List of top Chemistry Questions

Consider the above reaction, and choose the correct statement : 

 

Match List - I with List - II : 

Choose the correct answer from the options given below : 
 

Match List - I with List - II : 

Choose the correct answer from the options given below : 
 

10.0 mL of 0.05 M KMnO$_4$ solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is ________ $\times 10^{-2}$ g/L. (Round off to the Nearest Integer).
The dihedral angle in staggered form of 1,1,1-Trichloro ethane is ________ degree. (Round off to the Nearest Integer).
Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :
The equilibrium constant for the reaction
A(s) $\rightleftharpoons$ M(s) + $\frac{1}{2}$O$_2$(g)
is K$_p$=4. At equilibrium, the partial pressure of O$_2$ is ________ atm. (Round off to the Nearest Integer).
2SO$_2$(g) + O$_2$(g) $\rightarrow$ 2SO$_3$(g)
The above reaction is carried out in a vessel starting with partial pressures P$_{SO_2}$ = 250 m bar, P$_{O_2}$ = 750 m bar and P$_{SO_3}$ = 0 bar. When the reaction is complete, the total pressure in the reaction vessel is ________ m bar. (Round off to the Nearest Integer).
To an aqueous solution containing ions such as Al$^{3+}$, Zn$^{2+}$, Ca$^{2+}$, Fe$^{3+}$, Ni$^{2+}$, Ba$^{2+}$ and Cu$^{2+}$ was added conc. HCl, followed by H$_2$S.
The total number of cations precipitated during this reaction is/are :
Number of Cl=O bonds in chlorous acid, chloric acid and perchloric acid respectively are :
The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :
The CORRECT order of first ionisation enthalpy is :
If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been :
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : SO$_2$(g) is adsorbed to a larger extent than H$_2$(g) on activated charcoal.
Reason R : SO$_2$(g) has a higher critical temperature than H$_2$(g).
In the light of the above statements, choose the most appropriate answer from the options given below.
Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solids are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of temperatures.
(E) Amorphous solids have a definite heat of fusion.
Choose the most appropriate answer from the options given below :
The addition of silica during the extraction of copper from its sulphide ore

Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-bromo benzoic acid. The percentage yield of the product is _________. (Round off to the Nearest Integer). [Given : Atomic masses : C : 12.0 u, H : 1.0 u, O : 16.0 u, Br : 80.0 u]

Consider the above reaction, the product 'X' and 'Y' respectively are 

Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are :

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag(NH₃)₂]⁺ per aldehyde group to form silver mirror is __________. (Round off to the Nearest Integer).
The solubility of CdSO₄ in water is 8.0 × 10^{-4} mol L^{-1}. Its solubility in 0.01 M H₂SO₄ solution is ________ × 10^{-6} mol L^{-1}. (Round off to the Nearest Integer). (Assume that solubility is much less than 0.01 M)
A xenon compound 'A' upon partial hydrolysis gives XeO₂F₂. The number of lone pair of electrons present in compound A is _________. (Round off to the Nearest Integer)
The gas phase reaction 2A(g) ⇌ A₂(g) at 400 K has ΔG° = +25.2 kJ mol⁻¹. The equilibrium constant K_p for this reaction is _________ × 10^{-2}. (Round off to the Nearest Integer). [Use : R = 8.3 J mol⁻¹ K⁻¹, ln 10 = 2.3, log₁₀ 2 = 0.30, 1 atm = 1 bar, antilog (-0.3) = 0.501]
Deficiency of vitamin K causes :
10.0 mL of Na₂CO₃ solution is titrated against 0.2 M HCl solution. The following titre values were obtained in 5 readings: 4.8 mL, 4.9 mL, 5.0 mL, 5.0 mL and 5.0 mL. Based on these readings, and convention of titrimetric estimation the concentration of Na₂CO₃ solution is ________ mM. (Round off to the Nearest Integer).