111) What is the hybridization in H2O molecule?
A) sp3
B) sp
C) sp2
D) sp3d
View Answer
A) sp
3
Explanation:Water (H₂O) has two lone pairs on oxygen, leading to a bent shape.
The hybridization is sp³ (4 electron domains around oxygen).
Answer:sp³
112) Which among the following theories explained both shape and strength of the bond in covalent compounds?
A) Electronic theory of valence
B) Valence shell electron pair repulsion theory
C) Valence bond theory
D) All of the above
View Answer
C) Valence bond theory
Explanation:Valence Bond Theory (VBT) explains both bond strength and shape via orbital overlap.
Answer:Valence bond theory
113) Highest abundant metal in earth’s crust is
A) Al
B) Au
C) N2
D) Fe
View Answer
A) Al
Explanation:The most abundant metal in Earth’s crust is aluminium (Al).
Answer:Al
114) Which of the following is not a sulphide ore?
A) Pyrolusite
B) Galena
C) Cinnabar
D) Copper iron pyrites
View Answer
A) Pyrolusite
Explanation:Pyrolusite (MnO₂) is an oxide ore, not a sulphide.
Answer:Pyrolusite
115) Which of the following ores undergoes roasting?
A) Carbonate ores
B) Oxide ores
C) Sulphide ores
D) All of these
View Answer
C) Sulphide ores
Explanation:Roasting is mainly used for sulphide ores, converting them into oxides.
Answer:Sulphide ores
