PRACTICE SET
SUBJECT- GENERAL SCIENCE CLASS-X
SECTION-A (25 MARKS)
Q) Choose the correct answer:-
1) ZnO + C → Zn + CO is an example of
(i) Combination Reaction.
(ii) Double Displacement Reaction.
(iii) Redox Reaction.
(iv) Decomposition Reaction.
2) The breakdown of pyruvate to give Carbon di Oxide, water and energy takes place in
(i) Cytoplasm.
(ii) Mitochondria.
(iii) Chloroplast.
(iv) Nucleus.
3) No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
(i) Plane.
(ii) Concave.
(iii) Convex.
(iv) Either Plane or Convex.
4) Fe2O3 + 2Al → Al2O3 + 2Fe is an example of
(i) Combination Reaction.
(ii) Decomposition Reaction.
(iii) Displacement Reaction.
(iv) Double Displacement Reaction.
5) A solution turns red litmus blue. The pH of the solution is
(i) 1
(ii) 4
(iii) 5
(iv) 10
6) In the periodic table of the elements, in a period from left to right atomic radius gradually
(i) Increases
(ii) Decreases
(iii) Remains same
(iv) None of these
7) The part of the brain which is responsible for maintaining equilibrium & posture of the body is
(i) Cerebellum
(ii) Medulla
(iii) Pons
(iv) Cerebrum
8) The organs having different origin, similar appearance and similar function are called
(i) Homologous
(ii) Analogous
(iii) Adjacent
(iv) Vestigial
9) A person cannot see distinctly objects kept beyond 2m. This defect can be corrected by using a lens of power
(i) -0.2D
(ii) +0.2D
(iii) -0.5D
(iv) +0.5D
10) Which of the following is not a conventional source of energy?
(i) Fossil Fuels
(ii) Bio-Mass
(iii) Nuclear Energy
(iv) Wind Energy
11) What happens when dilute HCl is added to iron filings?
(i) Iron salt & water are produced
(ii) No reaction takes place
(iii) Chlorine gas & iron hydroxide are produced
(iv) Hydrogen gas & iron chloride are produced
12) The reaction of lime with water is a
(i) Decomposition reaction
(ii) Displacement reaction
(iii) Double displacement reaction
(iv) Combination reaction
13) Which of the following metals can replace copper from a solution of copper sulphate?
(i) Silver
(ii) Gold
(iii) Zinc
(iv) Mercury
14) A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains
(i) NaCl
(ii) HCl
(iii) LiCl
(iv) KCl
15) Which one of the following types of medicines is used for treating indigestion?
(i) Antibiotic
(ii) Analgestic
(iii) Antacid
(iv) Antiseptic
16) The acid found in curd is
(i) Oxalic acid
(ii) Tartaric acid
(iii) Lactic acid
(iv) Citric acid
17) The taste of soap solution is bitter in taste because soap solution is a
(i) Alkaline
(ii) Acidic
(iii) Both (i) & (ii)
(iv) None of these
18) According to Mendeleev’s Periodic Law, the elements were arranged in the periodic table in the order of
(i) Increasing atomic masses
(ii) Decreasing atomic masses
(iii) Increasing atomic number
(iv) Decreasing atomic number
19) An element which is an essential constituent of all organic compounds belongs to
(i) Group 1
(ii) Group 16
(iii) Group 14
(iv) Group 15
20) Which of the following element would lose an electron easily?
(i) Mg
(ii) Na
(iii) K
(iv) Ca
21) Which of the following element does not lose an electron easily?
(i) Na
(ii) Al
(iii) F
(iv) Mg
22) Emulsification of fat molecule is carried out by
(i) Trypsin
(ii) Pepsin
(iii) Bile salts
(iv) Amylase
23) Anaerobic respiration occurs in
(i) Mitochondria
(ii) Chloroplast
(iii) Nucleus
(iv) Cytoplasm
24) The enzyme which converts starch into simple sugar is
(i) Amylase
(ii) Lipase
(iii) Pepsin
(iv) Trypsin
25) The name of the process with the help of which carbon & energy requirements of an autotrophic organism are fulfilled, is
(i) Photosynthesis
(ii) Transpiration
(iii) Translocation
(iv) Photophosphorylation
26) Largest cell of the body
(i) Muscle Cell
(ii) Blood Cell
(iii) Nerve Cell
(iv) Epithelial Cell
27) The intermediate space between two adjacent cells is called
(i) Synapse
(ii) Axon
(iii) Dendrite
(iv) Cellular Space
28) The number of cranial nerves in mammals is
(i) 12 pairs
(ii) 24 pairs
(iii) 36 pairs
(iv) 48 pairs
29) The number of spinal nerves in mammals is
(i) 32 pairs
(ii) 31 pairs
(iii) 21 pairs
(iv) 20 pairs
30) Which of the following is the genetic materials of organisms?
(i) DNA
(ii) Protein
(iii) Carbohydrate
(iv) Chromosome
31) Exchange of genetic material takes place in
(i) Sexual Reproduction
(ii) Budding
(iii) Asexual Reproduction
(iv) Vegetative Propagation
32) The maleness of a child is determined by
(i) Sex is determined by chance
(ii) The cytoplasm of green cell which determines the sex
(iii) The X chromosome in zygote
(iv) The Y chromosome in zygote
33) A trait in an organism is influenced by
(i) Maternal DNA
(ii) Paternal DNA
(iii) Both of these
(iv) None of these
34) Velocity of light is maximum in
(i) Air
(ii) Vacuum
(iii) Water
(iv) None of these
35) The real inverted & equal to the object image is produced if the object is placed before concave mirror
(i) At C
(ii) At F
(iii) Between F & C
(iv) Between F & P
36) An image is formed by a concave lens. The image is
(i) Real & Diminished
(ii) Virtual & Diminished
(iii) Real & Magnified
(iv) Virtual & Magnified
37) If an object is placed between the reflecting surfaces of two plane mirrors joined at an angle 90°, the number of images formed is
(i) Two
(ii) Three
(iii) Four
(iv) Numerous
38) The least distance of distinct vision for a young adult with normal vision is about
(i) 25 m
(ii) 25 cm
(iii) 2.5 cm
(iv) 2.5 m
39) The change of focal length of an eye lens is caused by the action of the
(i) Pupil
(ii) Retina
(iii) Ciliary Muscles
(iv) Iris
40) When light rays enter the eye, most of the refraction occurs at the
(i) Iris
(ii) Pupil
(iii) Outer surface of the Cornea
(iv) Crystalline lens
41) Human eye is more or less like a
(i) Microscope
(ii) Telescope
(iii) Photographic Camera
(iv) None of these
42) Which of the following is not derived from energy of the Sun?
(i) Biomass
(ii) Nuclear Energy
(iii) Geothermal Energy
(iv) Wind Energy
43) Which of the following is not an example of a bio-mass energy source?
(i) Wood
(ii) Nuclear Energy
(iii) Gobar Gas
(iv) Coal
44) The product of petroleum which have greatest demand is
(i) Kerosene
(ii) Gasoline
(iii) Diesel
(iv) Fuel Oil
45) The amount of carbon present in Anthracite Coal is
(i) 65%
(ii) 78%
(iii) 95%
(iv) 99%
46) Which of the following mirror is used as rear view of cars?
(i) Plane mirror
(ii) Convex mirror
(iii) Concave mirror
(iv) None of these
47) The wavelength of yellow light of sodium bulb is
(i) 0.59 m
(ii) 59 m
(iii) 5.9 m
(iv) 0.059 m
48) If an image is formed at focus of a concave mirror, then the image will be
(i) Real & Inverted
(ii) Virtual & Erect
(iii) Real & Erect
(iv) Virtual & Inverted
49) Which of the following disaccharide is found in milk?
(i) Lactose
(ii) Maltose
(iii) Sucrose
(iv) None of these
50) Which of the following helps in the formation of Chlorophyll?
(i) Sodium
(ii) Magnesium
(iii) Calcium
(iv) None of these
SECTION-B (PROJECT 25 MARKS)
Draw any three ray diagrams using Concave mirror & any three diagrams using Convex lens. Also answer the following questions:-
(i) What is Principal Axis?
(ii) What is the “Pole” of the mirror?
(iii) What is the “Optical Centre” of the lens?
(iv) What is Aperture?
(v) What is Focal Length?
(vi) State the Laws of Reflection.
(vii) State the Laws of Refraction.
(viii) What is Refractive Index & how it is denoted?
(ix) What is Absolute Refractive Index?
(x) What is Rarer & Denser medium?
(xi) Why Concave Lens forms a Virtual image?
(xii) Write the Mirror formula & Lens formula.
(xiii) What are the Centre & Radius of Curvature?
(xiv) How many types of lenses are there?
(xv) Differentiate between Reflection & Refraction.
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