Practice questions
88551 published questions with worked solutions.
- The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is: (Specific heat of water...
- For the reaction, 2A + B → products, when the concentrations of A and B both were doubled, the rate of the reaction increased...
- The increasing basicity order of the following compounds is: (A) CH_3CH_2NH_2 (B) CH_3CH_2NH(CH_2CH_3) (C) (CH_3)_3N (D)...
- Homoleptic octahedral complexes of a metal ion 'M^ 3+ ' with three monodentate ligands L_1, L_2 and L_3 absorb wavelengths in the...
- When the first electron gain enthalpy ( _ eg H) of oxygen is −141 kJ/mol, its second electron gain enthalpy is:
- Consider the following reversible chemical reactions: A_2(g) + B_2(g) ⇌ 2AB(g); K_1 …(1) 6AB(g) ⇌ 3A_2(g) + 3B_2(g); K_2 …(2) The...
- Good reducing nature of H_3PO_2 is attributed to the presence of:
- The pH of rain water, is approximately:
- The transition element that has lowest enthalpy of atomization, is:
- The metal that forms nitride by reacting directly with N_2 of air, is:Not in JEE Main or NEET syllabus
- Let z_0 be a root of the quadratic equation, x^2 + x + 1 = 0. If z = 3 + 6iz_0^ 81 - 3iz_0^ 93 , then arg z is equal to:
- Let f: [0, 1] → R be such that f(xy) = f(x)·f(y), for all x, y ∈ [0, 1], and f(0) ≠ 0. If y = y(x) satisfies the differential...
- The coefficient of t^4 in the expansion of ( 1 - t^6 1 - t )^3 is:
- Let a = i + j + 2 k, b = b_1 i + b_2 j + 2 k and c = 5 i + j + 2 k be three vectors such that the projection vector of b on a is...
- If f(x) = 5x^8 + 7x^6 (x^2 + 1 + 2x^7)^2 dx, (x ≥ 0), and f(0) = 0, then the value of f(1) is:
- If x = 3 tan t and y = 3 sec t, then the value of d^2y dx^2 at t = 4, is:
- The sum of the following series 1 + 6 + 9(1^2 + 2^2 + 3^2) 7 + 12(1^2 + 2^2 + 3^2 + 4^2) 9 + 15(1^2 + 2^2 + + 5^2) 11 + up to 15...
- Let a, b and c be the 7th, 11th and 13th terms respectively of a non-constant A.P. If these are also the three consecutive terms...
- A hyperbola has its centre at the origin, passes through the point (4, 2) and has transverse axis of length 4 along the x-axis....
- Let the equations of two sides of a triangle be 3x − 2y + 6 = 0 and 4x + 5y − 20 = 0. If the orthocentre of this triangle is at...