Apex Institute: Head Office- 62, Nitikhand-III, Indirapuram, GZB |www.apexiit.org/ | Cont.- 9990495952, 9910817866 Apex Institute: Head Office- 62, Nitikhand-III, Indirapuram, GZB |www.apexiit.org/ | Cont.- 9990495952, 9910817866
5.
5. Question numberQuestion number 1 to 21 to 2 inin Section-ASection-A areare one markone mark
question. These are to be answered in
question. These are to be answered in one wordone wordor inor inoneone sentence
sentence.. 6.
6. Question numbersQuestion numbers 3 to 53 to 5 inin Section-ASection-A areare twotwo marks
marks questions. These are to be answered in aboutquestions. These are to be answered in about 3030 words
wordseach.each. 7.
7. Question numbersQuestion numbers 6 to 156 to 15 inin Section-ASection-A areare threethree marks
marks questions. These are to be answered in aboutquestions. These are to be answered in about 5050 words
wordseach.each. 8.
8. Question numbersQuestion numbers 16 to 2116 to 21 inin Section-ASection-A areare fivefive marks
marks questions. These are to be answered in aboutquestions. These are to be answered in about 7070 words
wordseach.each. 9.
9. Question numbersQuestion numbers 22 to 2722 to 27 inin Section-BSection-B areare questions based on practical skills and are
questions based on practical skills and are two markstwo marks
questions. questions.
SECTION-A
SECTION-A 1.
1. Where areWhere are Nis Nissl’ssl’s granules found and what is theirgranules found and what is their
nature? nature?
2.
2. What are those organisms called which bear both theWhat are those organisms called which bear both the
sex organs in the same individual. Give one example of sex organs in the same individual. Give one example of such
such organismorganism..
3.
3. Write the steps involved in generating electricity in aWrite the steps involved in generating electricity in a
nuclear reactor. nuclear reactor.
4.
4. (a) How are power and focal length of a lens(a) How are power and focal length of a lens
related? related?
(b) You are provided with two lenses of focal length 20 (b) You are provided with two lenses of focal length 20 cm and 40 cm respectively. What lens will you use to cm and 40 cm respectively. What lens will you use to obtain more convergent light?
obtain more convergent light?
5.
5. An elementAn element X X (atomic number 17) reacts with an(atomic number 17) reacts with an
element
elementYY (atomic number 20) to (atomic number 20) to form a form a divadivalent halide.lent halide. (a) What is the position
(a) What is the position of elementof element X Xandand YYin the periodicin the periodic table?
table?
(b) What changes in the colour of iron nails and copper (b) What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron sulphate solution do you observe after keeping the iron nails in copper sulphate for about half
nails in copper sulphate for about half an hour.an hour.
7.
7.You are provided with three test tubes A, B and CYou are provided with three test tubes A, B and C
which contain distilled water, acidic solution and basic which contain distilled water, acidic solution and basic solution respectively. If you are given blue litmus paper solution respectively. If you are given blue litmus paper only,
only, how will you idenhow will you identify the contents tify the contents of each of each test tube?test tube?
OR OR
Explain the action of dilute hydrochloric acid on the Explain the action of dilute hydrochloric acid on the following with chemical equations:
following with chemical equations:
(a) Magnesium ribbon (b) Sodium hydroxide (c) Crushed (a) Magnesium ribbon (b) Sodium hydroxide (c) Crushed egg shells
egg shells
8.
8.Give one example each of the following decompositionGive one example each of the following decomposition
reactions. Write on
reactions. Write one balance balanced cheed chemicamical l equation in eachequation in each case:
case:
(a) The reaction which occurs on passing electric current. (a) The reaction which occurs on passing electric current. (b) The reaction which occurs in the presence of sunlight. (b) The reaction which occurs in the presence of sunlight. (c) The reaction which occurs on heating of a substance. (c) The reaction which occurs on heating of a substance.
9.
9.A compound ‘X’A compound ‘X’ is a constituent of baking powder. Itis a constituent of baking powder. It
is
is used as used as an antacid. an antacid. WhenWhen ‘X’‘X’ is heated it gives out ais heated it gives out a gas ‘Y’
gas ‘Y’ which, when passed through lime water turns itwhich, when passed through lime water turns it milky
milky and and saltsalt ‘Z’‘Z’ is is formed formed which which is is the mthe mainain constituent of washing powder. Identify X, Y and Z. constituent of washing powder. Identify X, Y and Z. Write
Write the the balancbalanced ed chemchemical ical equations for the equations for the reactionsreactions involved.
involved.
OR OR
(a) A solution turns red litmus paper to blue. What can be (a) A solution turns red litmus paper to blue. What can be
Science Practice Paper 2018
Science Practice Paper 2018
Time
Time Allowed: Allowed: 3 3 hours hours Maximum Maximum Marks: Marks: 8080
CLASS - X
CLASS - X
pH of th
pH of this solution?is solution?
(b)10mL of sodium hydroxide solution is completely (b)10mL of sodium hydroxide solution is completely neutralized by 8 mL of solution of hydrochloride acid. If neutralized by 8 mL of solution of hydrochloride acid. If we take 20 mL of the same solution hydroxide, what will we take 20 mL of the same solution hydroxide, what will be the amount
be the amount of hydrochof hydrochloridloride acid solution required toe acid solution required to neutralized it?
neutralized it?
(c)What type of medicine is used for the treatment of (c)What type of medicine is used for the treatment of indigestion?
indigestion?
10.
10. StateState Ohm’sOhm’s law. Three resistors oflaw. Three resistors of 2Ω2Ω each areeach are
connected to a battery of 3 V
connected to a battery of 3 V as shown. as shown. Calculate Calculate thethe current drawn from the battery the battery and voltage current drawn from the battery the battery and voltage across the 2 Ω
across the 2 Ω resistor. resistor.
11.
11. (a) Mention effec(a) Mention effect t of electric current on whicof electric current on which theh the
working of an electrical fuse
working of an electrical fuse is is based.based. (b) Draw
(b) Draw a a schemaschematic tic labelabelled lled diagram of diagram of a a domesticdomestic circuit
circuit which which has a provishas a provision of a mion of a main ain fuse, mfuse, meter, oneeter, one light
light bulb and a sbulb and a socket.ocket.
OR OR
Why is pure iron not used for making permanent Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made magnets. Describe how permanent magnets are made electrically.
electrically.
12.
12. Draw a diagram of the front view of human heartDraw a diagram of the front view of human heart
and label any six parts including at least two, that are and label any six parts including at least two, that are concerned with arterial blood supply to the heart concerned with arterial blood supply to the heart muscles.
muscles.
OR OR
(a) How will you relate the
(a) How will you relate the Darwin’sDarwin’s theory to your day-theory to your day-to-day
to-day lifelife??
(b) How will you m
(b) How will you make yourake yourself fit self fit for a particufor a particular lar work?work?
14.
14. (a) (a) What are monohyWhat are monohybrid and dihybrid cross ?brid and dihybrid cross ?
(b) How Mendel proved that tallness is the dominant trait (b) How Mendel proved that tallness is the dominant trait and dwarfness is
and dwarfness is recessivrecessive e in in a pea pa pea plant ?lant ?
15.
15. Rohit wants to have an erect image of an object,Rohit wants to have an erect image of an object,
using
using a converging mia converging mirror of focal rror of focal length 40 length 40 cm.cm.
(a) Specify the range of distance where the object can be (a) Specify the range of distance where the object can be plac
placed ed in in front front of of the the mirmirror. ror. GivGive e reason reason for for youryour answer.
answer. (b) W
(b) Will the image be ill the image be bigger or smaller than thbigger or smaller than the object e object ?? (c)
(c) Draw a ray-diagram to show the image formation inDraw a ray-diagram to show the image formation in this case.
this case.
16.
16. Draw a schematic diagram of the various stepsDraw a schematic diagram of the various steps
involved in the extraction of metals from ores for metals involved in the extraction of metals from ores for metals of medium reactivity
of medium reactivity and for metals of and for metals of low reactivity.low reactivity.
17.
17. What is meant by reflex-action? With the help of aWhat is meant by reflex-action? With the help of a
labelled diagram trace the sequence of events which labelled diagram trace the sequence of events which occur when we touch a hot object.
occur when we touch a hot object.
18.
18. (a) Distinguish between saturated hydrocarbon and(a) Distinguish between saturated hydrocarbon and
unsaturated hydrocarbon with the help of combustion unsaturated hydrocarbon with the help of combustion process.
process.
(b) Write the chemical names of C
(b) Write the chemical names of C44HH1010 and Cand C22HH22 andand draw their structures.
draw their structures.
OR OR
Soaps and detergents are both types of salts. State the Soaps and detergents are both types of salts. State the difference between the two. Write the mechanism of the difference between the two. Write the mechanism of the cleansing action of soaps. Why do soaps not form lather cleansing action of soaps. Why do soaps not form lather
(b) A beam of light consisting of red, blue and yellow is (b) A beam of light consisting of red, blue and yellow is incident on the prisms as shown below. Complete the incident on the prisms as shown below. Complete the diagram to show refracted and emergent ray
diagram to show refracted and emergent ray
20.
20. (a) What is biodiversity? What will happen if(a) What is biodiversity? What will happen if
biod
biodiveriversity sity of of an an area area is is not not preservepreserved? d? Mention Mention oneone effect of it.
effect of it.
(b) Why we say energy flow in the biosphere is (b) Why we say energy flow in the biosphere is unidirectional?
unidirectional?
OR OR
(a) What is sustainable development? State its two main (a) What is sustainable development? State its two main objectives.
objectives.
(b) What is meant by
(b) What is meant by three types of ‘R’ (3three types of ‘R’ (3--R’s)R’s) to saveto save the environment? Explain with examples how would you the environment? Explain with examples how would you follow the
3-follow the 3-R’sR’s in your school to sin your school to save the ave the environmenvironment.ent.
21.
21. Aishwarya once visited her uncle's house.Aishwarya once visited her uncle's house.
Somehow she came to know about her uncle's illness and Somehow she came to know about her uncle's illness and also about the neglection of MRI (Magnetic resonance also about the neglection of MRI (Magnetic resonance imag
imaging) ing) due due to to its its high high cost. cost. She She then then not not onlyonly collected money from some of her family friends but also collected money from some of her family friends but also convince
convinced her uncd her uncle for le for the test The reports came the test The reports came afterafter the test helped the doctors to treat him well. After getting the test helped the doctors to treat him well. After getting well, uncle arranged the money and returned to her well, uncle arranged the money and returned to her saying thanks. Then her uncle did a brief research about saying thanks. Then her uncle did a brief research about the test and found that it was expensive because of its the test and found that it was expensive because of its set-up, that needs a strong magnetic fields and pulses of set-up, that needs a strong magnetic fields and pulses of radio wave energy.
radio wave energy.
(a) What were the values shown by Aishwarya and her (a) What were the values shown by Aishwarya and her uncle ?
uncle ?
SECTION-B
SECTION-B 22.
22. You have been provided with a fresh plucked leaf ofYou have been provided with a fresh plucked leaf of
Rheo or lily. What will you do to obtain the transparent Rheo or lily. What will you do to obtain the transparent leaf peel?
leaf peel?
23.
23. What are the factors on which the resistance of aWhat are the factors on which the resistance of a
conductor depends? conductor depends?
OR OR
While experimentally verifying Ohm’s Law a student While experimentally verifying Ohm’s Law a student observed that the pointer of the voltmeter coincide with observed that the pointer of the voltmeter coincide with 15th division when the voltmeter has a least count of 15th division when the voltmeter has a least count of 0.05 V. Find the observed reading of
0.05 V. Find the observed reading of voltmetevoltmeter.r.
24.
24. Write the names and molecular formula of twoWrite the names and molecular formula of two
organic
organic compounds compounds havinhaving functionag functional group l group suffixsuffixed ased as ‘– ‘– oic acid’. With
oic acid’. With the help of a balanced chemical equationthe help of a balanced chemical equation and explain what happens when any one of them reacts and explain what happens when any one of them reacts with
with sodium hydroxsodium hydroxide.ide.
25.
25. A student performed an experimA student performed an experiment ent for the imagefor the image
formation by a convex lens at different positions of an formation by a convex lens at different positions of an object. If focal length of lens is 15 cm.
object. If focal length of lens is 15 cm. Match the following :
Match the following :
Position
Position of of object object Position Position of of the the imageimage
(a) At 15 cm from (a) At 15 cm from convex lens
convex lens
(a) At 30 cm from convex lens (a) At 30 cm from convex lens
(b) At 30 cm from len
(b) At 30 cm from lens s (b) On the same (b) On the same side of an objecside of an objectt
(c) Beyond 30 cm of
Science Practice Paper 2018
Science Practice Paper 2018
Time
Time Allowed: Allowed: 3 3 hours hours Maximum Maximum Marks: Marks: 8080
CLASS - X
CLASS - X
26.
26. In an experiment to study the properties of AceticIn an experiment to study the properties of Acetic
acid, answer the follow
acid, answer the following questions ing questions ::
(a) Name the substance which on addition to acetic acid (a) Name the substance which on addition to acetic acid produces c
produces carbon dioarbon dioxidxide gas.e gas.
(b) How carbon dioxide gas is tested in the laboratory (b) How carbon dioxide gas is tested in the laboratory
27.
27. Correct the labelling of budding in yeast in the givenCorrect the labelling of budding in yeast in the given
diagram : diagram :
