GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 037

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 037

361). Match list I and list II and choose the best below given options
ListI(Compounds of nitrogen)      List II(Valency)
(A)N2O                                                1
(B) NO                                                2
(C)N2O5                                               3
(D)NO2                                                4

A). 1 4 5 2
B). 5 2 3 4
C). 1 2 3 4
D). 5 4 3 2

Answer: 1 2 3 4

   
362). Which one of the following is the Answer:sequence of the given elements in  the increasing order of their reactivity?
A). Iodine-Bromine-Chlorine-Fluorine
B). Bromine-Iodine-Chlorine-Fluorine
C). Bromine-Iodine-Fluorine-Chlorine
D). Iodine-Bromine-Fluorine-Chlorine

Answer: Iodine-Bromine-Chlorine-Fluorine

   
363). What are the types of bonds present in CuSO45H2O?
A). Electrovalent and covalent
B). Electrovalent and co-ordinate covalent
C). Electrovalent, covalent, co-ordinate covalent and hydrogen bonds
D). Covalent and co-ordinate covalent

Answer: Electrovalent, covalent, co-ordinate covalent and hydrogen bonds


   
364). In chemical terms, what are alums used for purifying water for drinking 
purposes?
A). Hydrated chlorides
B). Double nitrates
C). Double sulphates
D). Nitrates of aluminium

Answer: Double sulphates


   
365). H2O is liquid and H2S is a gas because
A). oxygen forms stronger hydrogen bond than sulphur
B). oxygen is less electroncgative than sulphur
C). atomic radius of oxygen is less than that of sulphur
D). atomic radius of oxygen is greater than that of sulphur

Answer: oxygen forms stronger hydrogen bond than sulphur
 

366). Sandstone is a
A). extrusive igneous rock
B). intrusive igneous rock
C). metamorphic rock
D). sedimentary rock

Answer: sedimentary rock


   
367). Which one of the following acids is used for etching glass?
A). H2SO4
B). HNO3
C). HF
D). HCL

Answer: HF


   
368). Which zone of a candle flame is the hottest?
A). Dark innermost zone
B). Outermost zone
C). Middle luminous zone
D). Central zone

Answer: Outermost zone

   
369). In a redox reaction , Na2S2O3 changes to Na2S4O6 What is the equivalent weight of Na2S2O3?
A). Same as its molecular weight
B). 1/2 * (its molecular weight)
C). 1/3 * (its molecular weight)
D). 1/4 * (its molecular weight)

Answer: Same as its molecular weight

   
370). In surgery, metal pins are used for joining together broken bones. These metal  pins remain uncorroded in the body. What is the material of these pins?
A). Copper
B). Iron
C). Aluminium
D). Titanium

Answer: Titanium