NCERT Solutions For Class 11 Chemistry Chapter 1: Some Basic Concepts of Chemistry

NCERT Solutions for class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry are provided in the article. Some of the important topics of Some Basic Concepts of Chemistry chapter include:

Mole Fraction
Avogadro’s Law
Isotope Meaning
Relation between Molarity and Molality
Atomic Mass Of Elements
Mass Spectrometry

Expected no.of questions: 2 to 4 questions of total 7 marks.

Download PDF: NCERT Solutions for Class 11 Chemistry Chapter 1 pdf

NCERT Solutions for Class 11 Chemistry Chapter 1

NCERT Solutions for Class 11 Chemistry Chapter 1 Some Basic Concepts of Chemistry is given below.

NCERT Solutions

NCERT Solutions for Class 11 Chemistry

Matter can be defined as anything which has mass and occupies space. There are three states of matter namely Solid, Liquid and Gas.

Solid: Solid consists of particles which are tightly bound together. They have fixed geometrical shape.
Liquid: They are loosely bound particles and do not have any fixed shape but they take the shape of the container in which they are kept.
Gas: Gases consists of very loosely bound particles and do not have any shape.

Some of the basic physical unit of matter or fundamental SI units are as follows:

Mass – Kilogram (kg)
Length – Meter (m)
Time – Seconds (s)
Luminous intensity – Candela (Cd)
Amount of substance – Mole (mol)
Temperature – Kelvin (K)
Electric current – Ampere (A)

Mixtures are of two types: Homogeneous and Heterogeneous.

Homogeneous Mixtures: Homogeneous mixture can be defined as a mixture where the composition of the mixture is uniform throughout.
Heterogeneous Mixtures: Heterogeneous types of mixture are those where all the elements don't mix.

Related Class 11 Chemistry Chapter 1 Articles:

Mole Concept	Mole Fraction	Avogadro Constant
Number of Moles Formula	Isotopes and Isobars	Normality and Molality
Concentration of Solution	Molar mass and Molucular mass	Abnormal Molar masses

Chemistry Related Articles:

NCERT Solutions for Class 11 Chemistry	Important Chemistry Formulas	Chemistry Study Material
Difference between Articles in Chemistry	Important Named Reactions	Chemistry Notes

CBSE CLASS XII Related Questions

1.
Calculate the freezing point of a solution when 10.5 g of MgBr$_2$ was dissolved in 250 g of water, assuming MgBr$_2$ undergoes complete dissociation. Given: \[ \text{Molar mass of MgBr}_2 = 184 \, g\,mol^{-1} \] \[ K_f \text{ for water} = 1.86 \, K\,kg\,mol^{-1} \] (ii) Write two differences between ideal and non-ideal solutions.
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2.
Why second ionization enthalpies of chromium and copper are exceptionally higher than those of their neighbouring elements?
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3.
According to Werner's theory, the primary valencies of the central metal atom :
- are satisfied by neutral molecules or negative ions.
- are equal to its coordination number.
- are satisfied by negative ions.
- are non-ionisable.
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4.
The following reactions occur at the anode during the electrolysis of aqueous sodium chloride solution: \[ Cl^-_{(aq)} \rightarrow \frac{1}{2}Cl_2(g)+e^- \qquad E^\circ_{\text{cell}}=1.36\,V \] \[ 2H_2O(l) \rightarrow O_2(g)+4H^+(aq)+4e^- \qquad E^\circ_{\text{cell}}=1.23\,V \] Which reaction is feasible at the anode and why?
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5.
What is meant by lanthanoid contraction? (ii) Why do transition metals form coloured compounds? (iii) Why are $E^\circ_{M^{2+}/M}$ values for Mn and Zn more negative than expected? (iv) Which is the most stable oxidation state of Cu and why? (v) Why is Ce$^{4+}$ in aqueous solution a good oxidising agent?
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6.
Why is C--O--C bond angle in ethers slightly greater than tetrahedral angle?
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