10th Public Exam March 2019 Important Creative One Mark Test

10th Standard

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Science

Time : 00:30:00 Hrs
Total Marks : 40
    40 x 1 = 40
  1. __________is an alternate expression of same gene.

    (a)

    Allelle

    (b)

    Variation

    (c)

    Speciation

    (d)

    Gene

    (e)

    Allelomorph

  2. ________worked out the first scientific experiment study on heredity.

    (a)

    lan Wilmut

    (b)

    Gregor Johan Mendel

    (c)

    Charles Drawin

    (d)

    Lamarck

  3. ----- may be defined as a gradual development of more complex species from pre-existing simpler forms.

    (a)

    Evolution

    (b)

    Theory of natural selection

  4. The men like Hominids who walked into Eastern Africa were measured to be ____________

    (a)

    Taller than four feet

    (b)

    Not taller than four feet

    (c)

    Three feet

    (d)

    Measured in inches

  5. The theory of Use and Disuse was prosed by ___________

    (a)

    Lamarck

    (b)

    Mendel

    (c)

    Darwin

    (d)

    Jenner

  6. Nitrogen fixation (Nif-genes) will help the cultivator to ___________

    (a)

    increase productivity

    (b)

    decrease productivity

    (c)

    store nitrogen

    (d)

    release nitrogen

  7. The viral disease is

    (a)

    Rabies

    (b)

    Cholera

    (c)

    Malaria

    (d)

    Typhoid

  8. What is the symptom of the disease sterility due to deficiency of vitamin E?

    (a)

    Defective calcification of bones

    (b)

    Inabilityto reproduce

    (c)

    Nervous disorder

  9. In which stage division takes place at right angles to the position of the nuclei resulting in the formation of four gametes.

    (a)

    Diplotene

    (b)

    Diakinesis,

    (c)

    Pachytene

    (d)

    Cytokinesis

  10. In which way of balsm plant dispersed its seeds?

    (a)

    anemochory

    (b)

    autochory

    (c)

    hydrochory

  11. All the flowers of whole_______and gives a single fruit.

    (a)

    epicarp

    (b)

    mesocarp

    (c)

    pericarp

    (d)

    inflorescence

  12. In Malpighian capsule a double-walled cup called _______

    (a)

    glomerulus

    (b)

    calyx

    (c)

    cortex

    (d)

    bowman's capsule

  13. ________ is found In the right a uriculo-ventricular aperture.

    (a)

    Atrium

    (b)

    Mitral valve

    (c)

    Tricuspid valve

  14. Sweat glands of skin, kidneys, lungs and blood work as a team to ensure _________

    (a)

    Temperature regulation

    (b)

     body condition  

    (c)

    blood regulation  

    (d)

     regulation of fluid

  15. Glycolysis comes to an end by the formation of______

    (a)

    acetic acid

    (b)

    pyruvic acid

    (c)

    uric acid

    (d)

    carbon di oxide

  16. _________ are otherwise called bio-catalysts

    (a)

    molecule

    (b)

    hormone

    (c)

    enzymes

    (d)

    leucocyte

  17. The respiratory organ of a fish is _______

    (a)

    gills

    (b)

    lungs

    (c)

    skin

    (d)

    nostrills

  18. In paper ________ recovery can be repulped and reprocessed into recycled paper, cardboard and other products.

    (a)

    42%

    (b)

    54%

    (c)

    60%

    (d)

    64%

  19. The concept of green chemistry was introduced in ________

    (a)

    1994

    (b)

    1996

    (c)

    1995

    (d)

    1999

  20. Substances that are broken down by biological process are called_____

    (a)

    Bio-degradable wastes

    (b)

    Non bio-degradable wastes

    (c)

    Medical wastes

  21. The largest wind energy farm in Tamilnadu generates________ of electricity

    (a)

    380 MW

    (b)

    300 MW

    (c)

    350 MW

  22. _________ of fresh water is in water resources.

    (a)

    2.4%

    (b)

    2.6%

    (c)

    3.4%

    (d)

    3.6%

  23. In wind mills wind energy converted into electrical current by______

    (a)

    Electrical generator

    (b)

    Galvanometer

    (c)

    Dynamo

    (d)

    Resistor

  24. The size of particles in true solution is

    (a)

    \(10\ \overset { \circ }{ A } \ to\ 1000A\)

    (b)

    \(1\overset { \circ }{ A } \quad to\quad 10\overset { \circ }{ A } \)

    (c)

    \(more\ than\ 1000\ \overset { \circ }{ A } \)

    (d)

    \(less\ than\ 1000\ \overset { \circ }{ A } \)

  25. The solubility of sodium nitrate is ______

    (a)

    20g

    (b)

    36g

    (c)

    92g

    (d)

    100g

  26. _________ is a solution in which more of the solute can be dissolved.

    (a)

    Super saturated solution

    (b)

    Colloidal solution

    (c)

    Saturated solution

    (d)

    Unsaturated solution

  27. ________ is used to determine the atomicity of gases.

    (a)

    Avogadro's law

    (b)

    Dalton's law

    (c)

    Gay lussac's law

    (d)

    Flemming's law

  28. Example for Isotope is

    (a)

    (17C35,17Cl37)

    (b)

    (18Ar40,20Ca40)

    (c)

    (6C13,7N14)

    (d)

    (8O16,7N14)

  29. An example for mono atomic molecule is

    (a)

    helium

    (b)

    hydrogen

    (c)

    ozone

    (d)

    sulpher

  30. When glucose is kept on our tongue, a cooling effect is felt in the result of____reaction.

    (a)

    endothermic

    (b)

    exothermic

    (c)

    oxidation

    (d)

    reduction

  31. ________ turns blue litmus paper red.

    (a)

    Washing soda

    (b)

    Acid

    (c)

    Base

  32. Na2SO4 + BaCI2 ⟶ BaSO4↓ + 2NaCI, CuSO4 +H2S ⟶ H2SO4 The reaction is belongs to

    (a)

    Displacement reaction

    (b)

    Decomposition reaction

    (c)

    Double Decomposition reaction

    (d)

    Combination reaction

  33. Which of the following reaction does not occur?

    (a)

    Fe+CuSO4⟶ FeSO4+Cu

    (b)

    Pb+ CuCl2 ⟶ PbCl2 + Cu

    (c)

    Cu+PbSO4⟶CuSO4+Pb

  34. The ore of aluminium is-------------

    (a)

    Haematite

    (b)

    Magnetite

    (c)

    Bauxite

    (d)

    Siderite

  35. Number of periods in periodic table is_______

    (a)

    7

    (b)

    17

    (c)

    8

    (d)

    18

  36. The process of entracting the ores from the earth's crust is called_____

    (a)

    Mining

    (b)

    Gangue

    (c)

    Metallurgy

    (d)

    Slag

  37. Group 17 elements are called as______family.

    (a)

    alkali metal

    (b)

    chalcogen

    (c)

    halogen

    (d)

    inert gases

  38. Alkanes have the general formula CnH2n+2 .The molecular formula of the first hydrocarbon is_______

    (a)

    CH4

    (b)

    C2H4

    (c)

    C2H6

    (d)

    C2H2

  39. _________ is used as a preservative in food and fruit juices.

    (a)

    Vinegar

    (b)

    Ethanol

    (c)

    Formaldehyde

    (d)

    Acetone

  40. Chandrayan operated for_______days in space.

    (a)

    213

    (b)

    321

    (c)

    312

    (d)

    321

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