What is the general Q-value for alpha-decay? [A] greater than 0 [B] less than 0 [C] equal to 0 [D] None of the above
Adv.
greater than 0
When is the gamma ray emitted? [A] When a nucleus in a ground state goes to the excited state [B] When a nucleus in an excited state spontaneously decays to its ground state [C] When alpha rays and beta rays collide [D] None of the above
Which of the following is correct about the principal quantum number? [A] It determines the size of the orbital [B] It can have positive integer values [C] It identifies the shell [D] All of the above
What is the total number of allowed orbitals in a shell, if principal quantum number is n? [A] n [B] 2n [C] n2 [D] n3
Which of the following quantum number determines the number of sub-shells? [A] Electron spin quantum number [B] Principal quantum number [C] Magnetic quantum number [D] Azimuthal quantum number
Which orbital will have lower energy if two orbitals have the same value of (n+l)? [A] orbital with lower value of n [B] orbital with lower value of l [C] orbital with lower value of (n-l) [D] None of the above
Which of the following substance was used as a moderator in CIRUS reactor? [A] Heavy water [B] water [C] solid graphite [D] No moderator was used
What do we call the reactions in which heat is generated? [A] Exothermic [B] Endothermic [C] Both a and b [D] None
Which of the following reactions take place when iron nail in a copper sulphate solution becomes brownish in colour? [A] Decomposition reaction [B] Displacement reaction [C] Double Displacement reaction [D] None of the above
Which of these methods can be used to prevent rancidity? [A] Adding antioxidants to the food [B] Storing food at low temperature [C] Replace the air with nitrogen in the packing material [D] All of the above
What is the order of the reaction which is independent of the concentration of reactants? [A] Zero order [B] First order [C] Second order [D] Third order
All Questions
Physics
Chemistry
Mathematics
English
Organic Chemistry
Inorganic Chemistry
Physical Chemistry
Algebra
Geometry