Question

i)Which one of the following has smallest size?
A) Al
B) Al+
C)Al2+
D) Al3+

ii) An element with atomic number 8 resembles with an element having atomic number :
A)7
B) 16
D) 26
C )35

iii) Amongst lithium, sodium, potassium and rubidium, the most electropositive metal is
A) Sodium
B) Lithium
C)Rubidium
D) Potassium

iv) Amongst the following, which is not a polar covalent compound?
A) NH3
B) H2S
C) HI
D) CCl4​

v) During the electrolysis of copper sulphate solution,the mass of anode gradually :
A) Increases
B) Decreases
C) Remains same
D) None of these

Answer 1

1)Ans:Al3+ 2)Ans:7 3) Ans;:sodium 4)Ans:Decreases

Answer 2

Answer: Here's your answer!!!!

Explanation: The answer of first part is Al3+ because atom with higher no. of positive charge us smallest in size as Al3+ has only two shells.

The answer of second part is

16 because atomic number 8(oxygen) and atomic number 16(Sulphur) are in same group 16.

The answer of third part is Rubidium as electropositive character increases down the group.

The correct answer would be NH3 as difference in electronegativity of nitrogen and hydrogen is not so much.

The answer of last part is mass of anode decreases as copper gradually deposits on cathode.

Hope it helps!!!