3056: Which one of the following is used as an explosive?
(a) Nitroglycerine
(b) Phosphorus trichloride
(c) Mercuric oxide
(d) Graphite
3057: Which one of the following satisfies the relationship
D d a : a D D : : R r b : ?
(a) D D A
(b) R R R
(c) b R R
(d) B B r
3058: Which one of the following ports shown on the rough outline map of India is a riverine port ?
(a) 1
(b) 2
(c) 3
(d) 4
3059: Which one of the following figures will generate a cone when rotated about one of its straight edges ?
(a) An equilateral triangle
(b) A sector of a circle
(c) A segment of a circle
(d) A right-angled triangle
3060: Latvia does not share its borders with which one of the following countries?
(a) Russia
(b) Estonia
(c) Lithuania
(d) Poland