320
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D
BC
A
Multiple Choice Questions
Experiment : Chapter - 2
I. To perform and observe the following reactions and classify them into;
(A) Combination Reaction
(B) Decomposition Reaction
(C) Displacement Reaction
(D) Double Displacement Reaction
i. Action of water on quick lime
ii. Action of heat on ferrous sulphate crystals
iii. Action of iron nails kept in copper sulphate solution
iv. Reaction between sodium sulphate and barium chloride solution
1. To observe the reaction of water on quicklime :
(a) quicklime is added to water in a test tube (b) a lot of water is added to quicklime
(c)
some water is sprinkled over quicklime
(d) none of these
2. When crystals of ferrous sulphate are strongly heated, the residue obtained is :
(a)
red in colour
(b) blue in colour
(c) green in colour
(d) colourless
3. When a solution of sodium sulphate is treated with a solution of barium chloride, the solution after
reaction contains mainly :
(a) barium sulphate (b) sodium chloride (c)both
(d)none
4. Reddish brown deposit obtained on iron nails when kept in a solution of copper sulphate in water is
that of :
(a)Cu2O
(b)CuO
(c)Cu
(d)CuS
5. When copper powder is strongly heated, a black substance is formed. Which is that substance?
(a)
copper oxide
(b)oxygen
(c)copper sulphate (d)copper chloride
6. What type of chemical reaction takes place when magnesium wire is burnt in air?
(a) decomposition reaction
(b) combination reaction
(c) displacement reaction (d)double displacement reaction
7. Fe2O3 + 2Al → Al2O3 + 2Fe. Name the type of reaction in this example.
(a) combination reaction
(b)decomposition reaction
(c)
displacement reaction
(d)double displacement reaction
8. What happens when dilute hydrochloric acid is added to iron filings?
(a)
hydrogen gas and iron chloride are produced
(b) chlorine gas and iron hydroxide are produced
(c) no reaction takes place
(d) iron salt and water are produced
9. You are given potassium chromate solution. In order to obtain an orange precipitate what should we
mix in it?
(a)
barium sulphate (b) barium chloride (c) barium sulphide (d) copper sulphate
10. What is added to zinc sulphate solution to obtain a white precipitate?
(a)
barium sulphide (b) barium sulphate (c) copper sulphide (d) iron sulphide
Experiment : I. To find the pH of :
(A) Dilute HCl
(B)
(C) Dilute acetic acid solution
(D)
(E) Water
(F) Chapter - 3
Dilute NaOH solution
Lemon juice
Dilute sodium bicarbonate solution by
using pH paper/universal indicator
Multiple Choice Questions
Science & Technology - S.S.C.
II.
321
To study the properties of acids and bases (HCl and NaOH) by their reaction with
(A) Litmus solution (Blue/Red)
(B) Zinc metal
(C) Solid sodium carbonate
1. Which of the following has pH = 7?
(a)
pure water
(b) H2SO4 solution in water
(d) HCl solution in water
(c)Na2CO3 solution in water
2. A student measured the pH values of four solutions marked A, B, C and D and found them to be 6,
12, 2 and 14 respectively. The solution which is likely to be strongly acidic is :
(a)A
(b)B
(c)C
(d)D
3. Which of the following solutions should be put on a universal indicator paper so that its colour may
change to green?
(a) milk
(b) common salt solution
(c) baking soda solution
(d) sodium hydroxide solution
4. A student placed a few drops of a liquid over a portion of the blue litmus paper. He observed that blue
litmus paper turned red. The liquid could be :
(a)
dilute hydrochloric acid
(b) water
(c) dilute sodium hydroxide
(d) dilute potassium hydroxide
5. A student placed a pinch of solid sodium hydrogen carbonate on a strip of red litmus paper. He found
that the colour of red litmus paper strip :
(a) turned green
(b) turned blue
(c) did not change
(d) turned yellow
6. What colour change takes place when phenolphthalein is added to NaOH solution?
(a)
pink
(b)orange
(c)yellow
(d)white
7. When H2SO4 acid is added to CuCl2 salt in a test tube, the gas evolved will turn blue litmus red.
Which gas is evolved?
(a)
HCl
(b) H2
(c)CO2
(d)O2
8. On adding universal indicator to common salt solution, what will be the colour of the solution?
(a) orange (b) algal green colour (c)red
(d)violet
9. Four solutions A, B, C and D have pH values of 6, 4, 3 and zero respectively. Which of the solution
is highly acidic?
(a)A
(b)B
(c)C
(d)D
► Hint : Lower the pH, the stronger the acid.
10. Which of the following element forms oxide which would indicate pH value less than seven?
(a)calcium
(b)magnesium
(c)carbon
(d)copper
► Hint : Carbon. It form acidic oxides.
Chapter - 4
Experiment :
I.
To study the dependence of current (I) on the potential difference (V) across a resistor and determine
its resistance.
II. To determine the equivalent resistance of two resistors when connected in series.
III. To determine the equivalent resistance of two resistors when connected in parallel.
1. When the resistance of the conductor increases then the current will :
(a)increase
(b)decrease
(c) remain same
(d) none of these
2. What will happen to current passing through a resistance, if potential difference across it is doubled
and the resistance is halved.
(a) remains unchanged(b) becomes double (c) becomes half
(d) becomes four times
3. In a voltmeter there are 20 divisions between the 0 mark and 0.5 V. The least count of voltmeter is :
(a) 0.020 volts
(b) 0.025 volts
(c) 0.050 volts (d) 0.250 volts
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4.
Keeping the potential difference constant the resistance of circuit is made four times. How much does
the current change?
(a) remains unchanged
(b) becomes four times
(c)
becomes one fourth (d) becomes half
5. What is the equivalent resistance of three resistances of 2 ohms, 3 ohms and 4 ohms connected in
series?
1
(b) 1 W(c)
(d) 9 W
(a)6
W 9 W 6. You are given three equal resistances, in how many combinations can they be arranged?
(a)three
(b)four
(c) five
(d) two
7. A resistor of 2 W is connected to a cell when magnitude of current is 1A, if another resistor of 2 W is
connected in series with the first one, then magnitude of current will be :
(a) 1A
(b) more than 1A
(c) less then 1A
(d)zero
8. Which symbol is used to represent electric cell in a circuit diagram?
(a)
+ –
+
– (c)
(b)
(d)
9.
How would the three resistance of 3 W each be connected so as to produce an equivalent resistance
of 1 W ?
(a)
all in parallel
(b) all in series
(c) two in parallel and other in series
(d) two in series and the other in parallel
10. Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does
the current change?
(a)double
(b) 1 th
(c) half
(d) remains same
4
►
V
as the current is inversely proportional to resistance, if the resistance is doubled
Hint : I =
R
the current will get halved.
Experiment : Chapter - 6
I. To determine the focal length of (A) Concave mirror (B) Convex lens by obtaining image of a distinct object
1. An object of 10 cm height is placed in front of a plane mirror. The height of the image will be :
(a) 5 cm
(b) 10 cm (c) 15 cm (d) 20 cm
2. A student obtained a sharp image of grill of a window on a screen using a convex lens. For better
results the teacher suggested focusing on a distant tree instead of grill. In which direction should the
lens be moved to get the sharp image of tree?
(a) away from screen
(b) behind the screen
(c)
towards the screen
(d) far away from screen
3. What happens to the image of your face as you take a concave mirror away from your face slowly?
(a) becomes smaller (b) becomes bigger (c) remains the same (d) disappears
4. When the object is far away from a concave mirror, the image is formed :
(a) between focus and centre of curvature
(b) at focus
(c) at centre of curvature
(d) beyond centre of curvature
5. A concave mirror forms enlarged virtual image for the position of the object :
(a) between infinity and centre of curvature
(b) between focus and centre of curvature
(c) at the principle focus
(d) between pole and principal focus
6. To get the image at the centre of curvature of a concave mirror, the object must be placed :
(a) between infinity and centre of curvature
(b) at infinity
(c) at principal focus (d) at the centre of curvature
Multiple Choice Questions
Science & Technology - S.S.C.
7.
8.
323
A point sized image is obtained by a convex lens when the object is :
(a) between F1 and 2F1 (b) at 2F1
(c) beyond 2F1(d)
at infinity
The focus of a concave mirror lies :
(a) on the both sides of the mirror (b) in front of the mirror
(c) at the back of the mirror (d) on the right side of the mirror
Experiment : Chapter - 7
I. To trace the path of a ray of light passing through a rectangular glass slab for different angles of incidence.
Measure the angle of incidence, angle of refraction, angle of emergence and interpret the results.
1. A student performs the experiment on tracing the path of ray of light passing through a rectangular
glass slab for different angles of incidence. He/she measures angle of refraction and angle of
emergence for all observations. He/she finds that in all cases:
(a)
angle of incidence is more than angle of refraction but nearly equal to angle of emergence.
(b) angle of incidence is less than angle of refraction but nearly equal to angle of emergence.
(c) angle of incidence is more than angle of emergence but nearly equal to angle of refraction.
(d) angle of incidence is less than angle of emergence but nearly equal to angle of refraction.
2. When a ray of light travels from air to glass and strikes the surface of separation at 90° then it :
(a) bends towards normal
(b) bends away from normal
(c)
passes unbent
(d) returns to air
3. When a ray of light is incident from a denser medium of refractive index 2, it goes in a straight line.
What should be the angle of incidence?
(a)
just less than 30° (b) just less than 40° (c) just less than 60° (d) just less than 90°
4. A ray of light strikes the glass slab at an angle of 50°, What is the angle of incidence?
(a)
50° (b)40°
(c)140°
(d)none of these
5. A glass slab is placed in the path of convergent light. The point of convergence of light :
(a) moves towards the slab
(b) moves away from slab
(c) remains at the same point
(d) undergoes lateral shift
6. Water in a swimming pool appears shallower than its depth due to :
(a) reflection of light
(b) refraction of light
(c) scattering of light
(d) dispersion of light
7. The apparent depth of an object placed in a denser medium and seen through a rarer medium is :
(a) greater than the real depth
(b) less than the real depth
(c) equal to the real depth
(d) double than the real depth
8. When a light ray passes from a rarer medium to a denser medium :
(a)
∠ i > ∠ r(b)
∠ i < ∠ r(c)
∠ i = ∠ r(d)
∠i ≤∠r
9. A ray of light incident normal to the interface travels :
(a) away from normal (b) backward
(c) towards normal (d)undeviated
10. Light enters from air to glass having refractive index 1.50. What is the speed of light in glass?
(a) 3 × 108 m/s
(b) 1.5 × 108 m/s
(c) 1.2 × 108 m/s
(d) 2 × 108 m/s
Experiment : Chapter - 8
I. To observe the action of Zn, Fe, Cu and Al metals on the following salt.
(A) ZnSO4
(B)FeSO4
(C)CuSO4 (D) Al2(SO4)3
1. To show that zinc is more reactive than copper, the correct procedure is to :
(a)
prepare CuSO4 solution and dip zinc strip in it (b) prepare ZnSO4 solution and dip copper in it
(c) heat zinc and copper strips
(d) add dil. nitric acid on both the strips
2. A solution of Al2(SO4)3 in water is not clear. It is due to :
(a) impurities present in the salt
(b) hydrolysis of Al2(SO4)3 in water
(c) impurities present in water
(d) none of these
Multiple Choice Questions
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3. 4. 5. 6. 7.
8. A solution of Al2(SO4)3 in water is
(a)blue
(b)pink
(c)green
(d)colourless
Which of the following solutions in water is green in colour?
(a)CuSO4(b)
FeSO4
(c) ZnSO4
(d)Al2(SO4)3
Reaction of potassium with cold water evolves :
(a)CO2 gas
(b) O2 gas
(c) H2 gas
(d)N2 gas
Which of the following metals react with dil. HNO3 to evolve H2 gas?
(a) Fe
(b) Mg
(c)Cu
(d)Al
Copper objects on contact with moist get a green coat of :
(a)CO2
(b) CuCO3
(c) ZnCO3
(d)CaCO3
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but XO2
turns litmus solution red. Therefore, the element X can be :
(a)iron
(b)magnesium
(c)lithium
(d)carbon
► Hint : It forms acidic oxide (oxides of non-metals are acidic).
9. You are given a clean copper wire and an iron nail. Put copper wire in a solution of MgCl2 and iron
nail in the solution of copper sulphate. Which of the following is a correct statement based on the
above activity?
(a)
there is no change in copper wire
(b) there is no change in iron nail
(c) the copper wire will turn reddish brown
(d) the iron nail will get dissolved in the solution
► Hint : Copper is less reactive than Mg. Therefore, copper will not displace Mg from MgCl2 solution.
10. Element X reacts with element Y to form a compound Z. During the formation of compound Z,
atoms of X lose one electron each whereas atoms of Y gain one electron each. Which of the following
property is not shown by compound Z?
(a) soluble in water
(b) low melting and boiling point
(c) occurrences as solid
(d) conduction of electricity in molten state
► Hint : Compound Z is an ionic compound.
Experiment : Chapter - 9
I. To study the properties of acetic acid (ethanoic acid) :
(A) odour (B) solubility in water
(C) effect on litmus (D) reaction with sodium bicarbonate
1. Some acetic acid is treated with solid NaHCO3. The resulting solution will be :
(a)
colourless
(b)blue
(c)green
(d)yellow
2. Ethanoic acid :
(a) is odourless
(b) has a pungent smell
(c) has smell of rotten eggs
(d) has a smell of lemon
3. Acetic acid :
(a)
turns blue litmus red
(b) is insoluble in water
(c) is pale yellow in colour
(d) all of these
4. Sodium bicarbonate solution is added to dilute ethanoic acid. It is observed that :
(a)
a gas is evolved
(b) a solid settles at the bottom
(c) the mixture becomes warm
(d) the colour of the mixture becomes yellow
5. 2 ml of ethanoic acid was taken in each of the three test tubes A, B, C and 2 ml, 4 ml, and
8 ml water was added respectively to them. A clear solution is obtained in :
(a) test tube A
(b) test tube B
(c) test tube A and B (d) all the test tubes
6. When acetic acid reacts with zinc metal, the gas given out is :
(a)
H2
(b)O2
(c)CO2
(d)SO2
7. When acetic acid reacts with ethyl alcohol in presence of anhydrous ZnCl2, the product formed is :
(a)
ester
(b) sodium ethoxide (c) ethanoic acid
(d) methyl alcohol
Multiple Choice Questions
325
Science & Technology - S.S.C.
8. What is ethanoic acid which solidifies below 290K known as ?
(a) ice
(b) solid acetic acid (c) glacial acetic acid (d) ethyl acetate
9. Which of the following is not a property of ethanoic acid?
(a) it is a colourless acid
(b) it has a pungent smell
(c)
it is a strong acid
(d) all of these
10. Freezing point of ethanol is :
(a)114ºC
(b)78ºC
(c)100ºC
(d)–114ºC
Chapter - 10
Experiment : I.
To prepare a temporary mount of a leaf peel to show stomata.
1. To observe stomata in dicot leaf we must prepare a slide by taking :
(a) a crushed leaf
(b) upper epidermis of leaf
(c)
a lower epidermis of leaf
(d) a central part of leaf
2. When a student observed a stomata epidermal peel of a leaf under microscope, it appeared pinkish
red in colour. The stain used was :
(a)iodine
(b)acetocarmine
(c)safranin
(d)eosin
3. While preparing a temporary stained mount of leaf epidermal peel, the extra stain is removed by :
(a) washing with water
(b) washing with calcium chloride
(c)
soaking with filter paper
(d) absorbing with cotton wool
4. Rekha was shown slides of leaves. She can distinguish monocot and dicot leaf on the basis of :
(a)
shape of stomata
(b) thickness of epidermis
(c) size of cells (d) position of stomata
5. Generally more stomata are found in the :
(a) upper leaf surface
(b) lower leaf surface
(c) waxy cuticle (d) mesophyll tissue
6. Which of the following is the function of guard cells?
(a)transportation
(b)photosynthesis
(c) protection against mechanical injury (d) control the opening and closing of stomata
7. In order to exchange gases with the atmosphere, epidermis of a leaf has minute openings called :
(a)lenticels
(b)guard cells
(c)cambium
(d)stomata
8. The main gas that diffuses into and out of the leaf at night is respectively:
(a) CO2 and O2(b)
O2 and CO2
(c)N2 and CO
(d) H2 and N2
9. Loss of water through stomata in the form of water vapour is called :
(a)evaporation
(b)transportation
(c)transpiration
(d)condensation
Experiment :
II. To show experimentally that light is necessary for photosynthesis.
1. Leaf is boiled in alcohol and kept in water bath because :
(a) alcohol is bad for leaf
(b) alcohol is volatile
(c)
alcohol catches fireon heating directly (d) alcohol leaves fumes
2. Which of the following is not essential for photosynthesis?
(a)
oxygen
(b)carbon dioxide (c)light
(d)chlorophyll
3. In an experiment to test the presence of starch in leaf, the leaf is boiled in alcohol for a few minutes
using a water bath. This is an essential step in the experiment because alcohol:
(a) softens the leaf
(b) disallows the iodine to enter the leaf
(c) allows iodine to enter the leaf (d) dissolves chlorophyll
Multiple Choice Questions
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4.
A portion of each of four destarched leaves of a plant was covered with paper strips of various kinds.
The plant was exposed to sunlight for five hours. Thereafter, the strips were removed and the leaves
tested for starch in the covered portion. Which one out of the four leaves gave the starch test in the
covered portion?
(a) covered with black paper strip
(b) covered with green paper strip
(c) covered with white paper strip
(d) covered with transparent paper strip
5. Ankita bought glucose powder. She felt it was adulterated with starch powder. How should she test it?
(a) by sieving
(b) by dissolving in water
(c)
by iodine test (d) all of these
6. Which of the following chemical is used to conduct starch test on leaves?
(a)alcohol
(b)iodine
(c)boiled water
(d)potassium hydroxide
7. Raw materials of photosynthesis are :
(b) sunlight and chlorophyll
(a)
CO2 and H2O
(c)O2 and H2O
(d)CO2 and O2
8. Which of the following processes does not occur during photosynthesis?
(a) chloroplasts absorb radiant energy from sunlight
(b) water molecule is split into hydrogen and oxygen
(c) carbon dioxide is reduced to carbohydrate
(d)
oxidation of carbon to carbon dioxide
Experiment :
III. To show experimentally that carbon dioxide is given out during respiration.
1.
2.
Arrange the steps in correct order to demonstrate that CO2 is produced during respiration.
i. Soak gram seeds overnight and place in a conical flask.
ii. Fit a cork and a U tube on the conical flask.
iii. Suspend a test tube containing KOH.
iv. Keep the set up undisturbed.
(a) i – ii – iii – iv
(b) i – ii – iv – iii
(c) i – iii – ii – iv
(d) i – iii – iv – ii
Mohan prepared lime water and used it next month to show that CO2 is produced during respiration.
What will be his observation?
i. White precipitate will be formed
ii. White precipitate will not be formed
iii. Lime water should be fresh
iv. Lime water should be used any time
(a) [ii] is correct (b) [ii and iii] are correct
(c) [i and iv] are correct
(d) [ii and iv] are correct
3. Before setting up an experiment to show that seeds release CO2 during respiration, the seeds should be:
(a) dried completely (b) boiled to make them soft
(c) soaked in vinegar
(d) kept moist till they germinate
4. Why is some KOH placed in a small test tube in the flask with germinating seeds in the experiment
to demonstrate occurrence of respiration in germinating seeds?
(a) to provide oxygen required by the seeds for respiration
(b)
to absorb CO2 and create partial vacuum in the flask
(c) to absorb water from the seeds to make them dry
(d) to make the air present in the flask alkaline
5. Cellular respiration takes place in:
(a) plastids (b) mitochondria
(c)lysosomes
(d)ribosomes
6. Which of the following gas is given out during respiration?
(a) oxygen (b) carbon dioxide (c)nitrogen
(d)hydrogen
Multiple Choice Questions
Science & Technology - S.S.C.
327
Experiment :
IV. To determine the percentage of water absorbed by raisins. (Refer IX std. T.B - page no. 43)
1. Percentage of water absorbed is calculated dividing .................... by initial weight.
(a) final weight
(b) increased weight
(c) decreased weight
(d) none of these
2. A student dissolved 1 gm of sugar in 10 ml distilled water in beaker A. He dissolved 10 gm of sugar
in 100 ml of water in beaker B. Then he dropped few raisins in each beaker. After two hours he found
raisins :
(a) swollen in A and shrunken in B
(b) shrunken in A and swollen in B
(c) swollen in both
(d) shrunken in both
3. Twenty dry raisins were soaked in 50 ml of water and kept for 1 hour at 50ºC.
Which out of the following is the correct observation?
(a) 8 raisins absorbed water and 12 didn't
(b) 10 raisins absorbed water and 10 didn't
(c) 15 raisins absorbed water and 5 didn't
(d) All 20 raisins absorbed water
4. The following data was obtained on performing an experiment of determining the percentage of
water absorbed by raisins.
i. mass of water - 5 gms
ii. mass of dry raisins - 20 gms
iii. mass of soaked raisins - 30 gms
iv. mass of remaining water - 40 gms
The percentage of water absorbed by raisins will be :
(a) 10% (b) 25%
(c) 50% (d) 45%
5. A student soaked 5 gms of raisins in beaker A containing 25 ml of ice cold water and another 5 gms
of raisins in beaker B containing 25 ml of tap water at room temperature. After one hour the student
observed that :
(a) the water absorbed by raisins in beaker A is more than the water absorbed by raisins in beaker B
(b)
the water absorbed by raisins in beaker B is more than the water absorbed by raisins in beaker A
(c) a amount of water absorbed in both beakers is same
(d) no water was absorbed in any beaker
6. Dry raisins swell up when placed in water due to :
(a) diffusion (b) imbibition
(c) transpiration (d) endocytosis
Experiment : Chapter - 12
I. To study (A) binary fission in amoeba and (B) budding in yeast with the help of prepared slides.
1. To observe Amoeba and Paramoecium in a drop of water under microscope, the drop was taken on
slide. The stain that will clearly show both of them is :
(a)
methylene blue (b)iodine
(c)safranin
(d)eosin
2. Ramesh observed a slide of amoeba with elongated nuclei. It would represent :
(a)
binary fission
(b) multiple fission
(c) budding
(d) none of these
3. Which of the following organisms doesn't reproduce by binary fission?
(a)amoeba
(b)paramoecium
(c)yeast
(d)euglena
4. The multicellular organism which reproduces by budding is :
(a)
hydra
(b)yeast
(c)spirogyra
(d)mould
5. In binary fission :
(a) cytoplasmic division is followed by nuclear division
(b) nucleus divides into many nuclei
(c)
nuclear division is followed by cytoplasmic division
(d) cyst bursts to release daughter cells
Multiple Choice Questions