Section – III
CHEMISTRY
Q). The bond angle in C2H2 molecule is
A) 109°28’
B) 120°
C) 180°
D) 107°
Q). Esters are derivatives of
A) ketones
B) alcohols
C) ethers
D) carboxylic acids.
Q). The name of the structure CH3 – CH = CH2 is
A) butene
B) buta-1, 2-diene
C) butadiene
D) 1, 3 – butadiene
Q). Which of the following organic compounds undergoes substitution reaction
A) Alkanes
B) Alkenes
C) Alkynes
D) All
Q). When dilute hydrochloric acid is added to iron fillings
A) hydrogen gas and iron chloride are formed
B) chlorine gas and iron hydroxide are formed
C) no reaction takes place
D) iron salt and water are produced
Q). pH scale is introduced by
A) Sorensen
B) Mosley
C) Schrodinger
D) C.V. Raman
Q). Which principle states that “No two electrons of the same atom can have all the four quantum numbers the same”?
A) Pauli’s
B) Aufbau
C) Hund’s
D) Bohr’s
Q). The coordination number of Na+ in NaCl is
A) 3
B) 4
C) 5
D) 6
Q). Who proved that ‘vital force theory’ is not correct?
A) Berzelius
B) Linus Pauling
C) Wohler
D) Dalton
Q). Which of the following reactions is exothermic reaction?
A) C + O2 —> CO2
B) N2 + O2 -> 2NO
C) 2AgCl-> 2Ag + Cl2
D) Zn + 2HCl -> ZnCl2+H2