AP Polycet (Polytechnic) 2022 Previous Question Paper with Answers And Model Papers With Complete Analysis

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Polycet Mock Test

106) Which of the following periodic classification is not based on the atomic weights of elements?

A) Dobereiner’s law of triads
B) Newlands law of octaves
C) Mendeleev periodic table
D) Modern periodic table

View Answer
D) Modern periodic table

Explanation:Modern periodic table is based on atomic number, not atomic weight.
Answer:Modern periodic table

107) An element with atomic number 14 has a valency of

A) 1
B) 2
C) 4
D) 3

View Answer
C) 4

Explanation:Atomic number 14 → Silicon (Si) → configuration: 2, 8, 4 ⇒ valency = 4
Answer:4

108) What is the family name of VII A group elements?

A) Alkali earth metals
B) Alkali metals
C) Chalcogens
D) Halogens

View Answer
D) Halogens

Explanation:Group VIIA elements (F, Cl, Br, etc.) are known as halogens.
Answer:Halogens

109) Which type of bond is formed due to transfer of electrons between two dissimilar atoms?

A) Electrovalent bond
B) Electrostatic bond
C) Ionic bond
D) All of these

View Answer
D) All of these

Explanation:Ionic (electrovalent) bond forms by transfer of electrons between atoms of different electronegativity. All given terms refer to this.
Answer:All of these

110) Which of the following is correct regarding the melting points of ionic, polar covalent and non-polar covalent compounds?

A) Polar covalent > ionic > non-polar covalent
B) Ionic > Polar covalent > non-polar covalent
C) Ionic > non-polar covalent > polar covalent
D) All have same melting point

View Answer
B) Ionic > Polar covalent > non-polar covalent

Explanation:Ionic > Polar covalent > Non-polar covalent in terms of melting point, due to strong electrostatic forces in ionic compounds.
Answer:Ionic > Polar covalent > non-polar covalent

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