Q : How many carbon atoms are joined in buckminsterfullerene?
(A) 30
(B) 90
(C) 60
(D) 120
Which of the given metals cannot be extracted using smelting?
(A) Fe
(B) Al
(C) Zn
(D) Pb
Which of the following is an oxidising agent ?
(A) KMnO4
(B) K2 Cr2 07
(C) HNO3
(D) All of the above
Identify the man - made element
(A) Carbon
(B) Gold
(C) californium
(D) calcium
Which gas is released when water is mixed with lime?
(A) Oxygen
(B) Carbon dioxide
(C) Hydrogen
(D) Helium
What color does blue litmus paper turn into?
(A) White
(B) Red
(C) Black
(D) Violet
What is the hearing capacity of a human being?
(A) 20 Hz to 2000 Hz
(B) 20 Hz to 20000 Hz
(C) More than 20000 Hz
(D) 200 Hz to 20000 Hz
The atomic mass of an element has the maximum number of electrons in its second orbit—
(A) 2
(B) 8
(C) 10
(D) 16
The basis of classification of elements in modern periodic table is based on___.
(A) Atomic number
(B) Atomic mass
(C) Atomic volume
(D) Atomic density
The halogen used as an analgesic is-
(A) Chlorine
(B) Bromine
(C) Iodine
(D) Fluorine
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