A wire mesh consisting of very small squares is viewed at a distance of 8 cm through a magnifying converging lens of focal length 10 cm, kept close to the eye. The magnification produced by […]
Borax is used as a cleansing agent because on dissolving in water it gives
Options
(a) alkaline solution (b) acidic solution (c) bleaching solution (d) basic solution
Correct Answer:
alkaline solution
Explanation:
No […]
The Ca²⁺ and F⁻ are located in CaF₂ crystal,respectively at face centred cubic lattic points and in
Options
(a) tetrahedral voids (b) half of tetrahedral voids (c) octahedral voids (d) half of octahedral […]
The enthalphy change for the reaction N₂ + 3H₂ → 2NH₃ is -92.38 kJ at 298K. The internal energy change at 298K is
Options
(a) -92.38 kJ (b) -87.42 kJ (c) -97.34 kJ […]
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