GK for Competitive exams Containing Science Questions:

1--Cow milk is a rich source of —Vitamin B1

2--The element found in the surface of the Moon is--Titanium
3--The average salinity of sea water is--3.5%
4--A super conductor is characterised by--Zero permeability
5--The main constituents of Pearl are--Calcium Carbonate, Magnesium Carbonate
6--An element that does not occur in nature but can be produced artificially is--Plutonium
7--The metallic constituents of hard water are --Calcium, magnesium and iron
8--The property of a substance to absorb moisture from the air on exposure is called--Deliquescene
9---Brass gets discoloured in air due to the presence of which gas in air--Hydrogen Sulphide
10--The high temperature superconductors are--Ceramic oxides
11--The ingredients of Gun metal are--copper (88%), tin (10%), and zinc (2%)
12--The gas usually causing explosions in coal mines is--Methane
13--Cotton fibers are made of --Cellulose