In winter an iron pipe feel colder than a wooden window This is because wood is_______
(A) Conductor
(B) Non-Conductor
(C) Semi- Conductor
(D) Not a solid while iron is a solid
(D) None of these
Water is heated in a kettlE The inside water is heated by convection A person sitting near the fire receives heat by ________
(A) Conduction
(B) Convection
(C) Radiation
(D) Reflection
(D) None of these
Name the famous book of Ibn_Sina in which he discussed human physiology and medicine
(A) Al-Qanun
(B) Al-Masudi
(C) New Renaissance
(D) Tadhkira
(D) None of these
In a railway track, two rails are joined end to end with a gap tin between them because
(A) Steel can be saved
(B) Accidents due to contraction in winter can be avoided
(C) Air gaps are necessary for bearing the weight of running train
(D) Accidents due to expansion in summer can be avoided
(D) All of these
Animal which captures and readily kills living animals for its food is called___________
(A) Parasite
(B) Scavenger
(C) Predator
(D) Mammal
(D) None of these
The fruits without seed, like banana, are called_____________
(A) Seedless fruits
(B) Parthenogenesis fruits
(C) Parthenocarpic fruits
(D) placental fruits
(D) Organic fruits
Quartz crystal in quartz watches work on the principle called
(A) Photoelectric effect
(B) Stark effect
(C) Thermionic effect
(D) Piezo-electric effect
(D) None of these
Oasis is associated with___________
(A) Glaciers
(B) Desert
(C) Islands
(D) Volcanoes
(D) Fertile land
Yeast is used in making bread because it produces____________
(A) Carbon dioxide
(B) Sugar
(C) Bacteria
(D) Oxygen
(D) None of these
The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from____________
(A) Ionosphere
(B) Troposphere
(C) Mesosphere
(D) Stratosphere
(D) None of these