List of top Chemistry Questions

Choose the halogen which is most reactive towards SN1 reaction in the given compounds (A, B, C & D)
halogen which is most reactive towards SN1 reaction
The correct order of spin only magnetic moments for the following complex ions is
An organic compound on combustion gives 0.22 g of CO2 and 0.126 g of H2O. If the percentage of C in given organic compound is 40%, the percentage of H will be?
A metal surface of 100 cm2 area has to be coated with nickel layer of thickness 0.001mm. A current of 2A was passed through a solution of Ni (NO3)2 for 'x' seconds to coat the desired layer. The value of x is_____ (Nearest integer)
 (PNi (density of Nickel) is 10 gmL-1, Molar mass of Nickel is 60 gmol-1 F = 96500 C mol-1)
25.0 mL of 0.050 M Ba(NO3)2 is mixed with 25.0 mL of 0.020 M NaF. Ksp of BaF2 is 0.5 x 10-6 at 298 K. The ratio of [Ba2+] [F-]2 and Ksp is__ (Nearest integer)
Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH2O. The molecular mass of A is ____ g. (Nearest integer)
A2+B2→2AB. \(ΔH^0_f\)= -200 kJ mol-1 AB, A2 and B2 are diatomic molecule. If the bond enthalpies of A2, B2 and AB are in the ratio 1:0.5:1, then the bond enthalpy of A2 is ___ kJmol-1 (Nearest integer)
Match List-I with List-II :
List-I (Species) List-II (Maximum allowed concentration in ppm in drinking water)
AF-I< 50 ppm
B\(SO^{2-}_4\)II< 5 ppm
C\(NO^-_3\)III< 2 ppm
DZnIV< 500 ppm

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A certain quantity of real gas occupies a volume of 30.15 dm3 at 100 atm and 500 K when its compressibility factor is 1.07. Its volume at 300 atm and 300K (When its compressibility factor is 1.4) is _____ x 10-4 dm3 (Nearest integer)
KMnO4 is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute H2SO4. Number of water molecules produced for 2 molecules of KMnO4 is______.
D-(+)- Glyceraldehyde  
The two products formed in above reaction are
Match the following
Column-AColumn-B
 Nylon 6Natural Rubber 
Vulcanized RubberCross Linked 
cis-1,4-polyisopreneCaprolactam 
PolychloropreneNeoprene.

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Left hand side and right hand side rings are named as 'A' and 'B'
In the above reaction. Left hand side and right hand side rings are named as 'A' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:
2-Methyl propyl bromide reacts with C2H5O- and gives 'A' whereas on reaction with C2H5OH it gives 'B'. The mechanism followed in these reactions and the products 'A' and 'B' respectively are
In the following reaction 'X' is
CH3 (CH2)4 CH3 \(\frac{A n h y . A l C l _3 }{HCL\triangle}X\) major product
Which of the following complex is octahedral, diamagnetic and the most stable?

Arrange the following orbitals in decreasing order of energy 
A. $n=3, l =0, m =0$ 
B. $n =4, l =0, m =0$ 
C. $n =3, l =1, m =0$ 
D. $n =3, l =2, m =1$ 
The correct option for the order is :

The mismatched combinations are
A. Chlorophyll - Co 
B. Water hardness - EDTA 
C. Photography - [Ag(CN)2]- 
D. Wilkinson catalyst - [(Ph3P)3 RhCl]  
E. Chelating ligand-D- Penicillamine

Evaluate the following statements for their correctness 
A. The elevation in boiling point temperature of water will be same for $01 \,M \,NaCl$ and $01\, M$ urea 
B. Azeotropic mixtures boil without change in their composition
C. Osmosis always takes place from hypertonic to hypotonic solution 
D. The density of $32 \% H _2 SO _4$ solution having molarity $409\, M$ is approximately $126\, g mL ^{-1}$ 
E. A negatively charged sol is obtained when KI solution is added to silver nitrate solution
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When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of $A$?

ClF5 at room temperature is:
Be(OH)2 reacts with Sr(OH)2 to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
What is the purpose of adding gypsum to cement? 

Given below are two statements : 
Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement II : The green colour observerd is due to the formation of copper(I) metaborate.
In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following represent the Freundlich adsorption isotherms?




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