Q. Elements with the same atomic number but different mass numbers are called:
The correct answer was: Isotopes
Q. Elements A, B, C, and D have atomic numbers 12, 13, 15, and 3, respectively. Which element cannot form a cation?
The correct answer was: C
Q. Which of the following combinations gives a displacement reaction?
The correct answer was: Solution of AgNO₃ and copper metal
Q. Which of the following has the highest number of bonding electrons?
The correct answer was: P
Q. An element reacts with oxygen to form a compound with a high melting point and is soluble in water. The element is
The correct answer was: Ca
Q. The functional group of aldehyde is
The correct answer was: -CHO
Q. The number of electrons in a sulfide ion (S²⁻) is:
The correct answer was: 10
Q. The compound that participates in an addition reaction is
The correct answer was: H-CEC-H
Q. The important component group of organic compounds is:
The correct answer was: Group 14
Q. Alkene is also known as
The correct answer was: Olefin
Q. Which of the following is an ore of aluminum?
The correct answer was: Bauxite
Q. Which of the following compounds has a polar covalent bond?
The correct answer was: H₂O
Q. Which of the following is vinegar?
The correct answer was: CH₃COOH
Q. Elements with a single valency electron:
The correct answer was: Can be either metals or non-metals
Q. Which of these is an inorganic compound?
The correct answer was: KCl
Q. Which of the following elements has the largest atomic radius?
The correct answer was: K
Q. The IUPAC name of the compound CH₃-O-C₂H₅ is
The correct answer was: Methoxyethane
Q. The general formula for alkane is
The correct answer was: CnH₂n+2
Q. A compound with the same molecular formula but different structural formula is called
The correct answer was: Isomerism
Q. Which of the following is sodium peroxide?
The correct answer was: Na₂O₂
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