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TS Polycet (Polytechnic) 2019 Previous Question Paper with Answers And Model Papers With Complete Analysis

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101)The Ionization energy of Beryllium is more than that of Boron, because Beryllium has…..

A) more nuclear charge

B) less screening effect

C) more penetration power of ‘2s’ than ‘2p’

D) more atomic radius

View Answer

C) more penetration power of ‘2s’ than ‘2p’

102)The element with highest electronegativity among the following is

A) ‘O’

B) ‘N’

C) ‘C’

D) ‘B’

View Answer

A) ‘O’

103)Which of the following is smallest size cation?

A) Na⁺

B) K⁺

C) Mg²⁺

D) Al³⁺

View Answer

D) Al³⁺

104)In a Dobereiner’s triad, the atomic weight of first and third elements are ‘7’ and ’39’ respectively. What is the atomic weight of middle element?

A) 14

B) 20

C) 23

D) 46

View Answer

C) 23

105)Which of the following is called as ‘electron deficient molecule?

A) BF₃

B) CH₄

C) H₂O

D) NH₃

View Answer

A) BF₃

106)Covalent bond is absent in

A) H₂O

B) HCl

C) Na₂O

D) NH₃

View Answer

C) Na₂O

107)Which of the following Anions has Ne configuration?

A) Cl^–

B) O^2-

C) P^3-

D) Br^–

View Answer

B) O^2-

108)The bond angle in BeCl₂ molecule is

A) 109°28′

B) 120°

C) 180°

D) 104°31’

View Answer

C) 180°

109)An example for polar covalent bond is

A) H-H

B) H-Cl

C) Cl-Cl

D) F-F

View Answer

B) H-Cl

110)Which one of the following is correct statement in case of covalent compounds?

A) These are crystalline solids

B) These are soluble in non-polar solvents

C) Their reactions are very fast

D) They have high m.p. and b.p.

View Answer

B) These are soluble in non-polar solvents

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