Chemistry FUN Quiz: Question Preview (ID: 3938)

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What colour would the precipitate formed be if a few drops of Aqueous Ammonia is added to solution Zinc Nitrate?
a) No precipitate formed.
b) White precipitate formed.
c) Blue precipitate formed,
d) Red-brown precipitate formed.

A few drops of aqueous Sodium Hydroxide is added to a testtube of Iron(II) Nitrate solution and was left standing at the table for a few minutes. What is the precipitate's colour?
a) Red-Brown
b) Green
c) White
d) Blue

A colourless pungent gas evolved upon warming after aqueous Sodium Hydroxide was added to a solution of aqueous Ammonium Sulfate. What is the gas that evolved?
a) Sulfur Dioxide
b) Methane
c) Hydrogen
d) Ammonia

Dilute Nitric Acid is added to Solution X, followed by aqueous Silver Nitrate. It is observed that there is a white precipitation forming. What could X possibly be?
a) Silver Chloride
b) Sodium Chloride
c) Copper (II) Sulfate
d) Ammonium Sulfate

Aqueous Ammonia is added to Solution Y and the resulting precipitate is found to be insoluble in excess Aqueous Ammonia . What could Solution Y possibly be?
a) Lead(II) Nitrate and Aluminium Carbonate
b) Lead(II) Sulfate and Aluminium Nitrate
c) Zinc Nitrate and Lead(II) Chloride
d) Lead(II) Nitrate and Aluminium Sulfate

Uranium exists commonly as Uranium-235 and Uranium-238. These are called isotopes. What would clearly define an isotope?
a) An isotope has the same number of proton and electrons but different number of neutrons.
b) An isotope has the same number of nucleons but different number of electrons.
c) An isotope has the same number of neutrons and electrons but different number of protons.
d) An isotope has the same number of neutrons but different number of electrons and protons.

Francium reacts vigorously with water to produce a strong alkaline solution. What would the formula of francium hydroxide most probably be?
a) FrOH
b) Fr2OH
c) Fr(OH)2
d) Fr(OH)3

Which of the following would give a half-filled set of p-orbital if an electron is removed?
a) C
b) O
c) S
d) P

4. Which of the following would have the highest chances of forming a 2+ ion?
a) 1s22s22p63s23p3
b) 1s22s22p63s23p1
c) 1s22s22p63s23p64s2
d) 1s22s22p63s23p64s1

What would the electronic configuration of Ar3+?
a) [Ne] 3s2 3p3
b) [Ne] 3s2 3p6
c) [Ne] 3s2 3p1
d) [Ne] 3s2 3p4

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