The substances that reduces the effectiveness of a catalyst are called ___________________?
(A) Promoters
(B) Poisoning catalysts
(C) Inhibitors
(D) pro-catalysts
Greater the conc. Of reactant__________________?
(A) Greater will be dx/dt
(B) Lesser will be dx/dt
(C) dx/dt will be moderate
(D) any of above
Which one of the following sets consists of all coinage metals ?
(A) Cu Hg Au
(B) Cu Ag Au
(C) Ag Au Hg
(D) Cu Fe Au
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
(A) Both are electropositive
(B) Similar outer most shell electronic configuration
(C) Both form ionic compounds
(D) All
Non-metals usually form _________________ oxides?
(A) Acidic
(B) Amphoteric
(C) Neutral
(D) All of the above
Inner transition elements are called _________________?
(A) Lanthanides
(B) Actinides
(C) Rare earth metals
(D) All
In modern periodic table all the leements are arranged in ascending order of__________________?
(A) Valency
(B) Atomic mass
(C) Atomic number
(D) Valence electrons
Elements with similar chemical properties appear in the_________________?
(A) Same family
(B) Same period
(C) p block elements
(D) Right upper corner
Concept of Triads was introduced by_______________?
(A) Dobereiner
(B) Newland
(C) Mendeleev
(D) Al-Razi