Carbon, diamond and graphite are together called
1 Isomers
2 Allotropes
3 Isomorphs
4 Isotopes
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how is rrb model question paper for science junior engineer gr.II
Which of the following minerals has the lower numerical hardness value? 1 Talc 2 Gypsum 3 Apatite 4 Topaz
Label the following types of erosion in order by their ability to transport materials. Wind erosion, water erosion, glacial erosion, plant/animal erosion.
A substance which changes readily into vapor without heating is called 1 Efflorescent 2 Synthetic 3 Volatile 4 Effervescent
The disease that is caused by viral infection is
What are pulsars?
The human skull rests on which bone? a)Manubrium b)Atlas c)Mandible d)Sternum
The ore of which of the following metals can be concentrated by hydraulic washing? 1 Tin 2 Sodium 3 Iron 4 Manganese
define cartography?
The location and energy of an electron in an atom can be specified by 1 Atomic mass 2 Atomic number 3 Quantum numbers 4 None of these
‘Saponification involves the hydrolysis of fats and oils by 1 Water 2 Washing soda 3 Stearic acid 4 Caustic soda
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide