Class/Course - Class X

Subject - Science

Total Number of Question/s - 4224

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  • 1. Chemical Reactions and Equations - Quiz

    1. The chemical reaction between two substances is characterised by a change in colour from orange to green. These two substances are most likely to be:
    a) potassium dichromate solution and sulphur dioxide
    b) potassium permanganate solution and sulphure dioxide
    c) potassium permanganate solution and lemon juice
    d) potassium dichromate solution and carbon dioxide.

    2. The chemical reaction between quichlime and water is characterised by:
    a) evolution of hydrogen gas
    b) formation of slaked lime precipitate
    c) change in temperature of mixture
    d) change in colour of the product

  • 2. Acids, Bases and Salts - Quiz

    1. _________ is an oxide which produce bases when dissolved in water
    a) Acidic oxide
    b) Basic oxide
    c) Neutral oxide
    d) None of these

    2. The salt which contains two different negative and / or positive ions is:
    a) Double salt
    b) Acid salt
    c) Basic salt
    d) Normal salt

  • 3. Metals and Non-metals - Quiz

    1. Which of the following is a metalloid?
    a) Tin
    b) Germanium
    c) Phosphorus
    d) Chlorine

    2. The atomic number of an element Y is 17. The number of electrons in its ion Y- will be:
    a) 17
    b) 18
    c) 19
    d) 20

  • 4. Carbon and its Compounds - Quiz

    1. Vinegar is a :
    a) 25% solution of acetic acid in water
    b) 5% solution of acetic acid in water
    c) 40% solution of formic acid
    d) 50% solution of acetic acid in water

    2. The organic compounds which are isomeric with one another are:
    a) alcohols and aldehydes
    b) aldehydes and carboxylic acids
    c) ketones and aldehydes
    d) alcohols and ketones

  • 5. Periodic Classification of Elements - Quiz

    1. The minimum energy required to remove an electron from a unipositive ion is :
    a) I lonization energy
    b) II lonization energy
    c) III lonization energy
    d) All of above

    2. Elements were classified into metals and nonmetals by:
    a) Dobereiner
    b) Lavoisier
    c) Newland
    d) Faraday

  • 6. Life Processes - Quiz

    1. In anaerobic respiration, pyruvic acid in the muscles form
    a) Formic acid
    b) Glucose
    c) Lactic acid
    d) Alcohol

    2. What prevents the backflow of blood inside the heart during contraction?
    a) thick vascular walls of ventricles
    b) valves
    c) thin walls of atria
    d) all of the above

  • 7. Control and Coordination - Quiz

    1. The use of iodised salt is recommanded to prevent:
    a) diabetes
    b) gonorrhoea
    c) dysentary
    d) goitre

    2. The plant part which exhibits negative geotropism is:
    a) root
    b) stem
    c) branch
    d) leaves

  • 8. How do Organisms Reproduce? - Quiz

    1. Triploid enddosperm is found only in
    a) angiosperms
    b) gymnosperms
    c) pteridophytes
    d) spermatophytes

    2. Hydrophily takes place in
    a) Nymphaea
    b) Opunita
    c) Brassica
    d) Mimosa pudica

  • 9. Heredity and Evolution - Quiz

    1. The number of chromosomes in a normal human body cell is
    a) 46
    b) 43
    c) 44
    d) 45

    2. The presence of which of the following types of organs in two organisms indicates that they are not derived from the same ancestor?
    a) analogous organs
    b) respiratory organs
    c) digestive organs
    d) homologous organs

  • 10. Light - Reflection and Refraction - Quiz

    1. If the image formed is always virtual, the mirror can be:
    a) concave or convex
    b) concave or plane
    c) convex or plane
    d) only convex

    2. To obtain a magnification of, -2 with a convex lens of focal length 10 cm, the object should be placed:
    a) between 5 cm and 10 cm
    b) between 10 cm and 20 cm
    c) at 20 cm
    d) beyond 20 cm

  • 11. Human Eye and Colourful World - Quiz

    1. The colour of light which travels with minimum speed in glass is:
    a) Violet
    b) Blue
    c) Green
    d) Red

    2. A green book viewed through a red glass wil appear :
    a) black
    b) green
    c) red
    d) magenta

  • 12. Electricity - Quiz

    1. An electric kettle for use on a 230 V supply is rated at 3000 W. For safe working, the cable connected to it should be able to carry at least:
    a) 2 A
    b) 5 A
    c) 10 A
    d) 15 A

    2. The work done in moving a unit charge across two points in an electric circuit is a measure of;
    a) current
    b) potential difference
    c) resistance
    d) power

  • 13. Magnetic Effects of Electric Current - Quiz

    1. What is the most appropriate reason for the popularity of AC over DC?
    a) There is very little gain of energy while transmission
    b) There is very little loss of energy while transmission
    c) AC is not continuous
    d) DC cannot be generated

    2. A 1.25 kW heater works on a 220 V mains supply. What current rating would a suitable fuse have?
    a) 2 A
    b) 5 A
    c) 10 A
    d) 13 A

  • 14. Sources of Energy - Quiz

    1. Electricity from the ocean:
    a) Is expensive
    b) Can be generated by utilizing kinetic energy of the waves but not stored thermal energy
    c) Affects the organism of the region
    d) Produces a large amount of electricity

    2. A substance which produced a lot of heat on burning is called:
    a) Fuel
    b) Oxidizing agent
    c) Biomass
    d) Biogas

  • 15. Our Environment - Quiz

    1. Organismswhich synthesise carbohydrates from inorganic compounds by using radiant energy are called:
    a) decomposers
    b) producers
    c) herbivores
    d) carnivores

    2. Study of physical chemical and biological aspects of fresh water is called
    a) hydrology
    b) oceanography
    c) limnology
    d) genetics

  • 16. Management of Natural Resources - Quiz

    1. From which of the following sources we get all the things we use to consume ?
    a) Factories
    b) Agriculture
    c) Solar energy
    d) Water

    2. One of the following is not a direct stakeholder in the management (or conservation) of forests. This one is:
    a) the people who have paper mills
    b) the people who run the forest department
    c) the people who campaign for the conservation for the conservation of forests
    d) the people who live in urban areas