Practice questions
88551 published questions with worked solutions.
- Match the thermodynamic processes taking place in a system with the correct conditions. In the table : Q is the heat supplied, W...
- The driver of a bus approaching a big wall notices that the frequency of his bus's horn changes from 420 Hz to 490 Hz when he...
- A capacitor C is fully charged with voltage V_0. After disconnecting the voltage source, it is connected in parallel with another...
- The electric field of a plane electromagnetic wave is given by E =E_0( x + y ) (kz- t). Its magnetic filed will be given by :
- A cube of metal is subjected to a hydrostatic pressure of 4 GPa. The percentage change in the length of the side of the cube is...
- The change in the magnitude of the volume of an ideal gas when a small additional pressure P is applied at constant temperature,...
- Orange light of wavelength 6000 10^ -10 m illuminates a single slit of width 0.6 10^ -4 m. The maximum possible number of...
- The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two...
- The one that can exhibit highest paramagnetic behaviour among the following is : gly = glycinato; bpy = 2, 2'-bipyridine
- 250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO_3 and 0.1 M AuCl. The solution was...
- The reaction in which the hybridization of the underlined atom is affected is :
- The molecule in which hybrid MOs involve only one d-orbital of the central atom is :
- An alkaline earth metal 'M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to...Not in JEE Main or NEET syllabus
- The major product [B] In the following reactions is : CH_3 - CH_2 - CH(CH_3) - CH_2 - OCH_2 - CH_3 [ Heat ] HI [ A ] [ ] alcohol...
- The incorrect statements(s) among (a) – (c) is are : (a) W(VI) is more stable than Cr(VI). (b) in the presence of HCl...
- A sample of red ink (a colloidal suspension) is prepared by mixing eosin dye, egg white, HCHO and water. The component which...Not in JEE Main or NEET syllabus
- The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature...
- Consider the following equations: 2Fe^ 2+ +H_2O_2 xA+yB (in basic medium) 2MnO_4^-+6H^++5H_2O_2 x'C+y'D+z'E (in acidic medium)...
- A 100 mL solution was made by adding 1.43 g of Na_2CO_3.xH_2O . The normality of the solution is 0.1 N. The value of x is...
- The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm. The osmotic pressure of a...