Recently Active Chemistry Questions

Multiple Correct Answer type . The standard enthalpy change of formation of Al2O3(s) is −1669 kJ mol−1 and the standard enthalpy change of formation of Fe2O3(s) is −822 kJ mol−1. (a) ∆Hο for the following reaction. ...

WHICH OF THE FOLLOWING HAS HIGHER BOILING POINT? (a)p-nitrophenol (b)o-nitrophenol give explanation.......i am bit confused ...

ASSUME THAT A PARTICULAR AMINO ACID HAS AN ISOELECTRIC POINT OF 6.0 .IN A SOLUTION OF Ph 1.0 WHICH OF THE FOLLOWING SPECIES WILL PREDOMINATE ?????? *Image* ...

GIVE THE FINAL PRODUCT *Image* ...

Vapour density of PCl5 is 104.16 but when heated to 230°C its VD is reduced to 62. The degree of dissociation of PCl5 at this temp = (a) 6.8% (b) 68% (c) 46% (d) 64% ...

Arrange in increasing order of complex forming tendency: Ca2+, Fe2+, Fe3+, Cr2+ ...

PhMgBr + PCl3 ---------> ??? i remember 3 options only,,they were -- a. chlorobenzene. b. dichlorobenzene. C. bromobenzene. ...

Which statements are correct ? (a) H2 at 25°C in a volume of 50L has the higher energy per mol of substance than H2 at 25°C in a volume of 10 L . (b) O2 at 25°C and 1 atm has the higher energy per mol of substance than O2 ...

Please read the paragraph carefully and answer the following questions with proper explanations. A student was investigating the speed of reaction between limestone granules and different concentrations of hydrochloric acid. ...

Question. TRUE/FALSE The chlorination of *Image* yields 2,2-chloro propane as major product. answer- false EXPLAIN HOW??? ...

the pH of a solution is 0.1 M NaA and 0.1M HA ( Ka = 1 x 10^-6) would be : a)5 b)6 c) 3 d) 7 detailed answer shall be appreciated ....... ...

*Image* my actual doubt : do we hav dese above mentioned name reacns in JEE syllabus ??? ...

Aqueous silver nitrate is treated with successive additions of: (i) an excess of aqueous potassium chloride; (ii) an excess of aqueous ammonia; (iii) an excess of aqueous potassium bromide. Which of the following diagrams rep ...

Ehylene glycol (HOCH2CH2OH) is a low volatility liquid commonly sold as antifreeze to be mixed with water in car radiators. By adding a nonvolatile solute to the water in the radiator, not only is the freezing point of the re ...

*Image* Based on this above graph , the correct answers are (a) At point ‘A’ ∆G° becomes O for the reaction. (b) Below point A magnesium can reduce alumina above this point. Aluminium can reduce magnesium oxide. (c) Mo ...

NiO is to be reduced to Ni in an industrial process by the use of the reaction NiO(s) + CO(g) ----Ni(s) + CO2(g) at 1600 K the equilibrium constant for the reaction is 600 . if CO pressure of 150mmHg is to be employed in the ...

T/F 1)Molar heat capacity of H2O in equlibrium with at constant pressure is inifnity 2) At constant pressure of 1atm,ice is in equilibrium with water ...

Question. The number of monochloro derivative of isobutane is ???? answer given is 4................but mine 2 came............Can someone explain?? ...

What shud be the major products "A" & "B" in the foll. simple cases....? *Image* (P.S. I know, too simple, ...yet, awaiting replies to clear the confusion once n fr all [1]) ...

Q. Correct order of bond length is (a) CO>CO+ (b) NO+ > NO (c) N2>N2+ (d) O2+>O2 ans: (a) ...

Why is Finkelstien reaction not reversible? ...

whats the order of basic nature of the compounds NF3,PF3,AsF3,SbF3,BiF3 ? And why ? ...

single choice correct Q1 WHich pair can form alloy ? a)Zn,Pb b)Fe,Hg c)Fe,C d)C,Pt Q2 consider [Ag(NH3)2]+,[Ag(CN)2]-,[Ag(S2O3)2]3- Which of the following are true abt these ?? a)Ag+ acts as lewis base b)hybd of Ag+ is sp2 c) ...

Q1 which is not covalent a)CO2 b)SiO2 c)BaO d)CsNO3 Q2 In SiO2 what is coordination no. of Si and O ?? Q3 **deleted ** Q4 The [1 1 1] plane is parallel to which plane in 3D space ? Q5 Find miller indices of plane with interce ...

these are ques to which i dont have answers Write the all possible names of following compounds 1)K3[Co(NO2)6] a)Fischer salt b)potassium cobaltnitrite c)potassium hexanitrocobaltate(III) d)potassium cobalt nitrite 2)Na2[Fe(C ...

The following curve is obtained when molar conductivity (â‹€m) is plotted against the square root of concentration for two electrolytes A and B. *Image* then ,correct answers are (a) B is a strong electrolyte and A is a weak ...

T/F Q1 Lithium is st. reducing agent among alkali metals Q2 BeF2 has highest MP among flourides of 2nd gp.\ more than one correct Q3 ionic oxides having NCl type strucutre and 6:6 cooridnation ar ?? a)SrO b)CaO c)BeO d)MgO Is ...

Complexes in which two metals of different oxidation state are close together are frequently highly coloured.Why? ...

Multiple answers correct. Select out the correct Statement(s) - *Image* ...

1) An Alcohol , on oxidation produces a ketone with the same number of carbon atoms. When the Ketones is oxidized, it yields am acid with a fewer no. of carbon atoms. The alcohol could be:- (a) Primary alcohol (b) Secondary a ...