JEE Main questions
34495 published questions with worked solutions.
- A plane electromagnetic wave of wavelength has an intensity I. It is propagating along the positive Y-direction. The allowed...
- When XO_2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO_3, a dark green product is formed...
- Among the oxides of nitrogen : N_2O_3, N_2O_4 and N_2O_5; the molecule(s) having nitrogen-nitrogen bond is/are -
- In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively -
- At 320 K, a gas A_2 is 20 % dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol^ -1 is approximately...
- Which of the following complexes will show geometrical isomerism ?
- When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-amino-phenol produced is ….....
- An unknown chlorohydrocarbon has 3.55 % of chlorine. If each molecule of the hydrocarbon has one chlorine atom only, chlorine...
- The mass of non-volatile, non-electrolyte solute (molar mass = 50 g mol^ -1 ) needed to be dissolved in 114 g octane to reduce...
- Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is :...
- The gas phase reaction 2NO_2(g) → N_2O_4(g) is an exothermic reaction. The decomposition of N_2O_4, in equilibrium mixture of...
- Which one of the following is not a property of physical adsorption ?Not in JEE Main or NEET syllabus
- A group 13 element 'X' reacts with chlorine gas to produce a compound XCl_3. XCl_3 is electron deficient and easily reacts with...
- If 50 % of a reaction occurs in 100 seconds and 75 % of the reaction occurs in 200 seconds, the order of this reaction is -
- Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?
- Let A = bmatrix 1 & 0 & 0 1 & 1 & 0 1 & 1 & 1 bmatrix and B = A^ 20 . Then the sum of the elements of the first column of B is ?
- A man on the top of a vertical tower observes a car moving at a uniform speed towards the tower on a horizontal road. If it takes...Not in JEE syllabus
- Let 1 x_1 , 1 x_2 , 1 x_3 , , (x_i 0 for i = 1, 2, , n) be in A.P. such that x_1 = 4 and x_ 21 = 20. If n is the least positive...
- The locus of the point of intersection of the lines, 2 x - y + 4 2 k = 0 and 2 kx + ky - 4 2 = 0 (k is any non-zero real...
- The number of numbers between 2,000 and 5,000 that can be formed with the digits 0, 1, 2, 3, 4, (repetition of digits is not...