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.
A reaction \( \mathrm{A \rightarrow B} \) follows second order kinetics. How will the rate of reaction be affected if the concentration of (i) A is increased by three times, and (ii) A is reduced to half ?
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2.
(i) A first order reaction is 20% complete in 10 minutes. Calculate the time taken when 80% of the reaction will be completed.
[Given : \( \log 5 = 0.7 \), \( \log 4 = 0.6 \)]
(ii) For a chemical reaction \( \mathrm{R \rightarrow P} \), variation in \( \ln[\mathrm{R}] \) vs. time (t) graph is given below :
(I) Predict the order of the reaction.
(II) Write the slope of the curve.
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3.
(a) Write two structural differences between DNA and RNA.
(b) Which component of starch is a branched chain polymer of \( \alpha \)-D-(+)-glucose ? Write its one characteristic feature.
(c) Which types of bonds hold the polypeptide chains in fibrous proteins ?
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4.
(i) Give a chemical test to distinguish between Propanal and Propanone.
(ii) Which of the given acids is stronger and why ? \( \mathrm{F_3C{-}C_6H_4{-}COOH} \) or \( \mathrm{H_3C{-}C_6H_4{-}COOH} \)
(iii) Complete the given reaction sequence :
\[ \mathrm{CH_3CH_2CH_2COOC_2H_5} \xrightarrow{\mathrm{NaOH}} \mathrm{A + C_2H_5OH} \]
\[ \mathrm{A} \xrightarrow{\mathrm{H_3O^+}} \mathrm{B} \]
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5.
Match Column I with Column II and choose the correct option :
Column I Column II
a. Osmotic pressure i. \( \Delta \mathrm{T_f} = \mathrm{K_f}\,m \)
b. Elevation of boiling point ii. \( \pi = CRT \)
c. Depression of freezing point iii. \( \frac{\mathrm{P_1^0 - P_1}}{\mathrm{P_1^0}} = \frac{\mathrm{W_2 \times M_1}}{\mathrm{M_2 \times W_1}} \)
d. Relative lowering of vapour pressure iv. \( \Delta \mathrm{T_b} = \mathrm{K_b}\,m \)

Column I	Column II
a. Osmotic pressure	i. \( \Delta \mathrm{T_f} = \mathrm{K_f}\,m \)
b. Elevation of boiling point	ii. \( \pi = CRT \)
c. Depression of freezing point	iii. \( \frac{\mathrm{P_1^0 - P_1}}{\mathrm{P_1^0}} = \frac{\mathrm{W_2 \times M_1}}{\mathrm{M_2 \times W_1}} \)
d. Relative lowering of vapour pressure	iv. \( \Delta \mathrm{T_b} = \mathrm{K_b}\,m \)

a-i, b-ii, c-iii, d-iv
a-ii, b-i, c-iii, d-iv
a-iv, b-iii, c-ii, d-i
a-ii, b-iv, c-i, d-iii

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6.
(a) Define 'Denatured Protein' with an example.
(b) What happens when glucose reacts with HCN ? Write the reaction involved.
(c) Name the disease caused by the deficiency of Vitamin C.
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