Welcome to Sarthaks eConnect Question Bank
Practice Online Test Series for JEE Main 2018 & NEET 2018
Assertion : The photochemical reactions `H_2 + Cl -> 2HCl` and `H_2 + Br_2 -> 2HBr` have equal quantum efficiencies.
Reason : Both the reactions proceed by similar mechanism.
Asseriion : If the activation energy of a raction is zero, temperature will have no effect on the rate constant.
Reason : Lower the activation energy, faster is the reaction
Assertion : The decomposition of bezene diazonium chloride is pseudounimolecular reaction
Reason : The molecularity of reaction is two but follows first order reaction
On passing 0.1 Faraday of electricity through aluminium chloride, the amount of aluminium metal deposited on cathode is (Al = 27)
The odour from a gas A takes six seconds to reach a wall from a given point. If the molecular weight of gas A is 46 gram per mole and the molecular weight of gas B is 64 grams per mole. How long will it take for the odour from gas B to reach the same wall from the same point approximately
Naturally occuring chlorine is 75% `Cl^35` which and 25% `Cl^37`. Calculate the average atomic mass of chlorine
In two separate experiments equal quantities of an alkyl halide, `C_4H_9Cl` were treated at the same temperature with equal volume of 0.1 molar and 0.2 molar solutions of NaOH respectively. In the two experiments, the times taken for the reaction of exactly 50% of the alkyl halide were the same. The most likely structure of halide is
Lanthanoids ion which is most likely to be reduced by Cr(+II) is
When `NH_3` is treated with HCl, state of hybridisation on central nitrogen
Pick out incorrect statement
Which one of the following does not dissolve in conc. `H_2 SO_4`
When propyne is treated with aqueous `H_2SO_4` in the presence of `HgSO_4` , the major product is
If the edge-length of the unit cell of sodium chloride is 600 pm, and the ionic radius of `Cl^–` ion is 190 pm, then the ionic radius of `Na^+` ion is
A metal ion from the first transition series has a magnetic moment (calculated) of 2.83 BM. How many unpaired electrons are expected to be present in the ion
How much time is required for complete decoposition of two moles of water using a current of 2 ampere ?
End product of the following sequence of reaction of
Heating an ore in the absence of air below its melting point is called
The density of a solution containing 13% by mass of sulphuric acid is 1.09 g/mL. Calculate the molarityof the solution
`Cu^+ + e^– -> Cu, Eº = x_1 V`,
`Cu^(+2) + 2e^– -> Cu, Eº = x_2 V`
For `Cu^(+2) + e ^– ->Cu^+, Eº` will be
Which of the following is not an electrophile
