Welcome to Sarthaks eConnect Question Bank
Practice Online Test Series for JEE Main 2018 & NEET 2018
The alkali metals dissolve in liquid `NH_3`, it is found that
`NH_3 + H_2O + CO_2 -> A;A + H_2O + CO_2 -> B`
`B +NaCl -> C +NH_4Cl ; C overset{triangle}{rightarrow} D + H_2O + CO_2`
Incorrect statements is:
Which of the following is not correct reagarding Li and Mg?
For gaseous phase equilibrium `PCl_(5(g)) ⇌ PCl_(3(g)) + Cl_(2(g)),` the equilibrium partial pressures of `PCl_5, PCl_3` and `Cl_2` are 10 atm, 6 atm and 7 atm respectively in a 5L container. At constant temperature if we decrease the volume of the container to 2.5 L then which of the following is correct
`CaCO_3` is heated is a closed container, an equilibrium is attained at TK. The equilibrium amount of `CaCO_3` can be increased by
For the reaction `CO_(g) + 2H_(2(g)) ⇌ CH_3OH_(g)`. hydrogen gas is introduced into a 2.5 litre container along with 0.2 moles of CO at `327^oC`. At equilibrium 0.1 moles of `CH_3OH` is formed and total pressure is 9.84 atm, What percentage of `H_2` gas reacts at equilibrium
The solubility of `Li_3Na_3(AlF_6)_2` is 0.0744 g per 100 ml at 298 K. Calculate the solubility product of the salt. (Atomic masses: Li = 7, Na = 23, Al = 27, F = 19)
Aqueous solution of NaOH, HCl, HCN and KCN of identical concentration are provided. By which of the following pair of solutions a buffer solution can be prepared
The solubility product constants (Ksp) of the salts of types `AB_2, A_3B` and `A_2B_3` are `3.2 xx 10^(-14), 2.7 xx 10^(-15)` and `1.08 xx 10^(-23)`. Respectively. The order of their solubilities at same temp is
25 ml of 0.2 M of a weak monoacidic base is titrated with 0.1 M solution of HCI at `25^oC`. What will be `H^+` concentration at equivalence point `(k_(b(NH_4OH)) = 1xx10^(-12), K_(w(H_2O)` at `25^oC = 1.0 xx 10^(-14))`
The valnes for vander waal's constants a and b for the gases X, Y and Z are given below
A
B
X
1.36
0.002
Y
4.20
0.007
Z
2.5
0.006
Which gas is most difficult of liquify
The average kinetic energy (in Joule) per molecule in 32g of methane at `127^oC` is
The maximum number of atoms present in one plane in `B_2H_6` molecule are
In a discharge tube, there are only three hydrogen atoms. If the electrons in all three atoms are de-excited from 4th orbit, the minimum and maximum number of spectral lines should, respectively be
At a given temperature, the pH value of pure water is 6.5, it will be
The time period of revolution on the third orbit of `Li^(+2)` ion is T seconds. The time period of revolution in the fourth orbit of `Be^(+3)` is
Consider the following balanced chemical reaction
`6 KMnO_4 + 10FeC_2O_4 + 24H_2SO_4 -> 3K_2SO_4 + 6MnSO_4 + 20CO_2 + 5Fe_2(SO_4)_3 + 24 H_2O`
The equivalent mass of `H_2SO_4` in the reaction is
The radial wave equation for hydrogen atom is
(A) `psi=1/(16sqrt4)(1/a_0)^(3/2)[(x-1)(x^2-8x+12)]e^(-x/2)`
Where `x=(2r)/a_0; a_0=` radius of first Bohr orbit
The minimum distance of radial node from the nucleus is
No of moles of electrons donated by one mole of `Fe_2S_3` in the following reaction `Fe_2S_3 -> FeSO_4 + SO_2`
Two substances, 'A' and ‘B' are initially present as `[A_o] = 8[B_o]` and `t_(1/2)` for the first-order decomposition of ‘A’ and ‘B' are 10 and 20 min, respectively. If they start decomposing same time, after how much time, the concentration of both of them would be same?
