neet-2018 Question Bank - Sarthaks eConnect

Which of the followng groups does not represent Boyles law

When concentration approaches zero, the molar conductivity is known as limiting molar conductivity and represented by `Λ_M^0`. Which of the following is correct order of molar conductiivity at infinite dilution ?

An acid-base indicator has a ka of `3×10^(–5)`. The acid form of the indicator is red and the basic form is blue. The change in `H^+` concentration (which is `9×10^(–5)`) in order to change the indicator from 25% red to 75% blue is

For the equilibrium in a closed vessel
`PCl_5(g) ⇌ PCl_3(g) + Cl_2(g)`

`K_P` is found to be double of `K_c`. This attained when

Boron exist in two allotropic forms called amorphous and crystalline forms. Amorphous boron is a brown powder of specific gravity 2.34. The crystalline boron exists in several different modification. The structure of crystalline boron is

Which of the following statement is incorrect

Identify the correct statement regarding enzymes

Alkali metals and alkaline earth metals are s-block elements, electropositive in nature and form electrovalent compounds. Some of such metals are very essential for living organisms. Which of the following is incorrect regarding biological significance of Mg, Ca, Na and K ions

Dihydrogen on the industrial scale is prepared by the water gas shift reaction from petrochemical. It is obtained as a byproduct by the electrolysis of brine. Which of the following is not true regarding hydrogen

Line spectrum of element is unique and there is regulatory in the line spectrum of each element. Which of the following lnie is observed in line spectrum of hydrogen atom

What is the value of de-Broglie wavelength for an aparticle haveing mass `6.6×10^(–27)` kg moving with a speed of 105 cm `s^(–1)`

A compound `Co(en)_2xx(NO_2)_2Cl` exists different isomeric forms (i.e., A, B and C) with the characteristic properties as given below :

`Co(en)_2xx(NO_2)_2Cl`

	Property	A	B	C
(i)	Optical activity	`xx`	`xx`	✓
(ii)	Re action with `AgNO_3`	`xx`	✓	✓
(iii)	Reaction with en	`xx`	`xx`	✓

The strcuture of B is

Wilkinson's catalyst is the first highly active homogenous hydrogenation catalyst. Then, the chemical name of the catalysts

The transition elements vary widely in their chemical behaviour. Many of them are sufficiently electropositive to dissolve in mineral acids, although a few are noble of the first series, except copper, all the metals are relatively reactive. Transition elements show variable valency due to

Using stoichiometric calculation, the amounts of one or more reactant(s) required to produce a particular amount of production can be measured and vice-versa. The amount of substance present in a given volume of solution is expressed in number of ways, e.g., molarity, molality and normality. Noramality of 10%(wt/vol) acetic acid is

Addition of 0.643 g of a compound to 50 mL of benzene (density = 0.879 g `mL^(–1)`), lowers the freezing points from 50.51ºC to 50.03C, If `K_f` for benzene is 5.12, the molecular mass of the compound is

The differential rate law for the reactin

`H_2(g)+I_2(g)⇌ 2HI(g)` is

The relationship between the extent of adsoprtion and pressure of the gas at constant temperature is known as adsorption isotherm. Which of the following is correct regarding adsorption

For a first order chemical reactionk rate constant what found to be `1.15 ×10^(–3) s^(–1)`. How long will it take to reduce 5 g of reactant to 3 g

Minimum amount of work done is required to compress 5.00 mol of an ideal gas isothermally from 200 L to 40 L is

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