The metallic constituents of hard water are
1 Magnesium, calcium and tin
2 Iron, tin and calcium
3 Calcium, ,magnesium and iron
4 None of these
- 1 Answers
- 9320 Views
- I also Faced
- E-Mail Answers
Which type of fire extinguisher is used for petroleum fire? 1 Foam type 2 Soda acid type 3 Powder type 4 None of these
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 which type of rocks re metals like gold and copper mostly found? 1 Old igneous 2 Old sedimentary 3 Old metamorphic 4 New metamorphic
Terls was dedicated to u.n as an international institution?
Why cMadurai is hotter than chennai?
Which of the following gases is used as an illuminant in lamps used by hawkers? 1 Methane 2 Ethylene 3 Acetylene 4 Hydgrogen
The ore of which of the following metals can be concentrated by hydraulic washing? 1 Tin 2 Sodium 3 Iron 4 Manganese
Atoms are composed of 1 Electrons only 2 Protons only 3 Electrons and protons 4 Electrons and nuclei
The final products of combustion of ethane are 1 Carbon and oxygen 2 Ethylene and Hydrogen 3 Water and Carbon monoxide 4 Carbon dioxide and water
Chemical formula for water glass is 1 Na2Sio3 2 Al2O3 3 NaA1O2 4 CaSiO3
Nuclear fission is caused by the impact of 1 Proton 2 Electron 3 Neutron 4 None of these
4 Answers Jharkhand Staff Selection Commission JSSC,
Which scientist made detailed study on novae?
Biological Sciences 
