The smallest particle of a substance is......
  • atom
  • element
  • molecule
  • compound
The short-hand notation of an element is called....
  • formula
  • symbol
  • mark
  • representation
The bonding capacity of an element is called......
  • Atomic number
  • Atomic Mass Unit
  • Molecular mass
  • Valency
"Total mass of the products formed in chemical reaction is exactly equal to the total mass of the reactants present in it." is a .....
  • Law of constant proportion
  • Law of multiple proportion
  • Law of conservation of mass
  • All the above
"In a compound, the elements always present in the fixed ratio of their mass." is a ....
  • Law of constant proportion
  • Law of conservation of mass
  • Law of multiple proportion
  • None of the above
Father of modern chemistry is......
  • Antoine Lavoisier
  • Joseph L Proust
  • John Dalton
  • Rutherford
Who proposed Law of Conservation of mass?
  • Proust
  • Dalton
  • Democrats
  • Lavoisier
Who proposed Law of constant proportion?
  • John Dalton
  • Joseph L Proust
  • Lavoisier
  • Neil's Bohr
The Latin name of water is.....
  • Oxy
  • Hello
  • Hydro
  • none of the above
The symbol of Gold is......
  • G
  • Ag
  • Au
  • Go
Chemical formula of Sodium Carbonate.
  • NaHCO3
  • Na2CO3
  • NaOH
  • Na2SO4
H2SO4 Is the chemical formula of......
  • Hydrogen Chloride
  • Sulfuric acid
  • Nitric acid
  • Carbonic acid
Which of the following is NOT a rule for matter?
  • All matter is made of atoms
  • Atoms bond to other atoms to form compounds
  • Atoms are on the macro scale
  • Atoms last forever
How is matter recycled in ecosystems?
  • Matter can take on different forms as it goes through different processes.
  • Matter moves through ecosystems through biogeochemical cycles.
  • Matter is recycled as organisms in different trophic levels consume and finally when decomposers return matter to the ecosystem.
  • All of these are true.
Animals take in energy as __________ and convert it to ________, the energy cells can use.
  • Fat, ADP
  • Fat, ATP
  • Glucose, ADP
  • Glucose, ATP
What is an element?
  • A pure substance that cannot be broken down.
  • Two atoms bonded together.
  • Two or more different types of atoms bonded together.
  • An molecule with an unequal distribution of charge.
What are atoms composed of?
  • Protons and electrons.
  • Protons, neutrons, and electrons.
  • Neutrons and electrons.
  • Ions, elements, and compounds.
How the sub atomic particles like Proton is different from electron?
  • (a)An electron is much heavier than a proton.
  • (b)An electron carries more charge than a proton.
  • (c) A proton can be easily removed from the atom, but not an electron.
  • (d) A proton is positively charged, whereas an electron is negatively charged
Which of the following is NOT the correct explanation of Thompson’s atomic model?
  • (a)The atom is positively charged sphere.
  • (b)Electrons are embedded in the positive sphere.
  • (c)The positive and negative charges balance each other.
  • (d)Protons and neutrons are embedded in the center of the sphere.
Rutherford conducted an experiment to study the structure of atom. He passedpositively charged alpha particles through a thin gold foil. He studied the angle of deflectionof the alpha particles. He noticed that most of the alpha particles passed through the goldfoil without any deflection. What can be concluded from the observation?
  • (a) Most of the space in an atom is empty.
  • (b) Atoms have electrons, protons, and neutrons.
  • (c) The nucleus of the atom is situated at the center.
  • (d) Atoms do not have positively charged particles.
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