JEE Main questions
34495 published questions with worked solutions.
- Two reactions, R_1 and R_2 have identical pre-exponential factors. Activation energy of R_1 exceeds that of R_2 by 10 kJ mol^ -1...
- pK_a of a weak acid (HA) and pK_b of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is-
- Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is...
- Which of the following species is not paramagnetic ?
- Which of the following reactions is an example of a redox reaction ?
- The group having isoelectronic species is
- The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are
- In the following reactions, ZnO is respectively acting as a / an (a) ZnO + Na_2O Na_2ZnO_2 (b) ZnO + CO_2 ZnCO_3
- The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%), Carbon (22.9 %), Hydrogen (10.0%)...
- The formation of which of the following polymers involves hydrolysis reaction?Not in JEE Main or NEET syllabus
- The increasing order of the reactivity of the following halides for the S_N1 reaction is : (I) CH_3CH(Cl)CH_2CH_3 (II)...
- 3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers...
- The function f : R [- 1 2 , 1 2 ] defined as f(x) = x 1 + x^2 , is
- If, for a positive integer n, the quadratic equation, x(x + 1) + (x + 1)(x + 2) + + (x + n - 1 )(x + n) = 10n has two consecutive...
- Let ω be a complex number such that 2ω + 1 = z where z = -3 . If vmatrix 1 & 1 & 1 1 & - ^2 - 1 & ^2 1 & ^2 & ^7 vmatrix = 3k,...
- If A = bmatrix 2 & -3 -4 & 1 bmatrix , then adj (3A^2 + 12A) is equal to
- If S is the set of distinct values of 'b' for which the following system of linear equations x + y + z = 1 x + ay + z = 1 ax + by...
- A man X has 7 friends, 4 of them are ladies and 3 are men. His wife Y also has 7 friends, 3 of them are ladies and 4 are men....
- The value of ( ^ 21 C_1 - ^ 10 C_1) + ( ^ 21 C_2 - ^ 10 C_2) + ( ^ 21 C_3 - ^ 10 C_3) + ( ^ 21 C_4 - ^ 10 C_4) + + ( ^ 21 C_ 10 -...
- _ x 2 x - x ( - 2x)^3 equals :