A. it is used in smaller amount
B. decrease activation energy
C. specific in action
D. it affects specific rate constant
Related Mcqs:
- In base catalyzed reaction of carbonyl compound the catalyst___________________?
A. increases the nucleophilic character of reagent
B. increases electrophilic character of carbonyl compound
C. acidic character of reagent
D. both a and b - Which of the following is incorrect statement about nitrogen importance ?
A. It enhances plant growth
B. It is involved in the synthesis of protein and nucleic acids
C. it accelerates fruits and flowers growth
D. It is involved in the chlorophyll synthesis - Which of the following option is incorrect about gases ?
A. All molecules move with same speed
B. All molecules behave independently
C. PV / RT = n
D. All gases cannot be liquefied through Linds Method - Which of the following statements is incorrect about fluorine_______________?
A. fluorine is restricted to -1 oxidation state
B. fluorine follows octet rule and as well as extended octet rule
C. fluorine has lowest dissociation energy among the halogens
D. both B and C - Which of the following statements is incorrect about halogens ?
A. All are non-metals
B. All the halogens have electronic conviguration ns2p5
C. They have high electron attinity and ionization energy
D. All the halogens react with noble gases to form their halides - Which statement is consistent with Hunds rule ?
A. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.
B. The electrons in the same atom cannot have the same four quantum numbers
C. There is maximum of two electrons is an orbital.
D. None - In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true ?
A. n2a/v correct for the intermolecular forces.
B. nb correct for the volume occupied by gas molecules.
C. at high densities the equation reduces to the ideal gas law
D. all of the above statements are correct. - Which of the following statement is correct ?
A. size of Cl atoms > Cl- ion
B. size of Na+ ion < Na atom
C. size of Na atom < Na+ ion
D. Cl- < Na+ - Which one of the following statement is not correct about benzene ?
A. On hydrogenation 208 KJ/mole is liberated
B. C-H bond length in benzene is 1.09 A?
C. Molecular mass of benzene is 78.108
D. Resonance energy of benzene is 150.5 K Cal/mole - Identify the correct statement regarding CO_______________?
A. it combines with H2O to form carbonic acid
B. it reacts with red blood cells of haemoglobin
C. it is powerful oxidizing agent
D. it is used to prepare aerated drinks
