2(g) ⟶ CO2(g); △H = -393.5 KJ mol-1
Heat released in the formation of 44 g CO2 = 393.5 KJ
∴∴ Heat released in the formation of 35.2 g CO2
\(=\frac{393 KJ × 35.2 g}{44 g} \)= 314.8 KJ
2.
Less the heat required to vaporise 1 mole of a liquid, less is its enthalpy of vaporisation. Hence, water has higher enthalpy of vaporisation.
3.
S- orbital is spherical in shape, it shields the electrons from the nucleus more effectively than p-orbital which in turn shields more effectively than d-orbital. Therefore, the effective nuclear charge (Zeff) experienced by electrons present in them is d.
4.
1 mole of carbon atoms = 6.023 × 1023 atoms of carbon
Mass of 1 atom of 12C =Atomic mass of C/Avogadro′s number
\(= \frac{ 12}{6.022×10^{23}} g\)
= 1.9927 ×10-23 g
5.
No, molality of solution does not change with temperature since mass remains unaffected with temperature.
6.
( )
Sources of dissolved oxygen in water are:
(i) photosynthesis
(ii) natural aeration and
(iii) mechanical aeration.
7.
( )
Hydrogen peroxide is decomposed by rough surfaces of glass, alkali oxides present in it and light to form
\({ H }_{ 2 }O \ and \ { O }_{ 2 } \ { 2H }_{ 2 }{ O }_{ 2 }\rightarrow { 2H }_{ 2 }O+{ O }_{ 2 }\)
To prevent this decomposition, \({ H }_{ 2 }{ O }_{ 2 }\)is usually stored in coloured paraffin wax coated plastic or teflon bottles.
8.
( )
Every gas has 22.4 L molar volume at 273.15K 1 atm pressure(STP).
9.
( )
\(\frac { p{ V }^{ 2 }{ T }^{ 2 } }{ n } \frac { { Nm }^{ -2 }({ { m }^{ 3 }) }^{ { 2 } }{ k }^{ 2 } }{ mol } ={ Nm }^{ 4 }{ k }^{ 2 }{ mol }^{ -1 } \)
10.
( )
HF molecules are polar covalent molecules.In a liquid state, there are dipole-dipole interactions and H-bonding.
11th Standard CBSE Syllabus & Materials
11th Standard CBSE
CBSE 11th Business Studies Forms of Business Organisation Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Business Studies Business, Trade and Commerce Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Physics Waves Sample Question Papers Study Material - QB365 Set A
NEW11th Standard CBSE
CBSE 11th Physics Kinetic Theory Sample Question Papers Study Material - QB365 Set A
NCERT Books
Syllabus
Exam Pattern
Sample Question Papers
Previous year Question Papers
Important Notes
MCQ Practice test
NCERT Exemplers
Case study Questions
Image Based Questions
Passage based Questions
HOT Questions
Value Based Questions
Model Questions Papers
NCERT ( Book Back ) Questions
Assertion and Reason
Important Questions And Answers
CBSE 11th Standard CBSE Subjects
CBSE Standards
