TS Polycet (Polytechnic) 2015 Previous Question Paper with Answers And Model Papers With Complete Analysis

Section – III
CHEMISTRY

Q). 6.023 x 10²² molecules of N₂ at STP will occupy a volume of
A) 22.4 litres
B) 2.24 litres
C) 6.02 litres
D) 14 litres

Q). For the reaction A + 2B → C, 5 moles of A and 8 moles of B will produce
A) 5 moles of C
B) 4 moles of C
C) 8 moles of C
D) 13 moles of C

Q). If a solution turns blue litmus to red, then its pH is likely to be
A) 5
B) 8
C) 10
D) 12

Q). When Zn is added to aqueous NaOH and on heating it forms
A) ZnO
B) Na₂ZnO₂
C) O₂
D) Na₂O

Q). Which one of the following is an acid?
A) Nacl
B) Ca(OH) ₂
C) HNO₃
D) NaNO₃

Q). The chemical formula of Plaster of Paris is
A) A) CuSO₄. 5H₂O
B) CaSO₄. H₂O
C) CuSO₄. ½ H₂O
D) CaSO₄. ½ H₂O

Q). The orbital which does not-lie along the axis is
A) P_X
B) d_X²– _y²
C) d_Xy
D) p_y

Q). Which one of the following has the electronic configuration of ls²2s²2p⁶?
A) Ne
B) Na⁺
C) F^–
D) All

Q). When an electron jumps from higher orbit to lower orbit in an atom, the energy is
A) absorbed
B) emitted
C) not changed
D) Depends on atom

Q). Magnetic quantum number of the last electron of the sodium is
A) 3
B) 2
C) 1
D) 0