661. Chemical changes are those changes in which:

A.no new substance is formed
B.are mostly reversible
C.new substance is formed *
D.chemical proporties remain unchanged

662. The heat evolved or absorbed during a chemical reaction is knowns as:

A.exothermic
B.endothermic
C.heat of reaction *
D.heat energy

663. The north pole of the magnet is usually coated:

A.black
B.blue
C.red *
D.green

664. Identify part of speech of the word, “frequent”

A.verb
B.adejective
C.pronoun
D.both A and B *

665. You _____ (make) beautiful painting. (Choose the correct form of present perfect tense)

A.you made beautiful painting
B.you have made a beautiful painting *
C.you has made a beautiful painting
D.you have make beautiful painting

666. He is a smart boy (choose the correct plural form of the sentence)

A.he is smart boys
B.they are smart boys *
C.they are smarts boys
D.they are smart boy

667. Someone has removed the grammar book and i want him to return it. (identify the antecedent)

A.someone
B.book
C.i
D.him *

668. Which is the national flower of Iran?

A.lily
B.mountain avens
C.jasmine
D.red rose *

669. The “Kitab-fi-tahqiq’ was written by:

A.firoz shah
B.al-beruni *
C.firozbadi
D.none of these

670. How many white stars are on the flag of Tannessee the states of US?

A.one star
B.two stars
C.three stars *
D.four stars

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