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Tuesday, 1 November 2016

ICSE CHEMISTRY - PRACTICE PAPER 1

ICSE CHEMISTRY - PRACTICE PAPER 1

a) Choose the suitable word to fill in the blanks.                                                                       5M
(Electron affinity, descreases, increases, valence, Ionisation potential, electron)
_______(i)_______ is the amount of energy required to remove one ____(ii)______ from the valence shell of an isolated gaseous atom. This property _____(iii)____ across a period from left to right due to the ______(iv)______ nuclear attraction force on the __(v)____ electrons.
b)   Match the following.                Example-   vi-G                                                                   5M


Part-A
i)   An alkali metal
ii)  The element with highest E.A value
iii) The element with highest E.N value
iv) An organic acid
v)  Acid used in eye wash
vi) A strong acid



Part-B
A) Chlorine
B) Acetic acid
C) Boric acid
D) Sodium
E) Fluorine
F) Calcium
G) Sulphuric acid




c) Select the correct answers from the words given below:                                                     10M
i)           The number of valence electrons present in an alkali metal is:
A) 1                                 B) 2                                C) 3                          D) 4
ii)         The noble gas which belongs to period 2 is:
A)Helium                        B) Argon                        C) Krypton               D) Neon
iii)       The elements with stable electronic configuration:
A) Alkali metals              B) Alkaline earth metals   C) Halogens          D) Inert gases
iv)       The basicity of Hydrochloric acid
A) 4                                 B) 2                                C) 1                          D) 3
v)         The gas which has rotten egg smell
A) H2S                             B) HCl                           C) Cl2                       D) SO2




vi)       Which of the following statements is not true:
A) Carbon belongs to period 2
B) Helium is not a halogen
C) Oxygen has two valence electrons
D) Calcium is an alkaline earth metal
vii)     An acid used in food preservation
A) Tartaric acid               B) Citric acid                 C) Carbonic acid      D) Boric acid
viii)   The gas which turns lime water milky but has no effect on acidified K2Cr2O7 :
A) H2                               B) SO2                            C) CO2                     D) Cl2
ix)       The gas released when a dil. acid is added to an active metal:
A) Hydrogen                   B) Oxygen                     C) Chlorine              D) Fluorine
x)         Which of the following is not an oxy acid:
A) HNO3                         B) H2SO4                       C) HCl                     D) H2SO3
d) Fill in the blanks:-                                                                                                                  5M
i)        A metal is an element which _______________(loses/gains) electrons.
ii)      Atomic radius ________________(increases/decreases) across a period from left to right.
iii)    _______________(Noble gases/Halogens) do not lose or gain electrons.
iv)    HCl is a/an __________________( covalent/electrovalent) compound.
v) Hydrogen chloride gas reacts with Iron to form _____________(FeCl2/FeCl3)

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