Practice questions
88551 published questions with worked solutions.
- A vertical closed cylinder is separated into two parts by a frictionless piston of mass m and of negligible thickness. The piston...
- An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered...
- A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning...
- A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0 ms^ -1 , at right angles to...
- A long cylindrical vessel is half filled with a liquid. When the vessel is rotated about its own vertical axis, the liquid rises...
- In a radioactive decay chain, the initial nucleus is ^ 232 _ 90 Th. At the end there are 6 α-particles and 4 β-particles which...
- A paramagnetic material has 10^ 28 atoms/m^3. Its magnetic susceptibility at temperature 350 K is 2.8 10^ -4 . Its susceptibility...Not in JEE Advanced syllabus
- To double the covering range of a TV transmission tower, its height should be multiplied by:Not in JEE or NEET syllabus
- °_m for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm^2 mol^ -1 , respectively. If the conductivity of 0.001 M HA is 5 10^ -5...
- Molecules of benzoic acid (C_6H_5COOH) dimerise in benzene. 'w' g of the acid dissolved in 30 g of benzene shows a depression in...
- If the de Broglie wavelength of the electron in nth Bohr orbit in a hydrogenic atom is equal to 1.5 a_0 (a_0 is Bohr radius),...
- Given: (i) C(graphite) + O_2(g) → CO_2(g); _rH° = x kJ mol^ -1 ; (ii) C(graphite) + ½O_2(g) → CO(g); _rH° = y kJ mol^ -1 ; (iii)...
- 8 g of NaOH is dissolved in 18 g of H_2O. Mole fraction of NaOH in solution and molality (in mol kg^ -1 ) of the solution...
- If K_ sp of Ag_2CO_3 is 8 10^ -12 , the molar solubility of Ag_2CO_3 in 0.1 M AgNO_3 is:
- The two monomers for the synthesis of Nylon 6,6 are:Not in JEE Main or NEET syllabus
- The volume strength of 1 M H_2O_2 is: (Molar mass of H_2O_2 = 34 g mol^ -1 )
- The element that shows greater ability to form pπ-pπ multiple bonds, is:
- Chlorine on reaction with hot and concentrated sodium hydroxide gives:
- The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is:
- The correct order of atomic radii is: