GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 120

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 120

 


1191). Natural rubber is
A). Polymer of ethylene
B). Polymer of butadiene
C). Polymer of acetylene
D). Polymer of 2 methyl butadiene

Answer: Polymer of 2 methyl butadiene


   
1192). Which of the following is correct regarding steel?
A). Iron with > 0.5% carbon
B). Iron with < 0.25% carbon
C). Iron with 0.25 - 2% carbon
D). Iron with 2 - 45% carbon

Answer: Iron with 0.25 - 2% carbon


   
1193). Which is wrongly matched? .
A). Zinc - Enzymes
B). Iron - Haemoglobin
C). Magnesium - Dry cell
D). Beryllium - X ray tubes

Answer: Magnesium - Dry cell


   
1194). The state of matter in their increasing entropy is
A). Solids, Liquids, Gases, BECs
B). Liquids, Gases, BECs, Solids
C). Gases, Liquids, Solids, BECs
D). BECs, Solids, Liquids, Gases

Answer: BECs, Solids, Liquids, Gases


   
1195). Identify the odd one from the group of materials given below:
Glass, ebonite, copper, rubber
A). ebonite
B). copper
C). glass
D). rubber

Answer: copper




1196). The oxidation states of nitrogen in the following equations are:
4[NH3OH]^+ --> N2O + 2NH4^+ + 2H^+ + 3H2O

(X) (Y) (Z)
A). '+1 0 -3
B). '-1 1 -2
C). '-1 -2 -3
D). '-1 1 -3

Answer: '-1 1 -3


   
1197). During the oxidation of acidified ferrous ammonium sulphate with dichromate solution
A). The oxidation number of chromium and iron changes from +6 to +3 and +3 to +2 respectively.
B). The oxidation number of chromium and iron changes from +3 to.+6 and +3 to +2 respectively.
C). The oxidation number of chromium and iron changes from +6 to +3 and +2 to +3 respectively.
D). The oxidation number of chromium and iron changes from +2 to +3 and +6 to +3 respectively.

Answer: The oxidation number of chromium and iron changes from +6 to +3 and +2 to +3 respectively.


   
1198). Consider the following statements:
Assertion (A) : Copper is mainly used in Electrical Engineering Industry.
Reason .(R): Copper has the property of high conductivity.
Now select your answer according to the coding scheme giVen below:
A). Both (A) and (R) are true and (R) is the correct explanation of (A)
B). Both (A) and (R) are true, but (R) does not explain (A)
C). (A) is true, but (R) is false
D). (A) is false, but (R) is true

Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)


   
1199). The conjugate base of [Fe(H2O)6]^+3 is
A). [Fe(H2O)5OH]^+3
B). [Fe(H2O)5OH]^+2
C). [Fe(H2O)5]^+3
D). H2O

Answer: [Fe(H2O)5OH]^+2



   
1200). In the extract of iron haematite ore, the flux added and gangue formed respectively are
A). oxygen, iron oxide
B). carbon dioxide, iron carbonate
C). silica, iron silicate
D). sulphur dioxide, ion sulphate A

Answer: silica, iron silicate