Of the following metals which, one pollutes the air of a big
city?
1 Copper
2 Chromium
3 Lead
4 Cadmium
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Find the odd one: 1 Marble 2 Chalk 3 Limestone 4 Slaked lime
Titanium is purified by 1 Zone refining 2 Electrolysis 3 Van Arkel method 4 Hydraulic washing
What is the microbiology ?
Which of the following is not a neutral oxide? 1 Carbon monoxide 2 Sulphur dioxide 3 Nitric oxide 4 Water
Why sun seems to be a red colour while sun-rising and sun- setting?
Which isotope of Uranium is capable of sustaining chain reaction ?
Which of the following gases is not known as green house gas? 1 Carbon dioxide 2 Methane 3 Nitruous oxide 4 Hydrogen
4 Answers ACIO, Infosys, ptet,
Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 Lime 4 Potassium permanganate
The two elements that are frequently used for making transistors are 1 Boron and aluminium 2 Silicon and germanium 3 Iridium and tungsten 4 Niobium and columbium
In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
What is the Metabolism ?
How many naval staffs can occupy arihant?