HPBOSE SOS Class 10 Model Question Paper Science

MODEL QUESTION PAPER
Science and Technology (SOS)
Class : 10th

Time Allowed : 3 Hours Maximum Marks : 75
Áfl‡Ê· ÁŸº¸‡Ê —
Special Instructions :
v. ¬˝‡Ÿ ‚¢ÅÿÊ v ‚ vz Ã∑§ •Áà ‹ÉÊÈ-©UûÊ⁄UËÿ ¬˝‡Ÿ „Ò¥U– ߟ∑§ ©UûÊ⁄U ∞∑§
‡Êéº ÿÊ ∞∑§ flÊÄÿ ‚ •Áœ∑§ Ÿ „UÙ¥–
Question Nos. 1 to 15 are very short answer type
questions. Their answer should not be more than one
word or a sentence.
w. ¬˝‡Ÿ ‚¢ÅÿÊ v{ ‚ ww Ã∑§ ‹ÉÊÈ-©UûÊ⁄UËÿ ¬˝‡Ÿ „Ò¥U– ߟ∑§ ©UûÊ⁄U xÆ ‡ÊéºÙ¥ ‚
•Áœ∑§ Ÿ „UÙ¥–
Question Nos. 16 to 22 are short answer type ques-
tions. Their answer should not be more than 30 words.
x. ¬˝‡Ÿ ‚¢ÅÿÊ wx ‚ w} Ã∑§ ∑§ ¬˝‡ŸÙ¥ ∑§ ©UûÊ⁄U yÆ ‡ÊéºÙ¥ ‚ •Áœ∑§ Ÿ „UÙ¥–
Question No. 23 to 28 answers should not be more
than 40 words.
y. ¬˝‡Ÿ ‚¢ÅÿÊ w~ ‚ xv Ã∑§ ºËÉʸ-©UûÊ⁄UËÿ ¬˝‡Ÿ „Ò¥U– ߟ∑§ ©UûÊ⁄U |Æ ‡ÊéºÙ¥ ‚
•Áœ∑§ Ÿ „UÙ¥–
Question Nos. 29 to 31 are long answer type ques-
tions. Their answer should not be more than 70 words.

Class 10th 1 Science & Technology

z. ¬˝‡Ÿ ‚¢ÅÿÊ v ‚ vz Ã∑§ ∑§ ¬˝‡ŸÙ¥ ∑§ ©UûÊ⁄U ∑§Ê≈U ∑§⁄U Á‹πŸ ¬⁄U •¢∑§ Ÿ„UË¥
Áº∞ ¡Ê∞¢ª–
Marks will not be given to answer of question Nos. 1
to 15 if there is any cutting or over writing in an-
swers.
v. ⁄UÊ‚ÊÿÁŸ∑§ ‚◊Ë∑§⁄UáÊ ∑§Ù ‚¢ÃÈÁ‹Ã ∑§ËÁ¡∞ — v
Na + H 2 O → NaOH + H 2

Balance the chemical equation :
Na + H2 O → NaOH + H2

w. å‹ÊS≈U⁄U •ÊÚ»§ ¬Á⁄U‚ ∑§Ê ⁄UÊ‚ÊÿÁŸ∑§ ‚ÍòÊ Á‹Áπ∞– v
Write the chemical formula of plaster of paris.
x. ‚ÙÁ«Uÿ◊ ∑§Ê ¬⁄U◊ÊáÊÈ ∑˝§◊Ê¢∑§ Á‹Áπ∞– v
Write the atomic no. of sodium.
y. éÿÍ≈UŸ ∑§Ê ⁄UÊ‚ÊÿÁŸ∑§ ‚ÍòÊ fl ‚¢⁄UøŸÊà◊∑§ ‚ÍòÊ Á‹Áπ∞– v
Write the chemical formula and structural formula
of butane.
z. ATP ∑§Ê ¬Í⁄UÊ ŸÊ◊ Á‹Áπ∞– v
Write the full form of ATP.
{. ºÙ âÁòÊ∑§Ê ∑§ÙÁ‡Ê∑§Ê ∑§ ◊äÿ Á⁄UÄà SÕÊŸ ∑§Ù ÄÿÊ ∑§„UÃ „Ò¥U? v
What do we call the gap bewteen the two nurons ?
|. ÁfllÈà Áfl÷fl ∑§Ê ◊ʬŸ ∑§⁄UŸ ∑§Ë ÿÈÁÄà ∑§Ê ŸÊ◊ ’ÃÊß∞? v
Name the device to measure the electric potential.
}. ºÙ ¡ËflʇflË ß¸¢œŸÙ¥ ∑§ ŸÊ◊ ’ÃÊß∞? v
Name two fossil fuels.

Class 10th 2 Science & Technology

~. ÃËŸ ø⁄UáÊ ∑§Ë πÊl o΢π‹Ê ∑§Ê ©UºÊ„U⁄UáÊ ºËÁ¡∞– v
Give an example of food chain with three steps.
vÆ. •ÊŸÈflÊ¢Á‡Ê∑§ÃÊ ∑§ ¡Ÿ∑§ ∑§ıŸ Õ? v
Who was father of Hereditary ?
vv. ∑§ıŸ ‚Ê ¡Ëfl “◊È∑ȧ‹Ÿ” mÊ⁄UÊ ¡ŸŸ ∑§⁄UÃÊ „ÒU? v
Which oragnism reproduces via budding ?
vw. ÁŸ∑§≈U ºÎÁc≈U ºÙ· ∑§ ©U¬øÊ⁄U ◊¥ ∑§ıŸ ‚ ‹Ò¥‚ ∑§Ê ¬˝ÿÙª Á∑§ÿÊ ¡ÊÃÊ „ÒU?
v
Which lens is used to cure the near sighted ness or
Myopia ?
vx. ◊ÊŸfl ŸòÊ ∑§ Á∑§‚ ÷ʪ ¬⁄U ¬˝ÁÃÁ’¢’ ’ŸÃÊ „ÒU? v
The image of an object form on which part of human
eye ?
vy. •Ù¡ÙŸ ˇÊ⁄UáÊ ∑§Ê „U◊Ê⁄‘U ¡ËflŸ ◊¥ ÄÿÊ ºÈc¬˝÷Êfl „ÒU? v
What is the harmful effect of ozone depletion on our
life ?
vz. ª¢ªÊ ‚»§Ê߸ ÿÙ¡ŸÊ ∑§’ ¬˝Ê⁄Uê÷ ∑§Ë ªß¸ ? v
When was ‘Ganga Action Plan’ started ?
v{. •Ê‚Áflà ¡‹ ÁfllÈà ∑§Ê øÊ‹∑§ ÄÿÙ¥ Ÿ„UË¥ „UÙÃÊ ¡’Á∑§ fl·Ê¸ ¡‹ „UÙÃÊ
„ÒU– v
Why does distilled water no conduct electricity,
whereas rain water does ?
ÃÊ¡ ºÍœ ∑§ pH ∑§Ê ◊ÊŸ { „UÙÃÊ „ÒU– º„UË ’Ÿ ¡ÊŸ ¬⁄U ß‚∑§ pH ∑§ ◊ÊŸ
◊¥ ÄÿÊ ¬Á⁄UfløŸ „UÙªÊ? ÄÿÙ¥?
Class 10th 3 Science & Technology

Fresh milk has a pH of 6. How do you think the pH
will change as it turns into curd ? Why ? 2½
v|. Áøå‚ ∑§Ë ÕÒ‹Ë ◊¥ ∑§ıŸ ‚Ë ªÒ‚ ÷⁄UË ¡ÊÃË „ÒU?
Which gas is flushed in the chips bag and why ? 2½
v}. ‚ÙÁ«Uÿ◊ ∑§Ù ∑§⁄UÙÁ‚Ÿ ◊¥ «ÈU’Ù ∑§⁄U ÄÿÙ¥ ⁄UπÊ ¡ÊÃÊ „ÒU?
Why sodium is kept immerred in kerosen oil ? 2½
v~. ¬Êø∑§ ∞¢¡Êß◊Ù¥ ∑§Ê ÄÿÊ fláʸÿ „ÒU?
What is the function of digestive enzymes. 2½
¬⁄UʪáÊ Á∑˝§ÿÊ ÁŸ·øŸ ‚ Á∑§‚ ¬˝∑§Ê⁄U Á÷㟠„ÒU?
How is the process of pollination different from
fertilization.
wÆ. ÿıflŸÊ⁄¢U÷ ∑§ ‚◊ÿ ‹«∏UÁ∑§ÿÙ¥ ◊¥ ∑§ıŸ ‚ ¬Á⁄UfløŸ ÁºπÊ߸ ºÃ „Ò¥U?
What changes can be observed during the adolescence
among girls ? 2½
wv. ÁflÁ÷ãŸÃÊ•Ù¥ ∑§ ©Uà¬ãŸ „UÙŸ ‚ Á∑§‚Ë S¬Ë‡ÊË¡ ∑§Ê •ÁSÃàfl Á∑§‚ ¬˝∑§Ê⁄U
’…∏U ¡ÊÃÊ „ÒU?
How does the creation of variation in a species
promote survival. 2½
ww. •¢ÁÃ◊ ¬¢ÁÄà ◊¥ ’Ò∆U Á∑§‚Ë ÁfllÊÕ˸ ∑§Ù ‡ÿÊ◊¬„U ¬…∏UŸ ◊¥ ∑§Á∆UŸÊ߸ „UÙÃË
„ÒU– ÿ„U ÁfllÊÕ˸ Á∑§‚ ºÎÁc≈U∑§ÙáÊ ‚ ¬ËÁ«∏Uà „ÒU? ß‚ Á∑§‚ ¬˝∑§Ê⁄U ‚¢‡ÊÙÁœÃ
Á∑§ÿÊ ¡Ê ‚∑§ÃÊ „ÒU–
A student has ‘difficulty reading the blackboard while
sitting in the last row. What could be the defect the
child is suffering from ? How can it be corrected ?

Class 10th 4 Science & Technology

√ÿÊÅÿÊ ∑§ËÁ¡∞ Á∑§ ª˝„U ÄÿÙ¥ Ÿ„UË¥ Á≈U◊Á≈U◊ÊÃ?
Explain why the planents do not twinkle ? 2½
wx. •ÊœÈÁŸ∑§ •Êflø ‚Ê⁄UáÊË ∞fl◊˜ ◊¥«U‹Ë»§ ∑§Ë •Êflø ‚Ê⁄UáÊË ∑§Ë ÃÈ‹ŸÊ
∑§ËÁ¡∞–
What are the difference between Mendellev’s periodic
table and modern priodic table ? 4
wy. ‚ÍÿÙ¸ºÿ ∑§ ‚◊ÿ ‚Íÿ¸ ⁄UÄÃÊ÷ ÄÿÙ¥ ¬˝ÃËà „UÙÃÊ „ÒU?
Why the sky appears reddish at the sunrise ? 4
wz. ´§ÃÈdÊfl ÄÿÙ¥ „UÙÃÊ „ÒU?
Why does menstruation occur.
◊Ê° ∑§ ‡Ê⁄UË⁄U ◊¥ ª÷¸SÕ ÷˝ÍáÊ ∑§Ù ¬Ù·áÊ Á∑§‚ ¬˝∑§Ê⁄U ¬˝Êåà „UÙÃÊ „ÒU?
How does the embryo get noourshment inside the
mother’s body? 4
w{. ¬ÿʸfl⁄UáÊ Á◊òÊ ’ŸŸ ∑§ Á‹∞ •Ê¬ •¬ŸË •ÊºÃÙ¥ ◊¥ ∑§ıŸ-‚ ¬Á⁄UfløŸ ‹Ê
‚∑§Ã „Ò¥U?
What changes can you make in your habits to become
more environment friendy. 4
w|. ¬ÊÁ⁄UâòÊ ◊¥ •¬◊Ê¡¸∑§Ù¥ (•¬ÉÊ≈U∑§Ù¥) ∑§Ë ÄÿÊ ÷ÍÁ◊∑§Ê „ÒU?
What is the role of decomposers in the ecosystem ?4
w}. ◊ÊŸfl •Ê°π ∑§Ê ÁøÁã„Uà ÁøòÊ ’ŸÊß∞–
Make a labelled diagram of human eye. 4
w~. •ÊœÈÁŸ∑§ •Êflø ‚Ê⁄UáÊË mÊ⁄UÊ Á∑§‚ ¬˝∑§Ê⁄U ‚ ◊ã«U‹Ë»§ ∑§Ë •Êflø ‚Ê⁄UáÊË
∑§Ë ÁflÁflœ Áfl‚¢ªÁÃÿÙ¥ ∑§Ù ºÍ⁄U Á∑§ÿÊ ªÿÊ–
Class 10th 5 Science & Technology

How could the Modun Periodic table remove various
anomalies of Mendelevs Periodic Table ? 6
⁄UÊ‚ÊÿÁŸ∑§ ªÈáÊÙ¥ ∑§ •ÊœÊ⁄U ¬⁄U œÊÃÈ•Ù¥ •ı⁄U •œÊÃÈ•Ù¥ ◊¥ •ãÃ⁄U ∑§ËÁ¡∞–
Differentiate between metals and non-metals on the
basis of their chemical properties. 4
xÆ. ◊ÊŸfl ◊ÁSÃc∑§ ∑§Ê ÁøÁã„Uà ÁøòÊ ’ŸÊ∑§⁄U ÁflÁ÷㟠÷ʪ٥ ∑§Ë √ÿÊÅÿÊ
∑§ËÁ¡∞–
Make a well labelled diagram of humen brain and
explain its various parts.
flÎÄ∑§ÊáÊÈ (Nephron) ∑§Ë ⁄UøŸÊ ÃÕÊ Á∑˝§ÿÊÁflÁœ ∑§Ê fláʸŸ ∑§ËÁ¡∞–
Describe the structure and functioning of nephrons.
xv. ÁŸêŸÁ‹Áπà ∑§Ê ©UºÊ„U⁄UáÊ ‚Á„Uà fláʸŸ ∑§⁄‘¥U-
(∑§) ‚¢ˇÊÊ⁄UáÊ (π) Áfl∑Χê¢ÁœÃÊ
Explain the following with example :
(a) Corrosion (b) Rancidity
ÁfllÈà ¡ÁŸòÊ ∑§ Á‚hʢà ∑§Ë √ÿÊÅÿÊ ∑§ËÁ¡∞– ß‚∑§Ë ⁄UøŸÊ fl ∑§Êÿ¸ÁflÁœ
∑§Ê fláʸŸ ∑§ËÁ¡∞–
State and explain the principal of an electric
generator, its structure and working.
6

Class 10th 6 Science & Technology