Which of the following materials is an example of an amorphous solid
\r\n","choices":[{"text":"Glass
\r\n","value":"A"},{"text":"Ice
\r\n","value":"B"},{"text":"Diamon
\r\n","value":"C"},{"text":"Sodium Chaloride
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066184,"question":"amorphous solids are typically
\r\n","choices":[{"text":"Rigid and hard
\r\n","value":"A"},{"text":"Found in lump or fine powder form
\r\n","value":"B"},{"text":"Have a shrp melting point
\r\n","value":"C"},{"text":"Always crystalline in structure
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066183,"question":"The shape in which a crystal usually grows is called its.
\r\n","choices":[{"text":"Habit
\r\n","value":"A"},{"text":"Crystal lattice
\r\n","value":"B"},{"text":"Melting Point
\r\n","value":"C"},{"text":"Cleavage plane
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066182,"question":"When a crystalline solid is broken, it does so along specific planes, Theseplanes are kown as.
\r\n","choices":[{"text":"Cleavage planes
\r\n","value":"A"},{"text":"Crystal faces
\r\n","value":"B"},{"text":"Surface planes
\r\n","value":"C"},{"text":"Growth planes
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066181,"question":"Which of the following is a charcteristic of cyrstalline solids.
\r\n","choices":[{"text":"They do not have a definite geometrical shape
\r\n","value":"A"},{"text":"They melt over a wide temerature range
\r\n","value":"B"},{"text":"They have asharp melting point
\r\n","value":"C"},{"text":"Their properties do not depend on the directionof measurement
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066180,"question":"In Solids the particles miainly have which type of motion
\r\n","choices":[{"text":"Translatory motion
\r\n","value":"A"},{"text":"Vibratory motion
\r\n","value":"B"},{"text":"Rotatray motion
\r\n","value":"C"},{"text":"Random Motion
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066179,"question":"What happens to the particles in a solid when the temperature increases.
\r\n","choices":[{"text":"They move closer to each other
\r\n","value":"A"},{"text":"Their vibrational motion increases
\r\n","value":"B"},{"text":"They start moving freely
\r\n","value":"C"},{"text":"The solid melts
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066178,"question":"Why is the compression of solids not possible
\r\n","choices":[{"text":"The particles are fixed in place and cannot move closer
\r\n","value":"A"},{"text":"Their particles are widely spaced
\r\n","value":"B"},{"text":"The partiles are charged
\r\n","value":"C"},{"text":"Solids are made of gases
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066177,"question":"How does heat of vaporization affect matter.
\r\n","choices":[{"text":"Cause decrease in kinetic energy
\r\n","value":"A"},{"text":"Incresses particle motion and separes tham into gas phase
\r\n","value":"B"},{"text":"Decresease freedom of particles
\r\n","value":"C"},{"text":"Strengthens intermolecular forces
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066176,"question":"Which of the followng has the lowest molar hat of vaporization.
\r\n","choices":[{"text":"HCl
\r\n","value":"A"},{"text":"Water
\r\n","value":"B"},{"text":"NH3
\r\n","value":"C"},{"text":"Ethanol
\r\n","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1066175,"question":"What is the role of a pressur ecooker in boiling water.
\r\n","choices":[{"text":"It lowers atmospheric pressure
\r\n","value":"A"},{"text":"It allows water to evaporate quickly
\r\n","value":"B"},{"text":"It increases external pressure raising boiling point
\r\n","value":"C"},{"text":"It cools the steam
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066174,"question":"Why does water boil at 69 oC on Mount Everest
\r\n","choices":[{"text":"Due to hgih temperature
\r\n","value":"A"},{"text":"Due to low vapour pressure
\r\n","value":"B"},{"text":"Due to low external pressure
\r\n","value":"C"},{"text":"Due to presence of snow
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066173,"question":"What is the effect of decresing external pressur eon boiling point of a liquid.
\r\n","choices":[{"text":"It increases
\r\n","value":"A"},{"text":"It remains constant
\r\n","value":"B"},{"text":"It decrease
\r\n","value":"C"},{"text":"It fluctuates
\r\n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1066172,"question":"When does a liqudi start boiling.
\r\n","choices":[{"text":"When temperatur reahes 100 oC
\r\n","value":"A"},{"text":"When its vaporu pressur eequals atmospheric pressure
\r\n","value":"B"},{"text":"When all molecules turn into vapour
\r\n","value":"C"},{"text":"When surface tension becomes zero
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066171,"question":"Why does aceton feel colder than water when pured on skin.
\r\n","choices":[{"text":"It absorb moisture
\r\n","value":"A"},{"text":"It has lower boiling point and evaporates faster
\r\n","value":"B"},{"text":"It rreacts with skin
\r\n","value":"C"},{"text":"It is more viscous
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066170,"question":"Why does acetone feel colder than water when poured on skin.
\r\n","choices":[{"text":"It reacts with skin
\r\n","value":"A"},{"text":"It has lower boiling point and evaporate faster
\r\n","value":"B"},{"text":"It is more viscous
\r\n","value":"C"},{"text":"It absorbs moisture
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1066169,"question":"At equilibrium in a closed system, which two processes occur at tha same rate.
\r\n","choices":[{"text":"Mellting and Freezing
\r\n","value":"A"},{"text":"Evporation and condensation
\r\n","value":"B"},{"text":"Sublimation and condensation
\r\n","value":"C"},{"text":"Evaporation and boiling
\r\n","value":"D"},{"value":"E"}],"correctAnswer":2}]