Practice questions
88551 published questions with worked solutions.
- An electric dipole is formed by two equal and opposite charges q with separation d. The charges have same mass m. It is kept in a...
- A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external...
- Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength...
- A circuit connected to an ac source of emf e = e_0 (100t) with t in seconds, gives a phase difference of 4 between the emf e and...
- A body of mass m_1 moving with an unknown velocity of v_1 i, undergoes a collinear collision with a body of mass m_2 moving with...
- The ratio of mass densities of nuclei of ^ 40 Ca and ^ 16 O is close to:
- The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H_2O)_6]_2[Fe(CN)_6], respectively, are:
- The IUPAC symbol for the element with atomic number 119 would be:
- The structure of Nylon-6 is:Not in JEE Main or NEET syllabus
- The ion that has sp^3d^2 hybridization for the central atom is:
- For the following reactions, equilibrium constants are given: S(s) + O_2(g) ⇌ SO_2(g); K_1 = 10^ 52 2S(s) + 3O_2(g) ⇌ 2SO_3(g);...
- The percentage composition of carbon by mole in methane is:
- The covalent alkaline earth metal halide (X = Cl, Br, I) is:
- The correct statement about ICl_5 and ICl_4^- is:
- Fructose and glucose can be distinguished by:
- The strength of 11.2 volume solution of H_2O_2 is: [Given that molar mass of H = 1 g mol^ -1 and O = 16 g mol^ -1 ]
- If three distinct numbers a, b, c are in G.P. and the equations ax^2 + 2bx + c = 0 and dx^2 + 2ex + f = 0 have a common root,...
- A student scores the following marks in five tests: 45, 54, 41, 57, 43. His score is not known for the sixth test. If the mean...
- If a point R(4, y, z) lies on the line segment joining the points P(2, −3, 4) and Q(8, 0, 10), then the distance of R from the...
- Which one of the following statements is not a tautology?Not in JEE syllabus