Practice questions
88551 published questions with worked solutions.
- The Molarity (M) of an aqueous solution containing 5.85 g of NaCl in 500 mL water is: (Given: Molar Mass Na: 23 and Cl: 35.5...
- Identify the correct set of reagents or reaction conditions 'X' and 'Y' in the following set of transformation. CH_3–CH_2–CH_2–Br...
- The correct order of first ionization enthalpy values of the following elements is: (A) O (B) N (C) Be (D) F (E) B Choose the...
- The enthalpy of formation of ethane (C_2H_6) from ethylene by addition of hydrogen where the bond energies of C–H, C–C, C=C, H–H...
- X g of ethylamine is subjected to reaction with NaNO_2/HCl followed by water; evolved dinitrogen gas which occupied 2.24 L volume...
- The de-Broglie's wavelength of an electron in the 4th orbit is _______ πa_0. (a_0 = Bohr's radius)
- Only 2 mL of KMnO_4 solution of unknown molarity is required to reach the end point of a titration of 20 mL of oxalic acid (2 M)...
- Consider the following reaction: MnO_2 + KOH + O_2 → A + H_2O. Product 'A' in neutral or acidic medium disproportionate to give...
- 2.5 g of a non-volatile, non-electrolyte is dissolved in 100 g of water at 25°C. The solution showed a boiling point elevation by...
- The number of different chain isomers for C_7H_ 16 is __________.
- Number of molecules/species from the following having one unpaired electron is ________. O_2, O_2^ -1 , NO, CN^ -1 , O_2^ 2-
- Let f : R → R be a function given by f(x) = cases 1 - 2x x^2 , & x < 0 , & x = 0 1 - x x , & x > 0 cases , where α, β ∈ R. If f...
- Three urns A, B and C contain 7 red, 5 black; 5 red, 7 black and 6 red, 6 black balls, respectively. One of the urn is selected...
- If the solution y = y(x) of the differential equation (x^4 + 2x^3 + 3x^2 + 2x + 2)dy - (2x^2 + 2x + 3)dx = 0 satisfies y(-1) = -...
- Let the sum of the maximum and the minimum values of the function f(x) = 2x^2 - 3x + 8 2x^2 + 3x + 8 be mn where gcd(m, n) = 1....
- One of the points of intersection of the curves y = 1 + 3x − 2x² and y = 1x is ( 12, 2 ). Let the area of the region enclosed by...
- If the system of equations x + (√2 sin α)y + (√2 cos α)z = 0, x + (cos α)y + (sin α)z = 0, x + (sin α)y − (cos α)z = 0 has a...
- There are 5 points P_1, P_2, P_3, P_4, P_5 on the side AB, excluding A and B, of a triangle ABC. Similarly there are 6 points...
- Let f(x) = cases -2, & -2 x 0 x - 2, & 0 < x 2 cases and h(x) = f(|x|) + |f(x)|. Then _ -2 ^ 2 h(x) ,dx is equal to-
- The sum of all rational terms in the expansion of (2^ 15 + 5^ 13 )^ 15 is equal to-