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)