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CBSE->Std 10 Questions

Total Questions 2595
WHO IMPROVED THE STEAM ENGINE PRODUCED BY NEW COMEN?
describe AA similarity criteria?
diffrence between cross cutting and over lapping ?
determine a and b for which the following system of linear equation has infinite number of solutions 2x-(a-4)y = 2b +1;4x-(a-)y =5b-1
methane is a green house gas.but we say bio-gas is an excellent fuel because 75% of it constitute methane. but thats not a problem to earth?
what is the difference between caste and class?
what are the environmental consequences of of increasing demand for energy ? what steps would you suggest to reduce energy consumption ?
what are the advantages and disadvantages of solar cooker? Are there places where solar cookers would have limited utility ?
what are the qualities of an ideal source of energy ?
diffrence between endanged species and extent species ?
what is NREGA?
what are the importance of fuels?
can we make fuel?if yes,how?
Extraction of metal from ore.........?????????????
HCF of 65 and 117 is expressible in the form 65m-117. Find the LCM of 65 and 117 using prime factorization method.
what is solvey process
overloading function
"Acid rain"is a type of pollution that occurs when oxides of two elements combine with the moisture present in the atmosphere. The oxides of these two elements are released by burning of fossil fuels ,such as coal,petroleum,and natural gas .Which are these 2 elements?
42) Two resistors of resistance 2? and 4? are connect i) in series and ii) parallel to a given battery for same interval.Compute the ratio of the total quantity of heat produced in the combination in the 2 to cases.
43) Two resistors with resistance 10? and 15? are to be connected to a battery of e.m.f 5v as to obtained i) maximum current ii) minimum current a) how will you connect the resistance in each case ? b) Calculate the strength of total current in the circuit in the 2 cases