Tnpsc group 4|Previous year question papers(Chemistry) Online Test in English
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Chemical name of Teflon is
(A) Poly propylene✔X
B) Poly Acetylene✔X
Poly tetra fluro ethylene✔X
(D) Poly Vinyl alcohol✔X
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The compounds which have back bonding are
(A) Metal nitrates✔X
(B) Metal carbonates✔X
Metal carbonyls✔X
(D) Metal oxides✔X
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The ozone layer forms naturally by
A) interaction of CFC with oxygen✔X
interaction of UV radiation with oxygen✔X
(C) interaction of IR radiation with oxygen✔X
(D) interaction of oxygen and water vapour✔X
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The Indian Salt Petre is
(A) Ammonium nitrate (NH, NO3)✔X
(B) Sodium nitrate (Na NO2)✔X
Potassium nitrate (KNO:)✔X
D) Calcium nitrate Ca (NO),✔X
5/50
The unit for equivalent conductivity is
(A) ohm-cm-1|✔X
ohm-lem"eq✔X
(B) ohm-cm'eq-1✔X
D) S cm2eq-1✔X
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The main constituent of steel in India are
A) Ni and Cu✔X
Mn and Cr✔X
(C) Fe and Cu✔X
D) Ti and Cr✔X
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Which of the following pair is not a natural pesticide?
(A) Turmeric and Neem✔X
B) Malathion and DDT✔X
C) Neem and Castor Oil✔X
(D) Castor Oil and Turmeric✔X
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Which one of the following is not correctly matched :
A) Caesium 1. Alkalimetall✔X
(B) Uranium 2. Transition metal✔X
(C) Barium Alkaline earth metal✔X
(D) Silver 4. Transition metal✔X
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Auto ionisation of H.O leads to the formation of
(A) II 0✔X
B) = OH✔X
(C) H |✔X
H,O and OH✔X
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103. Arrange the following in increasing order of their pH values : 1. Human Blood . II. Stomach acid III. Pure water IV. Milk
(A) II, III, IV and I✔X
(B) II, I, III and IV✔X
II, IV, Ill and I✔X
(D) I, III, IV and II✔X
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Which one of the following is not an allotrope of carbon?
(A) Piamond✔X
(B) Graphite✔X
(C) Fullerene✔X
Butane✔X
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Match List 1 with List II, select the correct answer using the codes given in the options : (a) (b) (c) (d) List I First Generation Pesticides Second Generation Pesticides Third Generation Pesticides Fourth Generation Pesticides 1. 2. 3. List II Pheromones Juvenile Hormones Pyrethrins Organo phosphates
1 2 3 4✔X
4 3 4 2✔X
3412✔X
4231✔X
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Match the following : (a) Castor oil Sesamum indicum - (b) Gingley oil Azadirachta indica (c) Neem oil | Arachis hypogea (d) Groundnut oil Ricinus communis
1234✔X
3421✔X
(c) 4 1 2 3✔X
(d) 2 4 3 1✔X
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The aqueous solution of potassium chloride is
(A) a weak electrolyte✔X
a strong electrolyte✔X
a non-electrolyte✔X
initially weak and then become a strong electrolyte✔X
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An acid is a substance that can lose a proton is called '
A) Arrhenius concept✔X
Bronsted-Lowry concept✔X
Lewis concept✔X
Usanovich concept✔X
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Which of the following is a wrong statement?
(A) All the minerals are not ores✔X
All the ores are not minerals✔X
(C) All the ores are minerals✔X
(D) From ores, metals can be extracted economically✔X
17/50
Match List I with List II correctly and select your answer using the codes given below : List I List II a) Finely divided nickel 1. Oxidation Acidified potassium dichromate 2. Reducing agent c) Loss of electrons Reduction d) | Gain of electrons 4. Oxidising agent.
2134✔X
3214✔X
2413✔X
1243✔X
18/50
Green manures can be obtained from which of the following ?
A) Cowdung and plant wastage✔X
B) Sun-hemp and cluster bean✔X
Sun-hemp and cowdung✔X
Cowdung and animal wastage.✔X
19/50
Electroplating is a process of coating one metal over the other metal by electrolysis. In the electroplating of silver spoon with gold. the silver spoon must be taken as
cathode✔X
anode✔X
electrolyte✔X
both (A) & (B).✔X
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