Gate Way To CGL Mains : General science Quiz

1. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
A.bromine
B.fluorine
C.chlorine
D.sulphur

2. The element common to all acids is
A.hydrogen
B.carbon
C.sulphur
D.oxygen

3. Non stick cooking utensils are coated with
A.Teflon
B.PVC
C.black paint
D.polystyrene

4. Monazite is an ore of
A.titanium
B.zirconium
C.iron
D.thorium

5. Carbon, diamond and graphite are together called
A.allotropes
B.isomers
C.isomorphs
D.isotopes

6. Potassium nitrate is used in
A.medicine
B.fertiliser
C.salt
D.glass

7. Permanent hardness of water may be removed by the addition of
A.sodium carbonate
B.alum
C.potassium permanganate
D.lime

8. Soda water contains
A.carbonic acid
B.sulphuric acid
C.carbon dioxide
D.nitrous acid

9. The most important ore of aluminium is
A.galena
B.calamine
C.calcite
D.bauxite

10. Most soluble in water is
A.camphor
B.sulphur
C.common salt
D.sugar

Answers:-
1.d
2.a
3.a
4.d
5.a
6.b
7.a
8.c
9.d
10.d