Question: Benzene with Br and CONH2 at the meta position is made to react with KOBr to give A and the same reactant is made to react with LiAlH4... View Article
a. The number of unpaired electrons in O_2^- is 1In [Cu(NH3)4]Cl2, Cu is in a +2 oxidation state.Outer electronic configuration of Cu is... View Article
a. 6b. 8c. 4d. 5Solution:Answer: (b)In CCP/FCC, there are two tetrahedral voids on every body that is diagonal of the unit cell. FCC has a total... View Article
a. Geb. Snc. Ind. PbSolution:Answer: (b)The element with the outer electron configuration of 4s2 4p1 is Gallium (Ga). Therefore, diagonally the... View Article
a. 0b. 1c. 2d. 3Solution:Answer: (c)In NiCl2, Ni is in +2 oxidation state.Hence, its electronic configuration is 3d8.Thus, the number of unpaired... View Article
a. COb. NO2c. CO2d. CFCSolution:Answer: (b)When fossil fuel is burnt nitrogen and dioxygen combine to yield significant quantities of nitric... View Article
a. 108.8 eVb. 81.6 eVc. 13.6 eVd. 95.2 eVSolution:Answer:(a)Second excitation energy means the electron is jumping from the first shell to the... View Article
a. sp3b. sp3dc. sp3d2d. Sp3d3Solution:Answer:(c)Hybridization can be predicted with the help of a steric number.Steric number = No. of sigma bond... View Article
a. Cleaning cloth with water b. Using liquid H2O2 in dying clothesc. Using tetrachloroethane in laundriesd. Using chlorine in bleaching... View Article
Question:Are the statements true or false? Statement-1: Dihedral angle of H2O2 in gas is 90°.Statement-2: Dihedral angle of H2O2 in solid is... View Article
a. The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitudeb. The refractive indices of the dispersed... View Article
Question:In which of the following, resonance is not possible? a. 1, 2b. 2, 4c. 3, 4d. 1, 4Solution:Answer:(b)Condition for resonance:1. The... View Article
a. 1b. 0c. 2d. 3Solution:Answer:(b)31Ga - 1s2 2s22p63s23p63d104s24p131Ga+ - 1s2 2s22p63s23p63d104s2Since the last electron is in the 4s subshell... View Article
a. Znb. Nic. Cud. FeSolution:Answer:(a)The main impurities in Zn are generally cadmium, lead and iron. There is very little difference in the... View Article