CBSE X Questions
Find the HCF of 96 and 404 by the prime factorisation method
Find the HCF of 96 and 404 by the prime factorisation method. Hence, find their LCM.
Read more …A sweet seller has 420 kaju barfis and 130 badam barfis
A sweet seller has 420 kaju barfis and 130 badam barfis. She wants to stack them in such a way that each stack has the same number, and they take up the least area of the tray. What is the number of that can be placed in each stack for this purpose?
Read more …How can solar energy solve the energy problem to some extent in India
How can solar energy solve the energy problem to some extent in India? Give your opinion.
Read more …In the present day energy crisis what steps will you like to take for saving energy
In the present day energy crisis what steps will you like to take for saving energy?
Read more …How is the mining activity injurious to the health
How is the mining activity injurious to the health of the miners and environment? Explain.
Read more …Which will have highest concentration of non-biodegradable chemicals
The following organisms form a food chain.
Insect, Hawk, Grass, Snake, Frog
Which of these will have highest concentration of non-biodegradable chemicals? Name the phenomenon.
Read more …Why is there a need to harness non-conventional sources of energy
Why is there a need to harness non-conventional sources of energy? Give two main reasons.
Read more …Human beings occupy the top level in any food chain
"Human beings occupy the top level in any food chain." What are the consequences of this on our body?
Read more …Mention difference between Pepsin and Trypsin
Mention any one point of difference between Pepsin and Trypsin.
Read more …How do Mendel’s experiments show that traits may be dominant or recessive
How do Mendel’s experiments show that traits may be dominant or recessive?
Read more …Draw a neat diagram of human brain
Draw a neat diagram of human brain and label Medulla and Cerebellum. Write the functions of the above mentioned parts.
Read more …Both overproduction and underproduction of Growth hormone leads to disorders
"Both overproduction and underproduction of Growth hormone leads to disorders in the body." Explain
Read more …Write Structural Formula Of Ethanol
Write the structural formula of ethanol. What happens when it is heated with excess of conc. H2SO4 at 443 K? Write the chemical equation for the reaction stating the role of conc. H2SO4 in this reaction.
Read more …Distinguish Between Esterification And Saponification Reactions
Distinguish between esterification and saponification reactions with the help of the chemical equations for each. State one use of each (i) esters, and (ii) saponification process.
Read more …Why Are Certain Compounds Called Hydrocarbons
Why are certain compounds called hydrocarbons? Write the general formula for homologous series of alkanes, alkenes and alkynes and also draw the structure of the first member of each series. Write the name of the reaction that converts alkenes into alkanes and also write a chemical equation to show the necessary conditions for the reaction to occur.
Read more …Describe Characteristics Of Durg-Bastar-Chandrapur Iron Ore Belt
Describe Characteristics Of Durg-Bastar-Chandrapur Iron Ore Belt?
Read more …Analyse Role Of Popular Struggles In Development Of Democracy
Analyse Role Of Popular Struggles In Development Of Democracy?
Read more …How Pressure Groups And Movements Strengthen Democracy
How Pressure Groups And Movements Strengthen Democracy?
Read more …Why Is It Necessary To Conserve Mineral Resources? Explain Ways To Conserve
Why Is It Necessary To Conserve Mineral Resources? Explain Ways To Conserve
Read more …Two dairy owners A and B sell flavoured milk filled to capacity
Two dairy owners A and B sell flavoured milk filled to capacity in mugs of negligible thickness, which are cylindrical in shape with a raised hemispherical bottom. The mugs are 14 cm high and have diameter of 7 cm as shown in given figure. Both A and B sell flavoured milk at the rate of Rs. 80 per litre. The dairy owner A uses the formula πr2h to find the volume of milk in the mug and charges Rs. 43.12 for it. The dairy owner B is of the view that the price of actual quantity of milk should be charged. What according to him should be the price of one mug of milk? Which value is exhibited by the dairy owner B? (Use π = 22/7)
Find the mode of the following distribution of marks obtained by the students
Find the mode of the following distribution of marks obtained by the students in an examination:
Given the mean of the above distribution is 53, using empirical relationship estimate the value of its median.
Read more …Water in a canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km/h
Water in a canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km/h. How much area will it irrigate in 30 minutes, if 8 cm of standing water is needed?
Read more …In given figure ABPC is a quadrant of a circle of radius 14 cm
In given figure ABPC is a quadrant of a circle of radius 14 cm and a semicircle is drawn with BC as diameter. Find the area of the shaded region.
Show that in a right triangle, the square of the hypotenuse is equal to
Show that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
Read more …
In given figure XY and X'Y' are two parallel tangents to a circle
In given figure XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X'Y' at B. Prove that ∠ AOB = 90°.
The points A(4, –2), B(7, 2), C(0, 9) and D(–3, 5) form a parallelogram
The points A(4, –2), B(7, 2), C(0, 9) and D(–3, 5) form a parallelogram. Find the length of the altitude of the parallelogram on the base AB.
Read more …In what ratio does the x-axis divide the line segment joining the points (–4, –6) and (–1, 7)
In what ratio does the x-axis divide the line segment joining the points (–4, –6) and (–1, 7)? Find the co-ordinates of the point of division.
Read more …If (1, p/3) is the mid-point of the line segment joining the points (2, 0) and (0, 2/9)
If (1, p/3) is the mid-point of the line segment joining the points (2, 0) and (0, 2/9), then show that the line 5x + 3y + 2 = 0 passes through the point (–1, 3p).
Read more …In a given ammeter, a student sees that needle indicates 17 divisions
In a given ammeter, a student sees that needle indicates 17 divisions in ammeter while performing an experiment to verify Ohm’s law. If ammeter has 10 divisions between 0 and 0.5A, then what is the value corresponding to 17 divisions?
Read more …A student conducted an experiment to show CO2 is released
A student conducted an experiment to show CO2 is released during respiration. List two precautions that he or she must take for obtaining correct observations.
Read more …Riya performs two set of experiments to study the length of the foam
Riya performs two set of experiments to study the length of the foam formed which are as follows:
Set I: she takes 10 ml of distilled water in test tube “A” and adds 5-6 drops of liquid soap in it and shakes the test tube vigorously.
Set II: she takes 10 ml of distilled water in a test tube “A” and adds 5-6 drops of liquid soap with half spoonful of CaSO4 in it and shakes the test tube.
Write your observation and reason.
Read more …What do you observe when you drop a few drops of acetic acid
What do you observe when you drop a few drops of acetic acid to a test tube containing:
a) Phenolphthalein c) distilled water
b) Universal indicator d) sodium hydrogen carbonate
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