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CBSE->Std 10 Questions

Total Questions 2595
what is vaccination?
what is double circulation?
GIVE 5 EXAMPLES OF COMBINATION REACTION.
HOW MANY TYPES OF ANIMALS
how many colors are in flag of AUSTRILIA
what do you meant by coil of an electric current
what do you meant by respiration
how many colors are in bird peacock
WHY IS POWER SHARING DESIRABLE?????
what are lifestyle diseases?
Did the handle of a racing bike move or not with scientific explaination.
Can x-3 be the remainder on the division of a polynomial p(x)by (2x+5). Justify your answer (2 marks)
If alpha , beta are the roots of the quadratic polynomial p(x)= x2-(k-6)x+(2k+1).Find the value of k, if alpha + beta = alpha × beta (2 marks)
If alpha and beta are the zeroes of x2+7x+12,then find the value of 1/alpha + 1/beta-2alpha×beta.
From a quadratic polynomial p(y) with sum and product of zeros as 2 and (-3)/5 respectively. (2 marks)
Find a quadratic polynomial whose zeroes are 3+?5 and 3-?5 (2 marks)
What must be added to the polynomial f(x)= x4+2x3-2x2+x-1 so that the resulting polynomial is exactly divisible by x2+2x-3 (2 marks)
Find a quadratic polynomial with zeroes 3+?2 and 3-?2 (2 marks)
Divide 6x3+13x2+x-2 by 2x+1 and find quotient and remainder(2 marks)
i didnt understand how to balance the chemical equation ?