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Kalyani

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  1. Asked: December 11, 2021In: Class 10 Science

    The focal length of a concave mirror with radius of curvature 12 cm is

    Best Answer
    Kalyani
    Added an answer on December 13, 2021 at 3:54 am

    [D] - 6 cm Focal length f = - R/2 or -12/2 = -6 cm

    [D] – 6 cm
    Focal length
    f = – R/2
    or -12/2
    = -6 cm

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  2. Asked: December 11, 2021In: Class 10 Science

    Where does aerobic respiration occur in a cell?

    Kalyani
    Added an answer on December 13, 2021 at 3:54 am

    [A] Mitochondria

    [A] Mitochondria

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  3. Asked: December 11, 2021In: Class 10 Science

    Breathing is the process that brings oxygen in the air into your lungs and moves oxygen and through your body. It involves two processes- inhalation (breathing in) and exhalation (breathing out). Which is the correct sequence of air passage during inhalation?

    Kalyani
    Added an answer on December 13, 2021 at 3:54 am

    [D] Nostrils → pharynx → larynx → trachea → alveoli

    [D] Nostrils → pharynx → larynx → trachea → alveoli

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  4. Asked: December 11, 2021In: Class 10 Science

    When aqueous sodium carbonate (Na₂CO₃) reacts with HCl (aq), it gives

    Kalyani
    Added an answer on December 13, 2021 at 3:54 am

    [B] NaCl, H₂O and CO₂

    [B] NaCl, H₂O and CO₂

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  5. Asked: December 11, 2021In: Class 10 Science

    The given reaction shows: 3RSO₄ + 2Q → Q₂(SO₄)₃ + 3R

    Kalyani
    Added an answer on December 13, 2021 at 3:54 am

    [A] Q is more reactive than R

    [A] Q is more reactive than R

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