Which of the following is an endothermic reaction ?
Assertion (A) : A catalyst increases the rate of a reaction.Reason (R) : In presence of a catalyst, the activation energy of the reaction increases. The correct answer is
Which of the following is not correct
Which of the following is not correct
CH2=CH2+HCl→CH3CH2Cl is an example for
Which of the following is not correct regarding the properties of ionic compounds ?
Which of the following statements is correct
Which one of the following pairs of reactants does not form oxygen when theyreact with each other
Observe the following statements :I. Bleaching powder is used in the preparation of chloroform.II. Bleaching powder decomposes in the presence ofCoCl2 to liberate 02.III.Aqueous KHF2 is used in the preparation of fluorine.The correct combination is :
List-I
List-II
List-III
CH3COONa
Alc.KOH
Ethylene
CHCl2-CHCl2
H2O
Acetylene
C2H5MgI
NaOH+CaO
Methane
CH3-CH2Cl
Zn dust
Ethane
The correct match is
Which of the following statements is NOT correct?
Average C-H bond energy is 416 kJ. mol-1. Which of the following is correct ?
Observe the following statements :I. The physical and chemical properties of elements are periodic functions of their electronic configuration.II. Electronegativity of fluorine is less than the electronegativity of chlorine.III. Electropositive nature decreases from top to bottom in a group.The correct answer is :
Which of the following is correct