Sea water is saltier than rain water because:
[A] Sea animals are salt producing
[B] The air around the sea is saltish
[C] Rivers wash away salts from earth and pour them into the sea
[D] Sea beds have salt producing mines
[B] The air around the sea is saltish
[C] Rivers wash away salts from earth and pour them into the sea
[D] Sea beds have salt producing mines
Submitted by :- Muhammad Nawaz
Which of the following metal is most ductile in nature?
[A] Copper
[B] Silver
[C] Gold
[D] Aluminum
[B] Silver
[C] Gold
[D] Aluminum
Submitted by :- Muhammad Nawaz
Which of the following metals has least melting point?
Which of the following is not a greenhouse gas?
[A] Water vapour
[B] O2
[C] O3
[D] CO2
[B] O2
[C] O3
[D] CO2
Submitted by :- Muhammad Nawaz
Which chemical law proposes that ‘soft drinks and soda bottles are sealed under high pressure to increase the solubility of CO2’?
[A] Raoult’s law
[B] Henry’s law
[C] Ohm’s law
[D] Dalton’s law
[B] Henry’s law
[C] Ohm’s law
[D] Dalton’s law
Submitted by :- Muhammad Nawaz
A battery converts which energy to electrical energy?
[A] mechanical
[B] chemical
[C] light
[D] heat
[B] chemical
[C] light
[D] heat
Submitted by :- Muhammad Nawaz
Which is one of the most important technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates?
[A] Filtration
[B] Distillation
[C] Evaporation
[D] Chromatography
[B] Distillation
[C] Evaporation
[D] Chromatography
Submitted by :- Muhammad Nawaz
The atoms of the elements having same difference between mass number and atomic number are called:
[A] Isobar
[B] Isotopes
[C] Isotones
[D] None of the above
[B] Isotopes
[C] Isotones
[D] None of the above
Submitted by :- Muhammad Nawaz
Who formulated “the atomic theory” of a matter?
[A] Avogadro
[B] Dalton
[C] Newton
[D] Pascal
[B] Dalton
[C] Newton
[D] Pascal
Submitted by :- Muhammad Nawaz