The presence of which of the following salts in water causes
corrosion in steam boilers?
1 Sodium chloride
2 Magnesium chloride
3 Calcium bicarbonate
4 Potassium bicarbonate
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The average salinity of sea water is 1 2% 2 2.5% 3 3% 4 3.5%
Heavy water is 1 Sea water (H2O+Salt) 2 D2O 3 H2O2 4 None of these
Which of the following metals react with nitrogen at room temperature to form nitride? 1 Sodium 2 Potassium 3 Magnesium 4 None of these
In which of the following processes light energy is converted into chemical energy? 1 Respiration 2 Fermentation 3 Photosynthesis 4 Photoresiration
If today is Saturday what day will it be from 500 days?
Chemical change does not take place in case of 1 Souring of milk into curd 2 Rusting of iron in atmosphere 3 Burning of magnesium ribbon in air 4 emitting of light by a red hot platinum wire
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A man is travelling with the speed of 10m/min across the river to the opposite bank.The river water flows at the speed of 1m/s.Since the water flows at the speed higher than the boatsman, he would definitley reach the opposite river bank in a slant path.What is the length of the path he travelled?. The river is 10m wide. Please give me solution to tha above probelm. Thanks in advance
what is defination of conductivity? How much conductivity of water ? what is effect when conductity of water low or high?
the river tigris in which city
The main important feature of neutron bomb is that when it is dropped on a city, it would damage 1 Both the living organisms and buildings 2 The buildings but not the living organisms 3 The living organisms but spare buildings 4 None of these
3 Answers GTY, Indian Railways, Option 3, RRB, RRC Railway Recruitment Cell,
Biological Sciences 
