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:

  1. Mole Fraction
  2. Avogadro’s Law
  3. Isotope Meaning
  4. Relation between Molarity and Molality
  5. Atomic Mass Of Elements
  6. 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.

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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.

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CBSE CLASS XII Related Questions

  • 1.
    Which of the following Grignard Reagent will be used to prepare cyclohexylmethanol when treated with methanal?

      • A
      • B
      • C
      • D

    • 2.
      What happens when acidic solution of potassium permanganate is allowed to stand for sometime ? Give the equation involved. What is this type of reaction called ?


        • 3.
          Name the cell which was used in the Apollo space programme for providing electrical power.


            • 4.
              Half-life (\( t_{1/2} \)) of a first order reaction is 1386 s. The value of rate constant is:

                • \(0.5 \times 10^{-4} \, \text{s}^{-1}\)
                • \(5.0 \times 10^{-4} \, \text{s}^{-1}\)
                • \(0.5 \times 10^{-5} \, \text{s}^{-1}\)
                • \(0.5 \times 10^{-3} \, \text{s}^{-1}\)

              • 5.
                Calculate emf of the following cell at 298 K: \[ \text{Cr(s)} \, | \, \text{Cr}^{3+} (aq) \, (0.1\, M) \; || \; \text{Fe}^{2+} (aq) \, (0.01\, M) \, | \, \text{Fe(s)} \] Given: \[ E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74 \, V, \quad E^\circ_{\text{Fe}^{2+}/\text{Fe}} = -0.44 \, V, \quad \log 10 = 1 \]


                  • 6.
                    Assertion (A): D(+)-Glucose is dextrorotatory in nature.
                    Reason (R): (+) represents dextrorotatory nature and D represents its configuration.

                      • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
                      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
                      • Assertion (A) is true, but Reason (R) is false.
                      • Assertion (A) is false, but Reason (R) is true.
                    CBSE CLASS XII Previous Year Papers

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