Chemistry MSc

Q: Oxides of Be,Al, Bi and Zn are in nature:

(a) :  acidic
(b) :  basic
(c) :  amphoteric
(d) :  super
(e) :  None of the Above
Answer:  acidic
Explanation:  

Q: Pair of element belonging to group III-A?

(a) :  Al & Ca
(b) :  B & Be
(c) :  Ga & Ge
(d) :  In & Te
(e) :  None of the Above
Answer:  In & Te
Explanation:  

Q: Trend of electron affinity is:

(a) :  Increases in period and groups
(b) :  decreases in period and groups
(c) :  First increases and than decreases in a group
(d) :  Always increases in a group and
(e) :  None of the Above
Answer:  Always increases in a group and
Explanation:  

Q: Oxidation state of an element is represented by its:

(a) :  group number in periodic table
(b) :  valence electrons
(c) :  no of vacancies in valence electrons
(d) :  all above are correct
(e) :  None of the Above
Answer:  all above are correct
Explanation:  

Q: Mendeleev gave his periodic law in the year:

(a) :  1829
(b) :  1864
(c) :  1871
(d) :  1913
(e) :  None of the Above
Answer:  1871
Explanation:  

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