Advertisement Remove all ads

Science Delhi set 1 2018-2019 CBSE Class 10 Question Paper Solution

Advertisement Remove all ads
Science [Delhi set 1]
Marks: 80Academic Year: 2018-2019
Date: March 2019

SECTION - A
[1]1

Answer the following question.
What is the function of a galvanometer in a circuit?

Concept: Electric Current
Chapter: [0.042] Effects of Current
[1]2

Answer the following question.
Why is biogas considered excellent fuel?

Concept: Improvements in the Technology for Using Conventional Sources of Energy
Chapter: [0.053] Sources of Energy
Section B
[2]3
[2]3.1

Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?

Concept: The Modern Periodic Table
Chapter: [0.013000000000000001] Periodic Classification of Elements
OR
[2]3.2
[1]3.2.1

The electronic configuration of an element is 2, 8, 4. State it: 
group and period in the Modern Periodic Table.

Concept: Periodic Properties
Chapter: [0.013000000000000001] Periodic Classification of Elements
[1]3.2.2

The electronic configuration of an element is 2, 8, 4. State it: 
name and write its one physical property.

Concept: Periodic Properties
Chapter: [0.013000000000000001] Periodic Classification of Elements
[2]4

Answer the following question.
Write two different ways in which glucose is oxidized to provide energy in the human body. Write the products formed in each case.

Concept: Nutrition - Nutrition in Human Beings
Chapter: [0.024] Life Processes
[2]5

Define the term: Power of accommodation of the eye.

Concept: Human Eye: Structure of the Eye
Chapter: [0.03] Natural Phenomena

Answer the following question.
Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?

Concept: Spherical Mirrors
Chapter: [0.03] Natural Phenomena
Section C
[3]6
[3]6.1

Answer the following question.
2 g of silver chloride is taken in a china dish and the china dish is placed in sunlight for some time. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

Concept: Types of Chemical Reactions - Decomposition Reactions
Chapter: [0.015] Chemical Reactions
[3]6.2
[2]6.2.1

Identify the type of reaction taking place in the following case and write the balanced chemical equation for the reaction.
Zinc reacts with silver nitrate to produce zinc nitrate and silver.

Concept: Types of Chemical Reactions - Single Displacement Reactions
Chapter: [0.015] Chemical Reactions
[1]6.2.2

Identify the type of reaction taking place in the following case and write the balanced chemical equation for the reaction.
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.

Concept: Types of Chemical Reactions - Double Displacement Reaction
Chapter: [0.015] Chemical Reactions
[3]7

Answer the following question.
Identify the acid and the base from which sodium chloride is obtained. Which type of salt is it? When is it called rock salt? How is rock salt formed?

Concept: Acids
Chapter: [0.013999999999999999] Acids, Bases and Salts
[3]8

Based on the group valency of element write the molecular formula of the following compound giving justification:
Oxide of first group elements.

Concept: Periodic Properties
Chapter: [0.013000000000000001] Periodic Classification of Elements

Based on the group valency of element write the molecular formula of the following compound giving justification:

Halide of the elements of group thirteen

Concept: Periodic Properties
Chapter: [0.013000000000000001] Periodic Classification of Elements

Based on the group valency of element write the molecular formula of the following compound giving justification:

Compound formed when an element A of group 2 combines with an element B of group seventeen.

Concept: Periodic Properties
Chapter: [0.013000000000000001] Periodic Classification of Elements
[3]9

Answer the following question.
Write three types of blood vessels. Give one important feature of each.

Concept: Concept of Transportation
Chapter: [0.024] Life Processes
[3]10

Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.

Concept: Human Eye: Structure of the Eye
Chapter: [0.03] Natural Phenomena
Advertisement Remove all ads
[3]11

Answer the following question.
What are plant hormones? Name the plant hormones responsible for the following:
(i) Growth of stem
(ii) Promotion of cell division
(iii) Inhibition of growth
(iv) Elongation of cells

Concept: Coordination in Plants - Movement Due to Growth
Chapter: [0.023] Control and Co-ordination in Animals and Plants
[3]12
[3]12.1

Answer the following question.
Name the plant Mendel used for his experiment. What type of progeny was obtained by Mendel in F1 and F2 generations when he crossed the tall and short plants? Write the ratio he obtained in F2 generation plants.

Concept: Rules for the Inheritance of Traits - Mendel’S Contributions
Chapter: [0.021] Heredity and Evolution
OR
[3]12.2

List three distinguishing features, in tabular form, between acquired traits and the inherited traits.

Concept: Evolution - Acquired and Inherited Traits
Chapter: [0.021] Heredity and Evolution
[3]13

Answer the following question:
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.

Concept: Some Natural Phenomena Due to Sunlight
Chapter: [0.03] Natural Phenomena
[3]14
[3]14.1

Answer the following question.
How can we help in reducing the problem of waste disposal? Suggest any three methods.

Concept: Waste Production and Their Solutions
Chapter: [0.052000000000000005] Our Environment
OR
[3]14.2

Answer the following question.
Define an ecosystem. Draw a block diagram to show the flow of energy in an ecosystem.

Concept: Concept of Eco-System
Chapter: [0.052000000000000005] Our Environment
[3]15

Answer the following question.
What is water harvesting? 

Concept: Water Management (Conservation of Water) - Fresh Water Management
Chapter: [0.051] Management of Natural Resources

Answer the following question.
List two main advantages associated with water harvesting at the community level.

Concept: Natural Resources - Water for All - Water Harvesting
Chapter: [0.051] Management of Natural Resources

Answer the following question.
Write two causes for the failure of sustained availability of groundwater.

Concept: Natural Resources - Water for All - Water Harvesting
Chapter: [0.051] Management of Natural Resources
SECTION -D
[5]16
[3]16.1

Answer the following question.
List in tabular from three chemical properties on the basis of which we can differentiate between a metal and a non-metal.

Concept: Difference Between Metals, Non-metals, and Metalloids
Chapter:
[2]16.2

Give reasons for the following:
Most metals conduct electricity well.

Concept: Difference Between Metals, Non-metals, and Metalloids
Chapter:

Give reasons for the following:
The reaction of iron (III) oxide [Fe2O3] with heated aluminum is used to join cracked machine parts.

Concept: Types of Chemical Reactions - Single Displacement Reactions
Chapter: [0.015] Chemical Reactions
[5]17
[5]17.1

Answer the following question.
Write the chemical formula and name of the compound which is the active ingredient of all alcoholic drinks. List its two uses.

Write the chemical equation and name of the product formed when this compound reacts with -
(i) Sodium metal  
(ii) hot concentrated sulphuric acid

Concept: Ethanol
Chapter: [0.011000000000000001] Carbon Compounds
OR
[5]17.2

Answer the following question.
What is methane?

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds

Answer the following question.
Draw methane electron dot structure.

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds

Answer the following question.
Name the type of bonds formed in the methane compound.

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds

Answer the following question.
Why are methane compounds have poor conductors of electricity?

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds

Answer the following question.
Why are methane compounds have low melting and boiling points?

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds

Answer the following question.
What happens when methane compound burns in oxygen?

Concept: Carbon: a Versatile Element
Chapter: [0.011000000000000001] Carbon Compounds [0.011000000000000001] Carbon Compounds
[5]18
[5]18.1

Answer the following question.
What is pollination? Explain the different types of pollination.

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.022000000000000002] Reproduction

Answer the following question.
List two agents of pollination?

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.022000000000000002] Reproduction

Answer the following question.
How does suitable pollination lead to fertilization?

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.022000000000000002] Reproduction
OR
[5]18.2
Advertisement Remove all ads
[2]18.2.1

Identify the given diagram.
Name the parts 1 to 5. 

Concept: Human Reproductive System
Chapter: [0.022000000000000002] Reproduction
[3]18.2.2

Answer the following question.
What is contraception? List three advantages of adopting contraceptive measures.

Concept: Human Reproductive System
Chapter: [0.022000000000000002] Reproduction
[5]19

An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm.
(i) Use the lens formula to find the distance of the image from the lens.
(ii) List four characteristics of the image (nature, position, size, erect/inverted) formed by the lens in this case.
(iii) Draw a ray diagram to justify your answer of the part (ii).

Concept: Concave Lens
Chapter: [0.03] Natural Phenomena [0.03] Natural Phenomena
[5]20
[5]20.1

Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances. 

Concept: Electric Circuit
Chapter: [0.042] Effects of Current
OR
[5]20.2

Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 

(a) the total resistance of the circuit,  

(b) the current through the circuit, 

(c) the potential difference across the  (i) electric lamp and (ii) conductor, and

(d) power of the lamp.

Concept: Electric Current
Chapter: [0.042] Effects of Current
[5]21

Answer the following term.
What is a solenoid?

Concept: Magnetic Field Due to a Current in a Solenoid
Chapter: [0.040999999999999995] Magnetic Effects of Current

Answer the following question.
Draw the pattern of magnetic field lines of
(i) a current-carrying solenoid and
(ii) a bar magnet.
List two distinguishing features between the two fields.

Concept: Magnetic Field Lines
Chapter: [0.040999999999999995] Magnetic Effects of Current
Section E
[2]22
[2]22.1

Answer the following question.
Blue litmus solution is added to two test tubes A and B containing dilute HCl and NaOH solution respectively. In which test tube a colour change will be observed? State the colour change and give its reason.

Concept: Acid Or a Base in a Water Solution
Chapter: [0.013999999999999999] Acids, Bases and Salts
OR
[2]22.2

Answer the following question.
What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write a chemical equation for the reaction involved.

Concept: Chemical Equation
Chapter: [0.015] Chemical Reactions [0.015] Chemical Reactions
[2]23

Answer the following question.
In three test tubes A, B, and C, three different liquids namely, distilled water, underground water and distilled water in which a pinch of calcium sulphate is dissolved, respectively are taken. Equal amount of soap Answer is added to each test tube and the contents are shaken. In which test tube will the length of the foam (lather) be longest? Justify your answer.

Concept: Soap
Chapter: [0.011000000000000001] Carbon Compounds
[2]24
[2]24.1

A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.022000000000000002] Reproduction
OR
[2]24.2

Draw a labelled diagram in proper sequence to show budding in hydra

Concept: Reproduction in Plant - Modes of Reproduction Used by Single Organisms - Budding
Chapter: [0.022000000000000002] Reproduction
[2]25

Answer the following question.
In the experimental set up to show that "CO2 is given out during respiration", name the substance taken in the small test tube kept in the conical flask. State its function and the consequence of its use.

Concept: Concept of Respiration
Chapter: [0.024] Life Processes
[2]26
[2]26.1

Answer the following question.
While studying the dependence of potential difference ( V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and t. He got a straight line graph passing through the origin. What does the straight-line signify? Write the method of determining the resistance of the resister using this graph. 

Concept: System of Resistors - Resistors in Series
Chapter: [0.042] Effects of Current
OR
[2]26.2

Answer the following question.
What would you suggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales when the circuit is open? No extra ammeter/voltmeter is available in the laboratory.

Concept: Electric Potential Difference
Chapter: [0.042] Effects of Current
Advertisement Remove all ads
[2]27

Answer the following question.
List four precautions which a student should observe while determining the focal length of a given convex lens by obtaining an image of a distant object on a screen. 

Concept: Convex Lens
Chapter: [0.03] Natural Phenomena [0.03] Natural Phenomena
Advertisement Remove all ads

Request Question Paper

If you dont find a question paper, kindly write to us





      View All Requests

Submit Question Paper

Help us maintain new question papers on Shaalaa.com, so we can continue to help students




only jpg, png and pdf files

CBSE previous year question papers Class 10 Science with solutions 2018 - 2019

     CBSE Class 10 Science question paper solution is key to score more marks in final exams. Students who have used our past year paper solution have significantly improved in speed and boosted their confidence to solve any question in the examination. Our CBSE Class 10 Science question paper 2019 serve as a catalyst to prepare for your Science board examination.
     Previous year Question paper for CBSE Class 10 Science-2019 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
     By referring the question paper Solutions for Science, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of CBSE Class 10.

How CBSE Class 10 Question Paper solutions Help Students ?
• Question paper solutions for Science will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×