CBSE Sample Papers e Papers for sophistication ten Science Set one with Solutions
Time: three Hours
Maximum Marks: eighty
General Instructions:
(i) The question paper includes four sections A, B, C and D. There ar thirty six queries within the question paper. All queries ar obligatory.
(ii) Section-A – question no. one to twenty – all queries and components there of ar of 1 mark every.
These queries contain multiple alternative queries (MCQs), terribly short answer queries and assertion – reason kind queries. Answers to those ought to lean in one word or one sentence.
(iii) Section-B – question no. twenty one to twenty six ar short answer kind queries, carrying two marks every. Answers to those queries ought to within the vary of thirty to fifty words.
(iv) Section-C – question no. twenty seven to thirty three ar short answer kind queries, carrying three marks every.
Answers to those queries ought to within the vary of fifty to eighty words. :
(v) Section—D – question no. – thirty four to thirty six ar long answer kind queries carrying five marks every. Answer to those queries ought to be within the vary of eighty to one hundred twenty words.
(vi) there's no overall alternative. However, internal decisions are provided in some queries. A student should try just one of the alternatives in such queries.
(vii) where necessary, neat and properly tagged diagrams ought to be drawn.
Section – A
Question 1.
A ladies gave birth to a lady. Name the body from spermatozoon accountable for the offspring.
Answer:
Sperm with sex chromosome from male is accountable for the birth of feminine and sex chromosome would be accountable for the male person. thus for the given case, sex chromosome from spermatozoon is accountable for the offspring.
Question 2.
Name the gases that have replaced CFCs.
Answer:
HFCs (Hydrofluorocarbons)
Perfluorocarbons (PFCs) have replaced CFCs.
Question 3.
When quicklime is superimposed to water, it fully dissolves in water while not forming bubbles. What product is made during this reaction?
Answer:
Ca(OH)2
Question 4.
A plant gets obviate excess water through transpiration. what's the strategy utilized by plants to induce obviate solid waste products?
Answer:
Shedding of yellow leaves
Question 5.
In peas, a pure tall plant (TT) is crossed with a brief plant (tt). what's the magnitude relation of pure tall plants to short plants in F2?
Answer:
3 : 1
Question 6.
State the direction of magnetic flux within the following case.
Answer:
Sample Paper category ten Science Set one.1
Perpendicular to the plane of paper within the outward direction by mistreatment Fleming’s mitt rule.
Question 7.
Why valency compounds have low melting and boiling points?
OR
What is catenation?
Answer:
As the bond is made by sharing of electrons between 2 atoms. building block forces ar little between the valency compounds. These bonds break simply.
OR
Carbon has the distinctive ability to make bonds with the opposite atoms of carbon which supplies rise to giant molecules. This property of self linking is termed catenation.
Question 8.
What is the formula of compound and binary compound of cluster I elements?
OR
What ar isotopes?
Answer:
Oxide formula → R2O; binary compound formula → RH.
‘R’ represents cluster I component. F-31
OR
Isotopes ar the atoms of same component having same number however totally different nucleon number.
Sample Paper category ten Science Set one.2
Question 9.
Why ar the rings of gristle gift in air tube—Trachea?
OR
In what kind is food energy keep in plants and animals?
Answer:
Rings of gristle prevents the trachea from collapsing.
OR
Plants—Starch; Animals—Glycogen.
Question ten.
List 2 functions performed by the ball in people at large.
OR
What happens once a mature chlorophyte filament attains goodly length?
Answer:
To produce sperms
To produce male sex hormone/testosterone
OR
Its filament breaks up into smaller fragments or items, and every fragment grows into a replacement filament/individual. is
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