Class 11 - Chemistry - Alkanes - Questions and Answers #hydrocarbons #alkanes #organicchemistry #class11chemistry #eduvictors

Class 11 - Chemistry - Alkanes - Questions and Answers

Chapter: Hydrocarbons

Very Short Answer Based Questions (VSQA)

Q1: What are hydrocarbons?

Answer: Hydrocarbons are the compounds of carbon and hydrogen are obtained from coal and petroleum.

Q2: What are alkanes?

Answer: Alkanes are saturated open-chain hydrocarbons containing C—C single bonds.

Q3: How C-C atoms are joined in alkanes? What are the lengths of C-C and C-H bonds?

Answer:  In alkanes, C-atoms are tetrahedrally joined together in which C—C and C—H bond lengths are 154 pm and 112 pm respectively.

Chemistry - Colours Of Compounds For CBSE Class 12, 11, 10 and 9 (#class12Chemistry)(#class11Chemistry)(#ntse)(#neet)(#eduvictors)

 Chemistry - Colours Of Compounds For CBSE Class 12, 11, 10 and 9 

Salts/Compounds     Colour

1. Potassium dichromate, K₂Cr₂O₇ Orange

2. Potassium permanganate, KMnO₄ Violet

3. Ferric tetra-oxide, Fe₃O₄ Black

4. Ferrous sulphate, FeSO₄.7H₂O Green

5. Ferric sulphate, Fe₂(SO₄)₃ Yellow

6. Ferric hydroxide, Fe(OH)₂ Green

Common Chemical Compounds – Names and Formulas (General Science)(#chemistry)(#compete4exams)(#eduvictors)(#class12Chemistry)(#NEET)(#JEE)

 Common Chemical Compounds – Names and Formulas 

(General Science)

In competition exams like NEET, JEE, NTSE etc. generally, the chemical names are asked in these exams. 

The list of all the important Names and Formulas of Common Chemical Compounds is given here: weblink

 

CBSE Class 11 - Chemistry - Chapter - Structure Of Atom - Important Points To Remember (#class11Chemistry)(#NEET)

CBSE Class 11 - Chemistry - Chapter - Structure Of Atom - Important Points To Remember

Structure of Atom

1. Discovery of Electron — Discharge Tube Experiment:

In 1879, William Crooks studied the conduction of electricity through gases at low pressure. He performed the experiment in a discharge tube which is a cylindrical hard glass tube about 60 cm. in length.

Mass of electron = 9.109534 x 10⁻³¹ kg

Charge on a electron = (-) 1.602 x 10⁻¹⁹ C

 

2. Properties of Cathode Rays

(i) Cathode rays travel in straight line.

(ii) Cathode rays start from cathode and move towards the anode.

CBSE Class 10 - Chemistry - pH related Questions and Answers (Acids and Bases) (#eduvictors)(#class10Chemistry)(#class10NCERT)(#cbseClass10)

 pH related Questions and Answers

CBSE Class 10 - Chemistry 

Chapter: Acids and Bases

Q1: How is the strength of acid and base can be estimated?

Answer: Strength of acid and base can be estimated by using universal indicator.

Q2: What is a universal indicator?

Answer: Universal indicator is used to estimate the strength of an acid or a base. It is a mixture of several indicators. It shows different colours at different concentrations of H⁺ ions in the solution.

Q3: What is pH value of a solution?

Answer: The pH of a solution is inversely proportional to the concentration of hydrogen ions in it. Mathematically the pH of a solution is inversely proportional to the concentration of hydrogen ions in it. pH is a pure number, it has no units.

CBSE Class 11 - Chemistry - Chapter: Equilibrium - What are Irreversible and Reversible Reactions? (#eduvictors)(#cbse2020)(#class11Chemistry)

What are Irreversible and Reversible Reactions? 

CBSE Class 11 - Chemistry - Chapter: Equilibrium 

Q1: What is equilibrium?

Answer: It is a state in a process when two opposing processes (forward and reverse) occur simultaneously at the same rate. The free

energy change at equilibrium state is zero i.e., ΔG = 0.

Q2: What are reversible reactions? Give examples.

CBSE Class 11 - Chemistry Chapter 9 - Hydrogen - Very Short Questions Answers (VSQA) (#cbsenotes)(#eduvictors)

Class 11 - Chemistry 

Chapter 9 : Hydrogen 

Very Short Questions Answers 

Q1: Name the first element of periodic element. What is its electronic configuration?

Answer: Hydrogen is the first element in the periodic table and also the lightest element known. Electronic configuration of Hydrogen is 1s¹.


Q2: Name the three isotopes of hydrogen.

Answer:
(i) Protium (¹H₁)
(ii) Deuterium ( ¹H₂ or ¹D₂)
(iii) Tritium ( ¹H₃ or ¹T₃)


Q3: Which isotope of hydrogen is radioactive?

Answer: Tritium


Q4: How is dihydrogen prepared commercially?

Answer: By electrolysis of acidified water.


Q5: What is the importance of heavy water with regard to nuclear power generation?

CBSE Class 11 - Chemistry Sample Question Paper - (2018-19) (#cbsepapers)(#eduvictors)

CBSE Class 11 - Chemistry 
 Sample Question Paper - (2018-19)

Chemistry is that branch of science which deals with the composition, structure and properties of matter. Class 11 Chemistry syllabus broadly covers fundamental concepts of Chemistry. The syllabus provides logical sequencing of the ‘Units’ of the subject matter with proper placement of concepts with their linkages for better understanding.

Here follows the class 11 Half Year Chemistry sample question paper to assess your knowledge.

Class 11 - Chemistry - Ch 14 - Environmental Chemistry - Atmospheric Pollution - Concept Points (#cbsenotes)(#eduvictors)

Environmental Chemistry Atmospheric Pollution Concept Points

Environmental Chemistry: 
The branch of chemistry which deals with the study of various chemical changes and reactions occurring in environment is called Environmental chemistry. It includes our surroundings as air, water, soil, forest etc.


Environment constitutes air, water, soil, plants and atmosphere around us.

Environmental Pollution: 
Environmental pollution is the effect of undesirable changes in our surroundings that have harmful effects on plants, animals and human beings.

Pollutants: 
A substance which causes pollution is known as pollutant. Pollutants can be solid, liquid or gaseous substances, present in higher concentration. It can be produced due to human activities or natural happenings.


Atmospheric Pollution:
The atmosphere that surrounds the earth is not of the same thickness at different heights. Atmospheric pollution is generally studied as tropospheric and stratospheric pollution.

Class 11/10/9/8 - Chemistry - Uses of Gases (Worksheet) (#eduvictors)(#cbsenotes)

Uses of Gases 

(Worksheet)

Fill the blanks:

1. The gas that can be used to fill party balloons is _______.

2. The gas that is used to make flash light is _______ .

3. The gas widely used in advertisement signs is _______.

4. The gas present in tungsten bulb is _______.

5. The gas present in the universe is _______.

CBSE Class 12/Class 11/Class 9 - DISCOVERIES IN ATOMIC STRUCTURE (#eduvictors)(#cbsenotes)

DISCOVERIES IN ATOMIC STRUCTURE

1. Dalton(1803) : Proposed Atomic Theory

2. Julius Plucker (1859) : First discoverer of cathode rays

3. Goldstein(1886) : Discovered anode rays and proton

4. Sir.J.J.Thomson(1897) : Discovered electron and determined charge/mass(e/m) ratio for electron

5. Rutherford(1891) : Discovered nucleus and proposed atomic model

CBSE Class 11 Chemistry -Syllabus (2017-18) (#cbsenotes)

Chemistry -Syllabus (2017-18)

CBSE Class 11 Chemistry

Here presents the prescribed syllabus for Class 11 Chemistry for the curriculum 2017-18.

CBSE Class 10 - Science - Four New Elements Added In Periodic Table

Four New Elements Added In 

Periodic Table

Time to update Chemistry Textbooks. On December 30, IUPAC completes the verification of discoveries of four new chemical elements. It completes the 7 periodic row.

The atomic numbers of these four new elements are 113, 115, 117 and 118. Soon the new names will be given to these elements. At present these elements have temporary names i.e.

Ununtrium 113, 
Ununpentium 115, 
Ununseptium 117, 
Ununoctium 118 

CBSE Class 11 - Chemistry - Thermodynamics

Thermodynamics 

(Short Q & A)

Q1: Define Thermodynamics

Answer: It is a physical science that deals with quantitative relation
between heat and mechanical energy. It is mainly based on three laws of thermodynamics.

Q2: Which law of thermodynamics evaluate thermodynamic parameters?

CBSE Class 9 and Class 11 to have PSA test from SA-II onwards

CBSE has asked CBSE affiliated schools to conduct a MCQ based exam called Problem Solving Assessment (CBSE-PSA) for class IX and XI from second term (SA-2) w.e.f. from January-Feburary 2013.
Later the test will be conducted for class X also.

Its score will be added in FA-4 which is 10% of total assessments of Class IX and class XI students will get a certificate. 

CBSE Class 11: Chemistry - CH1 - Laws of Chemical Combinations #chemistry #eduvictors

Antoine Lavoisier
credits:wikipedia

Laws of Chemical Combinations

Q1: List the laws that are collectively called Laws of Chemical combinations.

Answer:

1. Law of Conservation of Mass
2. Law of Constant Composition
3. Law of Multiple proportions
4. Law of reciprocal proportions
5. Law of Combining Volumes (Gay Lussac's law of Gaseous Volumes)
6. Avogadro Law

CBSE Class 11 - Chemistry - CH1 - Mole Concept

Q1: Define mole

Answer: A mole (or mol) is defined as the amount of substance which contains equal number of  particles (atoms / molecules / ions) as there are atoms in exactly 12.000g of carbon-12.

One mole of carbon-12 atom has a mass of exactly 12.000 grams and contains 6.02 × 10²³ atoms.

A mol is just a number like a dozen. A dozen equals to 12 eggs , a gross of Pencil equals to 144 Pencil. Similarly, mol is equal to 6.022 × 10²³(Avagadro constant). Mol is also known as chemist dozen.

How to learn naming Chemical Formulae?

Chemicals
(src:deviantart)

Nomenclature of Simple Inorganic compounds.

1. A formula is a shorthand notation used to identify the composition of a molecule or compound.

2. For example chemical formula of water is H₂O. It includes the symbol of each element (e.g. Hydrogen:H and Oxygen:O)  in the molecule, along with numerical subscripts to show how many atoms of each element are present.

3. Most of the inorganic compounds are binary compounds i.e. it consists of two elements. Some are ternary i.e. contain more than two elements.