JEE Main questions
34495 published questions with worked solutions.
- For the following reactions CH_3CH_2CH_2Br + Z^ k_s ( substitution ) CH_3CH_2CH_2Z + Br^ CH_3CH_2CH_2Br + Z^ k_e ( elimination )...
- The redox reaction among the following is :
- The bond order and the magnetic characteristics of CN^- are :
- Within each pair of element F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon and electron...
- The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :Not in JEE Main or NEET syllabus
- The number of possible optical isomers for the complexes MA_2B_2 with sp^3 and dsp^2 hybridized metal atom, respectively, is :...
- The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L ^ -1 . If H_2SO_4 is used for the flocculation of arsenic...Not in JEE Main or NEET syllabus
- 3 g of acetic acid is added to 250 mL of 0.1 M HCl and the solution made up to 500 mL. To 20 mL of this solution 1 2 mL of 5 M...
- The standard heat of formation ( _f H^0_ 298 ) of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite...
- The number of sp^2 hybridised carbons present in "Aspartame" is ____.
- The value of for which 4 _ -1 ^ 2 e^ - |x| dx=5, is:
- Let f(x) be a polynomial of degree 5 such that x= 1 are its critical points. If _ x 0 (2+ f(x) x^3 )=4, then which one of the...
- Let a , b and c be three unit vectors such that a + b + c = 0 . If = a b + b c + c a and d = a b + b c + c a , then the ordered...
- Let y = y(x) be a function of x satisfying y 1-x^2 =k-x 1-y^2 where k is a constant and y ( 1 2 )=- 1 4 . Then dy dx at x= 1 2 ,...
- The coefficient of x^7 in the expression (1+x)^ 10 +x(1+x)^9+x^2(1+x)^8+ +x^ 10 is:
- Let and be the roots of the equation x^2-x-1=0. If p_k=( )^k+( )^k, k 1, then which one of the following statements is not true?
- If the sum of the first 40 terms of the series, 3 + 4 + 8 + 9 + 13 + 14 + 18 + 19 +…… is (102)m, then m is equal to:
- The area (in sq. units) of the region (x, y) R^2 4x^2 y 8x+12 is:
- Let a_1, a_2, a_3, be a G.P. such that a_1<0, a_1+a_2=4 and a_3+a_4=16. If _ i=1 ^ 9 a_i=4 , then is equal to:
- If _1 and _2 be respectively the smallest and the largest values of in (0, 2 )- which satisfy the equation, 2 ^2 - 5 +4=0, then _...Not in JEE Main syllabus