MCQs Chemistry
1: Gibbs free energy , for the reaction at equilibrium , is
A: aero
B: - ve
C: + ve
D: either (b) or (c)
Correct Answer: A
2: A sudden large jump between the values of seconds and third ionization energies of an elements would be associated with which of the following electronic configuration?
A: 1s22s22p63s1
B: 1s22s22p63s13p1
C: 1s22s22p63s2
D: 1s22s22p63s2p2
Correct Answer: C
3: Which of the following is not an acid salt ?
A: NaH2PO2
B: NaH2PO4
C: NaH3PO2
D: none of these
Correct Answer: A
4: In an endothermic reaction, the value of change in enthalpy (H) is
A: Positive
B: Negative
C: Zero
D: Either (b) or (c)
Correct Answer: A
5: C6H5C N + 2 [H] C6H5CHO + NH3
A: Mendius reaction
B: Sendren’s reaction
C: Rosenmund reaction
D: Stephen;s reaction
Correct Answer: D
6: A certain mass of gas occupies a volume of 300 c.c at 270 C and 620 mm pressure, the volume of this gas at 470C and 640 mm pressure will be
A: 310 c.c.
B: 400 c.c.
C: 350 c.c.
D: 510c.c.
Correct Answer: A
7: The reaction C6H6 + CH3CI HCI + C6H5CH3 is called
A: Addition reaction
B: Friedel - Crafts acylation
C: Friedel - Crafts alkylation
D: Friedel - Crafts benzylation
Correct Answer: C
8: C12H22O11 + H2O C6H12O6 (aq) + C6H12O6 (aq). In this reaction, dil. H2SO4 is called
A: Homogeneous
B: Hetrogeneous catalysis
C: Homogeneous catalyst
D: Hetrogeneous
Correct Answer: C
9: The reaction CH3 – Br + 2Na + Br – CH3 the product is called
A: Wurtz reaction
B: Perkin’s reaction
C: Aldol reaction
D: Levit reaction
Correct Answer: A
10: Which of the following electronic configuration is not possible ?
A: 1s22s2
B: 3d104s24p2
C: 1s22s22p6
D: 1s22s22p23s1
Correct Answer: D
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