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

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91)Which of the following is a non metal?

A) Pb

B) Sn

C) K

D) S

View Answer

D) S
Explanation:Sulphur (S) is a non-metal

92)Which of the following process is used for the purification of crude metal?

A) Roasting

B) Poling

C) Calcination

D) Froth flotation

View Answer

B) Poling
Explanation:Poling is used to purify crude metals (especially copper)
Poling

93)Which one of the following metal occurs in the native form?

A) Au

B) Ca

C) Mg

D) Na

View Answer

A) Au
Explanation:Gold (Au) occurs in native form (elemental state)

94)The more reactive metal in the activity series is

A) Potassium

B) Zinc

C) Iron

D) Platinum

View Answer

A) Potassium
Explanation:Potassium is at the top of the reactivity series
Potassium

95)The carbonate ore among the following is

A) Bauxite

B) Magnesite

C) Haematite

D) Carnalite

View Answer

B) Magnesite
Explanation:Magnesite (MgCO₃) is a carbonate ore
Magnesite

96)Identify an acidic flux among the following

A) SiO₂

B) CaO

C) MgO

D) CaCO₃

View Answer

A) SiO₂
Explanation:Silicon dioxide (SiO₂) is an acidic flux
SiO₂

97)Which of the following electronic configuration violating Hund's rule?

A) A

B) B

C) C

D) D

View Answer

D) D
Explanation:Hund's Rule violation: two electrons in same orbital before all orbitals filled

98)The classification of elements which is based on atomic number is

A) Dobereiner's law of Triads

B) Newland's law of octaves

C) Modern periodic table

D) Mandeleeff's periodic table

View Answer

C) Modern periodic table
Explanation:Classification based on atomic number = Modern Periodic Table
Modern periodic table

99)Four quantum numbers of valence electron of sodium

A) 3,0,0,+½

B) 2,1,0,-½

C) 3,0,-1,+½

D) 2,0,0,-+½

View Answer

A) 3,0,0,+½
Explanation:Sodium (Na): 1s² 2s² 2p⁶ 3s¹ → n=3, l=0, m=0, s=+½
3,0,0,+½

100)Which of the following electromagnetic radiation has more frequency?

A) Cosmine rays

B) X-rays

C) U.V. rays

D) Radio waves

View Answer

A) Cosmine rays
Explanation:Cosmic rays have highest frequency among options
Cosmic rays

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