Atoms of an element differ from those of all other elements in
1 Atomic number and electronic configuration
2 Atomic number and number of valence electrons
3 Number of neutrons and electronic configuration
4 None of these
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Enriched uranium used in a nuclear reactor is 1 Uranium freed of all impurities 2 Uranium treated with radiation 3 Uranium alloyed with aluminum 4 Uranium with a high percentage of a particular isotope
difference between ancient age,middle age & modern age.
How long can arihant stay underwater?
Which of the following metals was first discovered by man? 1 Bronze 2 Silver 3 Iron 4 Copper
which among the followings is found chlorophyll ?
Emerald is ----in colour 1 Violet 2 Yellow 3 Deep green 4 Prussian blue
Of the following metals which, one pollutes the air of a big city? 1 Copper 2 Chromium 3 Lead 4 Cadmium
3 Answers HCL, High Court, SSC,
Which one is having more weight when compare to diesel to petrole?
Marsh gas is 1 Hydrogen 2 Nitrogen 3 Methane 4 Ethane
A moderator is used in nuclear reactors in order to 1 Increase the number of neutrons 2 Decrease the number of neutrons 3 Slow down the speed of neutrons 4 Accelerate the neutrons
What is the Organic Evolution ?
the colour of a star is an indication of its?