Question: The below given first-order reaction has initial and final moles of PCl5 as 50 and 10 respectively in 120 minutes. Find the rate... View Article
Solution:Answer: 1.096 gLet the weight of NaOH be w1 g and that of Na2CO3 be w2 gThe molar mass of NaOH is 40 g/molMolar mass of Na2CO3 is 106... View Article
Answer: 20 min.[A]t = [A]o / 2n[A]t is the concentration at time t[A]o is the initial concentrationn is the number of half-livesGiven: 1 / 2n = 1... View Article
a. Novolacb. Buna-Sc. Dacrond. PHBVSolution:Answer: (a)Bakelite is formed by cross-linking of novolac and formaldehyde.Hence option (a) is the... View Article
a. Both acidb. Both basec. HNO3: acid and H2SO4: based. HNO3: base and H2SO4: acidSolution:Answer: (d)Nitration using HNO3 and H2SO4 goes by an... View Article
a. sp2, sp, sp3b. sp3, sp, sp3c. sp, sp, sp3d. sp2, sp2, sp3Solution:Answer: (a)To find the number of hybrid orbitals involved in hybridization,... View Article
a. Ammonia gasb. Ethynec. But-2-yned. PropyneSolution:Answer: (c)For reaction with sodium metal, the compound should have acidic hydrogen. Ethyne... View Article
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