10th Standard Science English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 7

10th Standard

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Science

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

    Part A

    35 x 1 = 35
  1. If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will

    (a)

    decrease by 50%

    (b)

    increase by 50%

    (c)

    decrease by 25%

    (d)

    increase by 300%

  2. Opening a door is an example of _______

    (a)

    a non contact force

    (b)

    contact force

    (c)

    balanced

    (d)

    unbalanced

  3. The resultant of action & reaction forces is ______

    (a)

    greater than zero

    (b)

    less than zero

    (c)

    zero

    (d)

    ore

  4. A lift of mass 1000 kg which is moving with an acceleration of 1ms-2 in upward direction, then the tension developed in string which is connected to lift is

    (a)

    10,000 N

    (b)

    10,800 N

    (c)

    9800 N

    (d)

    11000 N

  5. If the energy of the incident and scattered beam of light are same, then it is called ______ scattering

    (a)

    Ray light

    (b)

    Inelastic

    (c)

    Mie

    (d)

    Elastic

  6. The phenomena of light responsible for the working of the human eye is

    (a)

    Reflection

    (b)

    Refraction

    (c)

    Power

    (d)

    Accommodation

  7. Temperature is the average ______ of the molecules of a substance

    (a)

    difference in K.E and P.E

    (b)

    sum of P.E and K.E

    (c)

    difference in T.E and P.E

    (d)

    difference in K.E and T.E

  8. Which of the following has the fastest process of heat transfer?

    (a)

    Conduction

    (b)

    convection

    (c)

    Radiation

    (d)

    all the above

  9. Absolute scale is also called as ______

    (a)

    Kelvin scale

    (b)

    Celsius scale

    (c)

    Centigrade scale

    (d)

    Fahrenheit scale

  10. The resistance of a conductor is inversely proportional to its _______.

    (a)

    Volt

    (b)

    Length

    (c)

    Area

    (d)

    None ofthe above

  11. Which of the following produces large joule heating effect?

    (a)

    1A current through 2Ω resister for 3 seconds

    (b)

    1A current through 3Ω resistor for 2 seconds

    (c)

    2A current through 1Ω resistor for 2 seconds

    (d)

    3A current through 1Ω resistor for 1 second

  12. Ultrasound waves compared to audible sound waves have.

    (a)

    Lower frequency and Shorter wavelength

    (b)

    Lower frequency and longer wavelength

    (c)

    higher frequency and longer wavelength

    (d)

    higher frequency and shorter wavelength

  13. ____________ isotope is used for the treatment of cancer.

    (a)

    Radio Iodine

    (b)

    Radio Cobalt

    (c)

    Radio Carbon

    (d)

    Radio Nickel

  14. Positively charged radioactive rays are called _________ rays.

    (a)

    (b)

    β

    (c)

    (d)

    neutral

  15. Atom bomb explosions produce ______ waves.

    (a)

    gravitational

    (b)

    sand

    (c)

    shock

    (d)

    electric

  16. Mass of 1 mole of Nitrogen atom is

    (a)

    28 amu

    (b)

    14 amu

    (c)

    28 g

    (d)

    14 g

  17. The relative atomic masses of many elements are not whole number because

    (a)

    they are not determined accurately

    (b)

    they exist as isotopes

    (c)

    due to impurities

    (d)

    atoms ionize

  18. The vapour density of the Helium gas is

    (a)

    Equal to 1

    (b)

    Less than 1

    (c)

    Greater than 1

    (d)

    0

  19. Neon shows zero electron affinity due to _____.

    (a)

    stable arrangement of neutrons

    (b)

    stable configuration of electrons

    (c)

    reduced size

    (d)

    increased density

  20. The solubility of gases in liquid increases with ____________

    (a)

    increased volume

    (b)

    increased pressure

    (c)

    decreased pressure

    (d)

    none of these

  21. The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?

    (a)

    Neutralisation

    (b)

    Combustion

    (c)

    Precipitation

    (d)

    Single displacement

  22. When Zinc metal is placed in hydrochloric acid, the gas evolved is _________________

    (a)

    CO

    (b)

    CO2

    (c)

    H2

    (d)

    H2O

  23. Ethanoic acid turns

    (a)

    red litmus blue

    (b)

    blue litmus red

    (c)

    red litmus green

    (d)

    blue litmus green

  24. The xylem and phloem arranged side by side on same radius is called _________

    (a)

    radial

    (b)

    amphivasal

    (c)

    conjoint

    (d)

    None of these

  25. A patient with blood group O was injured in an accident and has blood loss. Which blood group the doctor should effectively use for transfusion in this condition?

    (a)

    O group

    (b)

    AB group

    (c)

    A or B group

    (d)

    all blood group

  26. The number of______ increases during allergy.

    (a)

    Basophil

    (b)

    RBC

    (c)

    Eosinophil

    (d)

    Monocyte

  27. The _____ is the second largest part of the brain.

    (a)

    cerebrum

    (b)

    medulla

    (c)

    cerebellum

    (d)

    pons

  28. To increase the sugar production in sugarcanes they are sprayed with _______

    (a)

    Auxin

    (b)

    Cytokinin

    (c)

    Gibberellins

    (d)

    Ethylene

  29. _____ is called Stress hormone.

    (a)

    Auxin

    (b)

    Gibberellin

    (c)

    Cytokinin

    (d)

    ABA

  30. _______from anterior pituitary stimulates milk secretion

    (a)

    Oxytocin

    (b)

    Prolactin

    (c)

    Progestrone

    (d)

    Oestrogen

  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. ________is a gene mutation

    (a)

    Deletion

    (b)

    Duplication

    (c)

    Translocation

    (d)

    Ploidy

  33. Excessive consumption of alcohol leads to

    (a)

    Loss of memory

    (b)

    Cirrhosis of liver

    (c)

    State of hallucination

    (d)

    Supression of brain

  34. All files are stored in the _____________

    (a)

    Folder

    (b)

    box

    (c)

    Pai

    (d)

    scanner

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