MCQ-6
The melting and boiling point of silicon is highest in the 3rd period. This is because of
A. Non-metallic nature
B. Giant covalent structure
C. Semi-conductor property
D. Most abundant in nature
Answer: B
MCQ-7
When one mole of aluminium is reacted with excess steam, it produces a mole of hydrogen gas.
A. 1/2
B. 2/3
C. 3/2
D. 5/2
Answer: C
MCQ-8
Which of the following element in reaction with oxygen produce ionic oxides?
A. Na
B. Mg
C. Ca
D. All of these
Answer: D
MCQ-9
Which of the following oxide will produce a solution with the highest pH value?
A. Na₂O
B. MgO
C. Al2O3
D. SO3
Answer: A
MCQ-10
The electronegativity value of group IA decreases from top to bottom due to
A. Reactivity decrease
B. Increase in size
C. Decrease in density
D. Increase in I.E
Answer: B
