For the reaction: C2H6→ C2H4 + H2 : The reaction enthalpy
For the reaction: C2H6→ C2H4 + H2 : The reaction enthalpy ΔrH = __________ kJ mol–1. (Round off to the... View Article
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For the reaction: 2Fe3+ (aq) + 2I– (aq) → 2Fe2+ (aq) + I2(s)
For the reaction: 2Fe3+ (aq) + 2I– (aq) → 2Fe2+ (aq) + I2(s) The magnitude of the standard molar free... View Article
2NO (g) + Cl2 (g) → 2 NOCl (s): This reaction was studied at – 100C and the following data was obtained.
2NO (g) + Cl2 (g) → 2 NOCl (s): This reaction was studied at – 100C and the following data... View Article
A reaction of 0.1 mole of Benzyl amine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide.
A reaction of 0.1 mole of Benzyl amine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide. The number... View Article
_____ grams of 3-Hydroxy propanal (MW = 74) must be dehydrated to produce 7.8 g of acrolein (MW = 56) (C3H4O) if the percentage yield is 64. (Round off to the Nearest Integer).
[Given: Atomic masses: C : 12.0 u, H : 1.0 u, O : 16.0 u] Answer: 16 7.8/ 56 =... View Article
AX is a covalent diatomic molecule where A and X are second-row elements of the periodic table.
AX is a covalent diatomic molecule where A and X are second-row elements of the periodic table. Based on Molecular... View Article
The total number of unpaired electrons present in the complex K3[Cr(oxalate)3] is
Answer: (3) K3[Cr(ox)3] Chromium & in + 3 oxidation state Cr → 3d5 4s1 Cr3+ → 3d3 3 unpaired electron the... View Article
2 molal solution of a weak acid HA has a freezing point of 3.885 oC.
2 molal solution of a weak acid HA has a freezing point of 3.885 oC. The degree of dissociation of... View Article
Match List-I with List-II:
Match List-I with List-II: List-I (Process) List-II (Catalyst) (a) Deacon’s process (i) ZSM-5 (b) Contact process (ii) CuCl2 (c) Cracking... View Article
A non-reducing sugar ”A” hydrolyses to give two reducing monosaccharides. Sugar A is
a. Glucose b. Fructose c. Sucrose d. Galactose Answer: (c) C12H22O11 + H2O → C6H12O6 + C6H12O6 Sucrose D-glucose D-fructose... View Article
Reaction of Grignard reagent, C2H5MgBr with C8H8O followed by hydrolysis
Reaction of Grignard reagent, C2H5MgBr with C8H8O followed by hydrolysis gives compound “A” which reacts instantly with Lucas reagent to... View Article
Considering the below reaction, X and Y respectively are
Solution: Option d is the answer.
Considering the below chemical reaction, identity the product “X”
Considering the below chemical reaction, identity the product “X”: Solution: hence option c is the answer
The chemical is added to reduce the melting point of the reaction mixture during the extraction of aluminium is:
a. Cryolite b. Calamine c. Kaolite d. Bauxite Answer: (a) For reducing the melting point of Alumina, Cryolite i.e. Na3AlF6... View Article
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion... View Article
Consider the above chemical reaction and identity product “A”
Consider the above chemical reaction and identity product “A”: Solution: Option c is the answer.
A certain orbital has no angular nodes and two radial nodes. The orbital is:
a. 2p b. 3p c. 2s d. 3s Answer: (d) No angular nodes ⇒ ℓ = 0 Radial nodes =... View Article
The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is
a. 3 b. 1 c. 0 d. 2 Answer: (d) PCl3 + H3PO3 +H2O → H4P2O5 + HCl pyrophosphorous acid The... View Article
Match List-I with List-II:
Match List-I with List-II: List-I List-II (a) Chlorophyll (i) Ruthenium (b) Vitamin – B12 (ii) Platinum (c) Anticancer drug (iii)... View Article
The correct structures of trans-[NiBr2(PPh3)2] and meridional-[Co(NH3)3(NO2)3] respectively are:
The correct structures of trans-[NiBr2(PPh3)2] and meridional-[Co(NH3)3(NO2)3] respectively are: Solution: Option b is the answer.
