Class 10 Science Board Exam Sample Paper -5

In this page we have Class 10 Science Board Exam Sample Paper -5 . Hope you like them and do not forget to like , social share and comment at the end of the page.

The question paper comprises of the two Section, A and B. you are to attempt both the sections.
All questions are compulsory.


Question 1
Write SI unit of resistivity.

Question 2
Write the role of motor areas in brain.

Question 3
In a pea plant, the trait of flowers bearing purple colour (PP) is dominant over white colour (pp). Explain the inheritance pattern of F1 and F2 generations with the help of a cross following the rules of inheritance of traits. State the visible characters of F1and F2 progenies

Question 4
Give reason for the following:
(a)Dry HCI does not change the color of dry litmus paper.
(b)Aqueous solution of an acid conduct electricity.

Question 5
Give chemical equation to show the changes that occur when green colored Ferrous Sulphate crystals are heated. Mention change observed as well as reason for this change.

Question 6
Define a solenoid? How is it different from a coil?

Question 7
Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.
a. What will be set of genes present in the F1 generation?
b. Give reason why only tall plants are observed in F1 progeny.
c. When F1 plants were self - pollinated, a total of 800 plants were produced.How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.

Question 8
(a)"Sodium is a highly reactive mental and it cannot be obtained from its oxide by heating with carbon" Give reason.
(b)How can sodium be obtained from sodium chloride.

Question 9
(a) What is meant by corrosion?
(b) Why do aluminium sheets not corrode easily.
(c) Why is copper vessel covered with a green coating in rainy season?

Question 9
A solution ‘X’ turns red litmus blue. Predict the nature of solution ‘X’. addition of which solution of same concentration would cause reverse change- Mg(OH)2 or H2SO4 solution. Give reason for your answer. What happens when this solution is added:
(i)In equal amount
(ii)In excess;

Question 10
Justify the statement ‘All ores are minerals but all animals are not ores’. Give one example which can be called both ore and mineral.

Question 11
(a) The highest
(b) The lowest value of resistance that can be obtained by the combination of four resistors of 4 , 8 , 12 , and 24 .

Question 12
We have a piece of copper wire of resistance R. this wire is drawn out so that its length is doubled. Find the new resistance of the wire in terms of its original resistance.

Question 13
How will you use two identical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light? Draw the diagram

Question 14
(a) How guard cells regulate stomata opening and closure?
(b)Explain holozonic nutrition.

Question 15
(a) Write functions of medulla.
(b)What type of movement is shown by mimosa plant leaves when touched with a finger?
c)Name the master gland present in the brain.

Question 16
Explain any three directional movements in plants.

Question 17
(a)Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?
(b) What type of arrangement exists in the bodies of large animals to meet their oxygen Required adequately?

Question 18
Rohit wants to have an erect image of an object using a converging mirror of focal length 40 cm.
(a) Specify the range of distance where the object can be placed in front of the mirror. Justify.
(b) Draw a ray diagram to show image formation in this case.
(c) State one use of the mirror based on the above kind of image formation.

Question 19
Sheelu was visiting her city after one year. Since during summers there were frequent power breakdown, she was a bit uncomfortable thinking about the unruly traffic in the city without traffic signals. But to her surprise, she found that all the traffic signals were working, inspite of the load shedding. She saw that all the traffic signal were powered by the solar cell panels. At one particular signals she saw that some naughty boys were trying to break the solar panel. She stopped them from doing so and explained them not to do so.
(a)State the value exhibited by Sheelu
(b)Explain any two arguments in favour of using solar panels for running traffic signals for managing traffic.

Question 20
Compose on activity to arrange Ca, Mg and Fe metals in the decreasing order of reactivity with water. Write suitable balanced chemical equation and draw diagrams.
Question 21
A students tested four unknown samples A, B, C and D and found color change on pH paper as follows: A (green), B (Blue), C (Red) and D (Orange).
(i) Predict the nature of the four samples.
(ii) Arrange the samples A, B, C, D in their decreasing acidic strength.
(iii)Identify the sample which is highly acidic and highly alkaline what happens to their pH on dilution.

Question 22
Describe an activity with the help of diagram of an electric circuit to show that in a series combination of resistances, the current is same in every part of the circuit.
Draw the symbols used for same components in circuit diagrams.
(i)Plug key (closed) (ii) battery

Question 23
(i)Explain the following:
(a)Why is tungsten used almost exclusively for filament of electric lamp.
(b)How does the resistance of a conducting wire vary with its are of cross section.
(c)Why are copper and aluminium wire usually employed for electricity transmission.
(ii)State Ohm’s Law and define one ohm.

Question 24
What is double circulation? Why is it found in birds and mammals and not in fishes? How is oxygen and carbon dioxide transported in blood?

Section B

Question 25
A student added red litmus solution to ‘A’ and observed that it changed into blue. When she added another solution ‘B’ to ‘A’ in excess, she observed that the solution turned red. The solution A and B are:
(a)KOH and KCI
(b)HCI and KOH
(c)KOH and HCI
(d)HCI and H2CO3

Question 26
Identify the ions in dil. HCI which are responsible for its acidic nature:

Question 27
On adding a pinch of a white powder to some dil. HCI in a test CO2 gas is evolved with brisk effervescence. The white powder is:
(a)Ammonium chloride
(b)Calcium oxide
(c)Sodium carbonate
(d)Sodium chloride

Question 28
Nandu wants to carry out a displacement reaction in the laboratory. The correct set of chemicals he should choose is:
(a)Iron sulphide, distilled water, a pieces of copper metal
(b)Copper sulphate, iron nail, distilled water
(c)Ferrous sulphate, distilled water, copper metal
(d)Copper sulphate, distilled water, copper metal

Question 29
The correct pair of salt solutions to demonstrate double displacement reaction is:
(a)Barium sulphate and sodium sulphate
(b)Barium chloride and sodium chloride
(c)Barium chloride and barium sulphate
(d)Barium chloride and sodium sulphate

Question 30
Soma added a few iron filings to 5ml of CuSO4 solution in a test tube. The change of color she will observe is:
(a)Pale green to blue
(b)Blue to white
(c)Blue to pale green
(d)Pale green to colorless

Question 31
Ravi took some crystals of FeSO4 and make its solution in water. He observed the color of the solution to be:
(b)Pale green
(c)Dark green
(d)Dark blue

Question 32
When current flows through heater coil it glows but supply wiring does not glow because:
(a)Supply wiring is covered with insulation layer
(b)Current through supply line flows ay slower speed
(c)Supply wires are made of superior material
(d)Resistance of heater coil is very high and that of supply wires is negligible.

Question 33
Two copper wires A & B have diameters t1 & t2 respectively with t1>t2. The resistance will be
(a)More for A
(b)More for B
(c)Same for A & B
(d)Cannot be compared

Question 34
Ohm's law describes the mathematical relationship between:
(a)Voltage and resistance only
(b)Resistor size and resistor value
(c)Resistance, voltage and current
(d)Electric power and voltage

Question 35
In the circuit shown below, the value of the current in ammeter depends upon

(a)Only R1
(b)Only R2
(c)Both R1 and R2
(d)Neither R1 nor R2

Question 36
A teacher divided a wire of resistance 1 Ohm into two halves and asked her students to find equivalent resistance of a combination when both halves connected in parallel. The resistance Measured should be:
(a).1 Ohm
(b).2 Ohm
(c)0.5 Ohm
(d)0.25 Ohm

Question 37
Observe the three figures given below. Which of the following depicts tropic movements appropriately?

(a)B and C
(b)A and C
(c)B only
(d)C only

Question 38
Stomata pore opens when:
(a)Water from surrounding cells enter into guard cells
(b)Water from guard cells goes to the surrounding cell
(c)Te plants are in dark
(d)No movement of water occurs between guard cells and surrounding cell

Question 39
In the experiment to prove that light is essential for photosynthesis, one of the item is not used in the procedure. Identify it.
(b)Black paper
(c)Starch solution
(d)Water bath

Question 40
In submerged water plants (e.g. hydrilla)
(a)Light is not needed for photosynthesis
(b)Photosynthesis does not occur
(c)Light is necessary for photosynthesis
(d)Carbon dioxide is not required for photosynthesis

Question 41
A student while setting up the experiment to show that CO2 is evolved during respiration, committed some errors shown in the figure.

The change that should be made in the set up to get the desired results is:
(a)KOH should be taken in the small test tube inside the flask and germinating seeds in beaker.
(b)KHO solution should be taken in the small test tube inside the flask and water should be taken in the beaker.
(c)Water should be taken in the beaker and KHO solution in the flask.
(d) Water should be taken in the flask and KHO solution in the small test tube.

Question 42

While looking at the above diagram, Nalini concluded the following
i. the image of the object will be a virtual one.
ii. the reflected ray will travel along the same path as the incident ray but in opposite direction.
iii. the image of the object will be inverted.
iv. this is a concave mirror and hence the focal length will be negative.
Which one of the above statements are correct?
A. i and ii
B. i and iii
C. ii, iii and iv
D. i, ii, iii and iv


This Class 10 Science Board Exam Sample Paper -5 is prepared keeping in mind the latest syllabus of CBSE . This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.

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