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

111) Solution with pH less than 7 is

A) Sodium chloride solution
B) Sodium hydroxide solution
C) Acetic acid solution
D) Slaked line

View Answer
C) Acetic acid solution

Explanation:pH < 7 = acidic → only acetic acid solution

112) In endothermic reaction, hear is

A) released
B) not changes
C) absorbed
D) all of the above

View Answer
C) absorbed

Explanation:Endothermic = heat absorbed

113) One mole of Propane (C3H8) on combination given ‘x’ kilo joules at STP. Heat liberated by the combustion of 11.2 litres of Propane at STP in kilo joules is

A) X
B) \frac X2
C) 11.2X
D) 2X

View Answer
B) \frac X2

Explanation:1 mole = 22.4 L → 11.2 L = 0.5 mol → Energy = X/2

114) A Na+BH2O→CNaOH2+DH2, in this equation the values of A,B,C and D are

A) A=1,B=1,C=2,D=1
B) A=2,B=2,C=2,D=1
C) A=1,B=1,C=1,D=1
D) A=2,B=1,C=2,D=1

View Answer
B) A=2,B=2,C=2,D=1

Explanation:Balanced equation: 2Na + 2H₂O → 2NaOH + H₂
A=2, B=2, C=2, D=1

115) Compound formed when excess CO2 is passed through lime water

A) Ca(OH)2
B) CaCO3
C) Cao
D) Ca(HCO3)2

View Answer
D) Ca(HCO3)2

Explanation:Excess CO₂ + lime water → Ca(HCO₃)₂
Ca(HCO₃)₂

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