10th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Six

10th Standard

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Science

Time : 00:35:00 Hrs
Total Marks : 35

    Part A

    35 x 1 = 35
  1. The unit of ‘g’ is m s-2. It can be also expressed as

    (a)

    cm s-1

    (b)

    N kg-1

    (c)

    N m2 kg-1

    (d)

    cm2 s-2

  2. The momentum of a heavy object at rest will be

    (a)

    large

    (b)

    infinity

    (c)

    zero

    (d)

    small

  3. In a myopic eye, the image of the object is formed

    (a)

    behind the retina

    (b)

    on the retina

    (c)

    in front of the retina

    (d)

    on the blind spot

  4. The group of rays is ______

    (a)

    lines

    (b)

    dots

    (c)

    beam

    (d)

    none ofthese

  5. When a person is myopic, he / she can clearly see

    (a)

    Both nearby & far off

    (b)

    Only nearby objects

    (c)

    Only far off objects

    (d)

    Neither nearby nor far off objects

  6. SI unit of heat is

    (a)

    calorie

    (b)

    joule

    (c)

    kilo calorie

    (d)

    kelvin

  7. Kilowatt hour is the unit of

    (a)

    resistivity

    (b)

    conductivity

    (c)

    electrical energy

    (d)

    electrical power

  8. According to Ohm's law if voltage increase and resistance stays the same

    (a)

    Resistance decreases

    (b)

    Current increases

    (c)

    Current remains the same

    (d)

    Current decreases

  9. What happens to current and resistance if the voltage is doubled?

    (a)

    Current doubles and resistance doubles

    (b)

    Current doubles and resistance is halved

    (c)

    Current remains the same and resistance doubles

    (d)

    Current doubles and resistance remains the same

  10. Which statement is true?

    (a)

    Sound waves can propagate as longitudinal or transverse depending on the transmitting medium.

    (b)

    Sound waves are transverse and they propagate perpendicular to the transmitting medium.

    (c)

    Sound waves are longitudinal waves and they propagate parallel to the transmitting medium.

    (d)

    Sound waves can propagate as longitudinal or transverse depending on the temperature.

  11. A source emits a frequency of 1 kHz is moving toward a rest listener with a speed of 0.9 V, where V is the speed of sound wave. The frequency heard by the listener is ________.

    (a)

    10 Hz

    (b)

    0.1 Hz

    (c)

    100 Hz

    (d)

    10 kHz

  12. Unit of radioactivity is _____________

    (a)

    roentgen

    (b)

    curie

    (c)

    becquerel

    (d)

    all the above

  13. Kamini reactor is located at __________

    (a)

    Kalpakkam

    (b)

    Koodankulam

    (c)

    Mumbai

    (d)

    Rajasthan

  14. ૪ rays are ________ in charge.

    (a)

    positive

    (b)

    negative

    (c)

    neutral

    (d)

    none

  15. Minimum size of a system in which at least 1 neutron is available for further fission is called________.

    (a)

    cut - off size

    (b)

    critical size

    (c)

    range of reactor

    (d)

    capability criteria

  16. In the nucleus of 20Ca40, there are 

    (a)

    20 protons and 40 neutrons

    (b)

    20 protons and 20 neutrons

    (c)

    20 protons and 40 electrons

    (d)

    40 protons and 20 electrons

  17. Neon shows zero electron affinity due to _____.

    (a)

    stable arrangement of neutrons

    (b)

    stable configuration of electrons

    (c)

    reduced size

    (d)

    increased density

  18. Modern periodic table contains ______ groups.

    (a)

    9

    (b)

    32

    (c)

    18

    (d)

    64

  19. Solubility of NaCl in 100 ml water is 36 g. If 25 g of salt is dissolved in 100 ml of water how much more salt is required for saturation _____________

    (a)

    12g

    (b)

    11g

    (c)

    16g

    (d)

    20g

  20. Which of the following factors affect solubility?

    (a)

    temperature

    (b)

    pressure

    (c)

    nature of solute and solvent

    (d)

    all the above

  21. A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    iii and iv

    (d)

    i and iv

  22. Chemically rust is

    (a)

    hydrated ferrous oxide

    (b)

    Ferrous oxide

    (c)

    hydrated ferric oxide

    (d)

    Ferric oxide

  23. Which of the following are used as anaesthetics?

    (a)

    Carboxylic acids

    (b)

    Ethers

    (c)

    Esters

    (d)

    Aldehydes

  24. Kreb’s cycle takes place in

    (a)

    chloroplast

    (b)

    mitochondrial matrix

    (c)

    stomata

    (d)

    inner mitochondrial membrane

  25. The animals which give birth to young ones are

    (a)

    Oviparous

    (b)

    Viviparous

    (c)

    Ovoviviparous

    (d)

    All the above

  26. The ovaries ofleech lies in the ________segment.

    (a)

    10th

    (b)

    11th

    (c)

    13th

    (d)

    15th

  27. ‘Heart of heart’ is called

    (a)

    SA node

    (b)

    AV node

    (c)

    Purkinje fibres

    (d)

    Bundle of His

  28. Nerve cells do not possess

    (a)

    neurilemma

    (b)

    sarcolemma

    (c)

    axon

    (d)

    dendrites

  29. Which organ acts as both exocrine gland as well as endocrine gland

    (a)

    Pancreas

    (b)

    Kidney

    (c)

    Liver

    (d)

    Lungs

  30. A single highly coiled tube where sperms are stored, get concentrated and mature is known as

    (a)

    Epididymis

    (b)

    Vasa efferentia

    (c)

    Vas deferens

    (d)

    Seminiferous tubules

  31. The number of chromosomes found in human beings are __________________.

    (a)

    22 pairs of autosomes and 1 pair of allosomes

    (b)

    22 autosomes and 1 allosome

    (c)

    46 autosomes

    (d)

    46 pairs autosomes and 1 pair of allosomes.

  32. DNA fingerprinting is based on the principle of identifying _______ sequences of DNA

    (a)

    single stranded

    (b)

    mutated

    (c)

    polymorphic

    (d)

    repititive

  33. Which of the following is / are a fossil fuel?
    i. Tar
    ii. Coal
    iii. Petroleum

    (a)

    i only

    (b)

    i only ii

    (c)

    ii and iii

    (d)

    i, ii and iii

  34. Which of the following statement is wrong with respect to wind energy

    (a)

    wind energy is a renewable energy

    (b)

    the blades of wind mill are operated with the help of electric motor

    (c)

    production of wind energy is pollution free

    (d)

    usage of wind energy can reduce the consumption of fossil fuels.

  35. Where you will create category of blocks?

    (a)

    Block palette

    (b)

    Block menu

    (c)

    Script area

    (d)

    sprite

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