0.005M K2Cr2O7 solution for calibration of UV.why 0.005M
K2Cr2O7?
Potassium permanganate is used for purifying drinking water, because 1 It is dissolves the impurities of water 2 It is a sterilizing agent 3 It is an oxidizing agent 4 It is a reducing agent
Which of the following alloys is used for making magnets? 1 Duralumin 2 Stainless steel 3 Alnico 4 Magnalium
What are cosmic rays?
define cartography?
Which synthetic fiber possesses a ‘drip-dry’ property? 1 Rayon 2 Nylon 3 Silk 4 Terylene
The vast resources of unutilized natural gas can be used in the production of 1 Graphite 2 Fertilizers 3 Synthetic petroleum 4 Carbide
WHY WE SMELL A SCENT AFTER RAIN?? BUT RAIN WATER IS PUREST FORM OF WATER WHICH IS ODOURLESS.
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,
In which year was the meteorology department founded?
Who commanded the challenger’s first flight?
Which of the following metals can displace hydrogen from dilute acids? 1 Zinc 2 Gold 3 Copper 4 Silver
The ratio of pure gold in 18 carat gold is 1 60% 2 75% 3 80% 4 100%
3 Answers DSSSB-Delhi Subordinate Service Selection Board,