chemistry Question Bank - Sarthaks eConnect

Which is not applicable to `N_2O_4`

The strongest acid among the following aromatic compounds is

In reversible reaction,the initial concentration of A and B are a and b in molesper litre and the equilibrium concentration are (a – x) and (b + x) respectively. The expression of x in terms of `k_1, k_2`, a and b is

For the preparation of nitrosyl chloride from NO and `Cl_2` a mechanism involving steps has been proposed.

Step `I : NO(g) -> Cl_2 (s) ->NOCl_2(g)`
Step `II : NOCl_2 (g) + NO(g) ->2NOCl(g)`

Rate law for the reaction is Rate `= k[NO][Cl_2]` The rate limiting step for this reaction is

In a reaction A `->` products, the rate is doubled when the concentration of A is increased 4 times. If 50% of the reaction occurs in 1414s. How long would it take for the completion of 75% reaction

The concentraton of `Ag^+` in a saturated solution of AgCl was found to be `10^(–5)` mol `L^(–1)`. At the same temperature the concentration of `Ag^+` in a 0.01 M Sodium chloride solution saturated with AgCl will be

The cryoscopic constant of water is 1.86 A 0.01 molal acetic acid solution produces a depression of 0.0193 ºC in the freezing point. The degree of dissociation of acetic acid is

Which are the species in which sulphur undergoes `sp^3` hybridisation ?
`I. SF_4 II. SCl_2 III. SO_4^(2–) IV. H_2S`

How many electron(s) in an atom can have n = 3, m = 2

Which one of the following acts as an initiator in a polymerization reaction

The reaction of m-bromoanisole with `NaNH_2` in liquid ammonia yields

Consider the following statements concernig diborane. Which are correct :–

I. There is a free roation about B—B axis

II. All the H atoms are bonded to B atoms in a similar way.

III. Its final hydrolysis products are hydrogen and boric acid

IV. It forms addition compounds with ammonia

During the extraction of iron from haematite, limestone is added to the blast furnace to

Which one among the following exhibits optical isomerism

Of which of the followig colloidal systems, fog is an example

CsBr and CsCl belong to bcc lattice. If the densities of CsBr and CsCl are equal, then the ratio of edge length of CsBr to CsCl will be (At. mass of Cs = 133, Br = 80, Cl = 35.5)

A cell `Ag|Ag^+||Cu^(2+)|Cu` contains 2 M `Ag^+` and 2M `Cu^(2+)` ions. The change in cell potential after the passage of 10 A current for 4825 s is

The angular momentum of an electron in a Bohr's orbti or `He^+` is `3.1652 × 10^(–34)` kg-`m^2`/s. What is the wave number in terms of Rydberg constant (R) of the spectral line emitted when an electron falls from this level to the excited sate ? (Use h = `6.626×10^(–34)` J-s]

What are the products formed when `Li_2CO_3` undergoes decomposition

An ethanol water mixture has density 1.025 g/mL and it is 8.0 M in ethanol. Molality of this solution with respect to ethanol is

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