Practice questions
88551 published questions with worked solutions.
- Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence ofNot in JEE Main or NEET syllabus
- Under the same reaction conditions, initial concentration of 1.386 mol dm^ -3 of a substance becomes half in 40 seconds and 20...
- 2.5 mL of 2 5 M weak monoacidic base (K_b = 1 10^ -12 at 25 °C) is titrated with 2 15 M HCl in water at 25 °C. The concentration...
- STATEMENT-1: Bromobenzene upon reaction with Br_2/Fe gives 1,4-dibromobenzene as the major product. STATEMENT-2: In bromobenzene,...
- STATEMENT-1: Pb^ 4+ compounds are stronger oxidizing agents than Sn^ 4+ compounds. STATEMENT-2: The higher oxidation states for...
- STATEMENT-1: For every chemical reaction at equilibrium, standard Gibbs energy of reaction is zero. STATEMENT-2: At constant...
- A sonometer wire of length 1.5 m is made of steel. The tension in it produces an elastic strain of 1%. What is the fundamental...
- A projectile is given an initial velocity of ( i +2 j ) m/s, where i is along the ground and j is along the vertical. If g = 10...
- The supply voltage to a room is 120 V. The resistance of the lead wires is 6Ω. A 60 W bulb is already switched on. What is the...
- This question has Statement-I and Statement-II. Of the four choices given after the statements, choose the one that best...
- Two charges, each equal to q, are kept at x = – a and x = a on the x-axis. A particle of mass m and charge q_0 = q 2 is placed at...
- This question has Statement-I and Statement-II. Of the four choices given after the statements, choose the one that best...
- Two capacitors C_1 and C_2 are charged to 120 V and 200 V respectively. It is found that by connecting them together the...
- What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a...
- A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad...Not in JEE or NEET syllabus
- Let [ε₀] denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric...
- The magnetic field in a traveling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is -
- The real number k for which the equation, 2x^3 + 3x + k = 0 has two distinct real roots in [0, 1]
- The number of values of k, for which the system of equation : (k + 1) x + 8y = 4k, kx + (k + 3) y = 3k –1, has no solution, is -
- If P = bmatrix 1 & & 3 1 & 3 & 3 2 & 4 & 4 bmatrix is the adjoint of a 3 × 3 matrix A and |A| = 4, then α is equal to -