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List of atoms and molecules Questions
|1||11. Which of the following is a symbol of palladium|
Which of the following are acidic radicals?
The atomicity of an element tells about its
(a) chemical properties
(b) physical properties
(c) number of atoms of element present in a molecule
(d) none of these
Which of the fo11 wingi neithor an element nor a
|4||Assertion : The molecular mass of NaOH is 40.|
Reason: The molecular mass of a compound is defined as
the sum of the atomic weights of all the constituent atom
present in a molecule.
|5||In which of the following compounds phosphorus (P) has|
(d) None of these
|6||Q6. Write formulas for the following compounds:|
(a) Mercury (II) chloride, (b) Nickel (II) sulphate, (c) Tin (IV) oxide, (d) Thallium
(1) sulphate, (e) Iron (III) sulphate, Chromium (III) oxide.
What is the valency of sulphur in sulphur dioxide (SO )?
How many times greater is the valency of N in NH2 than
that of Cl in HCI?
Which of the following is / are bivalent radicals2
|10||12. Hg is a symbol of|
|11||What is the valency of the underlined elements in following|
AgI, Mg2N,, NaCl, CaCl2
|12||Which of the following ion is divalent?|
|13||3. Calculate the sum of the valencies of Helium, Phosphorus|
Calculate the sum of the valencies of Helium, Phosphorus
|14||An atom X has a mass that is four times that of carbon|
atom. What mass of X will combine with 1.00 g of
carbon in forming the compound X,C?
(a) 1.00 g
(b) 2.00 g
(c) 4.00 g
(d) 8.00 g
|15||44. ‘Atomic theory of matter was|
(1) Avogadro (2) Dalton
(3) Newton (4) Pascal
14. The noble gases or rare gases exist as
(c) Tri – atomic C (d) Tetra – atomic
|17||18. Chemical formula of Aluminium sulphate is|
(d) None of the above
The formula of sodium pyrophosphate is
(a) Na, P. O.
(b) Na PO
(d) Na PO,
Which one of the following information is conveyed by the
symbol of an element?
(a) The name of the element
(b) The atomic mass of the element
(c) The atomic number of the element
(d) All the above
|20||Which one is a bivalent ion?|
(d) both (b) and (c)
|21||16. Which one of the given respons-|
es would be a meaningful order
of the following in ascending or-
3. molecule 4. electron
(1)41 32 (2)3 1 42
(3)3 4 12 (4) 1 2 3 4
Select the polyatomic elements.
Atomicity of Phosphorous
What is the valency of Carbon in CH,
CVI CVECE vul Reason 15 CUT.
Assertion : The combining capacity of an atom or radical is
known as its valency.
Reason: The valency of an element is always a whole
|27||10. Molecular weight of water is|
(a) 16 amu
(c) 10 amu
(b) 12 amu
(d) 18 arnu
|28||Chemical formula gives information about|
(a) which elements are present in compound
(b) physical properties of compound
(c) nature of compound
(d) total number of atoms of each element present in
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