ICSE CHEMISTRY - PRACTICE PAPER 3

ICSE CHEMISTRY - PRACTICE PAPER 3

a)      Arrange the following elements according to the description given in brackets.

i)        K, Na, Li, Cs( decreasing order  of their atomic radius)

ii)      Mg, Na, Al, Cl, S (increasing order of their Electronegativity)

b)      State how the following periodic properties change across a period from left to right

i)        Electronegativity                               ii) Electron affinity

c)      i) Metals are electropositive/electronegative in nature.

ii) Alkaline earth metals are monovalent/ divalent in nature.

d) Study the following table and answer the questions given below.

Group No.à	IA 1	IIA 2	IIIA 13	IVA 14	VA 15	VIA 16	VIIA 17	VIIIA 18
Period No.
2	A		D			F	Y
3		B			E			T
4			G			Q	P

i)  Identify the Noble gas from the given table.

ii)      What type of bond is formed between A and Q?

iii)    State the formula of the compound formed between B and Y.

iv)    The formula of a compound formed between X and P is XP₃ then write the formula of the oxide formed by the element X.