RBSE Class 10 Science Sample Paper1

RBSE Class 10 Science Sample Paper 1 English Medium

Here we have given  Class 10 R.B.S.E BOARD Science Paper of year 2018 for English Medium Students.

RBSE Class 10 Science Sample Paper 1 English Medium

Time: 3.¼ Hours
Maxim Marks: 80

1. Candidate must write first his/her Roll on the question paper compulsory.
2. All the questions are compulsory.
3. Write the answer to each question in the given answer-book only.
4. For question having more than one part, the answers to those parts are to be written together in continuity.
5. If there is any error/difference/contradiction in Hindi & English versions of the question paper, the question of Hindi versions should be treated valid.

6. Part	Question Nos.	Marks per Question
   A	1 – 11	1
   B	12 – 21	3
   C	22 – 27	4
   D	28 – 30	5

7. There are internal choices in Q. No. 27 and Q.No 30.

Part – A

Question 1.
Write the name of enzyme secreted by salivary gland. [1]

Question 2.
Write the name of universal donor blood group. [1]

Question 3.
Write General formula of alkyne series. [1]

Question 4.
Write joule units in one kilowatt hour (1 kWh). [1]

Question 5.
Manali Sanctuary is situated in which state? [1]

Question 6.
Write the name of one Kharif crop. [1]

Question 7.
How many hotspots of biodiversity are in the world? [1]

Question 8.
Write the name of instrument which is used to measure the blood pressure. [1]

Question 9.
Write the name of an antibody present in mother’s milk. [1]

Question 10.
Which vaccine is used in the treatment of erythroblastosis foetalis? [1]

Question 11.
Draw graph between area of cross-section (A) and resistance of different conducting wires which are made by same material having equal length. [1]

Part – B

Question 12.
What are internal tectonic forces of earth? Explain any two forces. [3]

Question 13.
What is fossil? Write the name of two vestigial organs found in human body. [3]

Question 14.
Write the name of first spacecraft of India. Explain the importance of satellites launched by India. [3]

Question 15.
(a) What quantity of alcohol in body is required for punishment when measured by breath analyzer? [3]
(b) Explain the points of “Road Safety Education”.

Question 16.
(a) Write any two diseases caused by virus. [3]
(b) Write the name of alkaloid found in tobacco.
(c) Write two harmful effects of chewing tobacco.

Question 17.
Write any one difference between the following : [3]
(a) Positive and Negative catalyst.
(b) Thermolysis and Electrolysis.
(c) Addition and Replacement reaction.

Question 18.
What is the meaning of Jhoom cultivation9 Write two main components of social foresty. [3]

Question 19.
Who is known as Missile man? Give the role of Dr. Panchanan Maheshwari in field of botany. [3]

Question 20.
Writhe IUPAC names of the following compounds: [3]

Question 21.
What is waste? Explain two methods of waste management. [3]

Part-C

Question 22.
(a) Write the name of silk worm Larva.
(b) Write the two products of Apiculture.
(c) How the thread of silk is made by silt worm? [4]

Question 23.
What is reciprocal cross? Explain the phenotypic and genotypic ratio obtained in offsprings, when F1 generation is crossed with Homozygous dominant parents. [4]

Question 24.
(a) Write formula of bleaching powder. Explain its bleaching process.
(b) Draw labeled diagram of chemical reaction of Zn metal with dilute H2S04. [4]

Question 25.
(a) An observer takes two observations as given below while performing Ohm’s law experiment : [4]

S.No.	Ammeter reading	Voltmeter reading
1.	0.50 Amp	2 Volt
2.	0.75 Amp	3 Volt

Determine resistance of conducting wire for each observation.
(b) Nichrome resistance coil, of 25 Ω is connected with 12 Volt accumulator cell (Battery) and current flows through it for 15 minutes. Determine heat produced in this coil.

Question 26.
(a) A force is applied upon a body of 40 kg then its velocity increases from 1 meter/second to 2 meter/second. Determine work done by the force.
(b) A spring of spring constant K = 4x 103N/m is compressed by 2cm then determine potential energy stored in spring. [4]

Question 27.
What is Biodiversity? Explain the in-situ and ex-situ conservation. [4]

OR

What is the genetic diversity? Explain two reasons of threats to biodiversity.

Part – D

Question 28.
(a) What is respiration?
(b) Draw a labeled diagram of human respiratory system.
(c) Explain the mechanism of respiration. [5]

OR

(a) Write the name of primary sex organ in female.
(b) Draw a labeled diagram of female reproductive system.
(c) Explain two phases of human reproduction. [5]

Question 29.
(a) Elements of which block shows variable valency in periodic table?
(b) Why size of anion is greater than its atom?
(c) CaH2, NaH, SiH4, AlH3
Give valencies of Ca, Na, Si and Al in the above compounds. [5]

OR

(a) Write names of any two metalloids.
(b) How does atomic size changes on moving from left to right in a period? Explain with reason.
(c) Arrange the following elements in the ascending order of their atomic size: Na, Cs, Li, K [5]

Question 30.
(a) The sun is visible a little before the actual sun rise and a little bit after the actual sunset. Explain the reason.
(b) What does mean by the dispersion of white light?
(c) What does mean by the total internal reflection of light?
(d) Draw ray diagram for image formation by concave lens when the object is placed between infinity and optical center ‘O’. [5]

OR

(a) A pencil partly immersed in water in a glass tumbler appears asked why?
(b) What does mean by the power of a lens?
(c) What is astigmatism in human eye?
(d) Draw ray diagram for image formation by concave mirror when object is placed between center of curvature ‘C’ and focus ‘F’ [5]

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