Engineering Questions — JEE Main
409 solved questions with detailed explanations
Q.52. The first and second ionization constants of a weak dibasic acid are and respectively. 0.1 mol of was dissolved in 1L of 0.1 M HCl solution. The concentration of in the resultant solution i
Q.30. A solid sphere of mass M and radius R is divided into two unequal parts. The smaller part having mass M/8 is converted into a sphere of radius r and the larger part is converted into a circular
Q.8. Let the mean and the variance of seven observations , , be 8 and 16 respectively. Then the quadratic equation whose roots are and is:
Q.18. The value of the integral is:
Q.66. Given below are two statements : Statement-I : 3-phenylpropene reacts with HBr and gives secondary alkyl bromide having a chiral carbon atom as the major product. Statement-II: Aryl chlorides an
Q.30. A planet (P) is moving around the star of mass in the orbit of radius . Another planet (P) is moving around another star of mass in a orbit of radius . Ratio of time periods of revolution of P
Q.33. A slit of width a is illuminated by light of wavelength . The linear separation between and minima in the diffraction pattern produced on a screen placed at a distance D from the slit system i
Q.28. A mass of 1 kg kept in a inclined plane with 30° inclination with respect to horizontal plane and it is at rest initially. Then the whole assembly is moved up with constant velocity of 4 m/s. Th
Q.26. Match List-I with List-II. List-I List-II (A) Meter (L) I. (B) Second (S) II. (C) Kilogram (M) III. (D) Kelvin (K) IV. where h (Planck's constant), G (gravitational constant) and c (speed of
Q.69. Given below are two statements : Statement-I : [Figure: Glucose anomers] are two anomers of D-(+)-glucose. Statement-II : The open chain forms of D-glucose and D-fructose contain three similar c