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Explore Class 10 Compulsory Science and Technology past and model questions by chapter, year, marks and question type.
322 questions found
In the given figure, what is the weight of an object in liquid?
i. 5 N
ii. 25 N
iii. 30 N
iv. 35 N
The following table shows the four groups of animals. To which group does fish belong?
Animals | Invertebrates | Vertebrates |
Terrestrial | W | X |
Aquatic | Y | Z |
i. W
ii. X
iii. Y
iv. Z
In which group of modern periodic table does the element having electronic configuration 1s² 2s² 2p⁶ 3s² lie?
Which theory is closely related to Hubble's study?
i. Heliocentric theory
ii. Geocentric theory
iii. Big-Bang theory
iv. Hubble's theory
The given circuit diagram is used for the electrorefining of a metal which is extracted from Argentite ore. Identify the two main errors in this circuit.
Write the balanced chemical equation when dust formed by burning magnesium ribbon is added to water.
Write the differences between alkane and alkyne on the basis of number of bonds and general molecular formula.
Nowadays, Facebook messenger is used for talking with friends through social media.
Some information about blood cells is given in the table below:
Name of blood cells | Shape | Nucleus | Place of production |
X | Biconcave | absent | Bone marrow |
Y | Irregular | present | Bone marrow |
Z | Spherical | absent | Bone marrow |
Draw a labelled diagram of strands of cell having hereditary characters with nitrogen bases.
What is the gravitational force of attraction between these two heavenly bodies? In which condition, gravitational force of attraction is equal to gravitational constant?
A charger has a transformer which reduces supply voltage from 220 V to 5 V. Calculate the ratio of number of turns in the primary coil to that of the secondary coil.
Between the top of the mountain and its base, where will an object weigh more? Write with reason.
Write any two ways to increase the induced current in a dynamo.
What type of cell division takes place during the formation of gametes?
Your friend needs a strength-enhancing medicinal herb. In this situation, which herb would you advise your friend to use? Write down any one method of conservation of this medicinal herb.
Write any two characteristics of the division of Marchantia.
Though males have both and sex chromosomes, some of them have only sons and some have only daughters. Why? Write with reason.
Write any one balanced chemical equation of a reaction that uses a catalyst.
'It is good to use traditional and chemical-free method to ripen fruits.' Give any two arguments to support this statement.