(Download) MPPSC : State Forest Service (Mains) Exam Paper-2018 Science technology and environment

(Download) MPPSC : State Forest Service (Mains) Exam Paper-2018

Science technology and environment

Q.No: 1 Chemical formula of  Bleaching powder is :
A CaOCl₂
B CaOCl 
C CaClO²
D CaOCl₃

Q.No: 2 Which of the following is monomer of P.V.C :
A Ethylene
B Vinyl chloride
C Acrylonitrile 
D Ethylene glycol

Q.No: 3 The chemical composition of ordinary glass can be written as follows :
A Na₂ SiO₃ . CaSiO₃ . 4SiO₂
B Na₂ SiO₃ . CaSiO₃ . 6SiO₂
C Na₂ O.CaO. 4SiO₂ 
D Na₂ SiO₃ . CaSiO₃ . 2SiO₂

Q.No: 4 Teflon is formed by polymerisation of the following monomer :
A CH₂= CH₂
B CH₂= CHCl
C CF₂= CF₂
D C₆ H₅ CH=CH₂

Q.No: 5 Which of the following is amphoteric in nature ?
A H₂O H₂O
B HCl HCl
C NaOH NaOH
D HNO₃ HNO₃

Q.No: 6 The element having electronic configuration [Ar]3d⁶ .4s²  belongs to which of the following block of elements:
A s – block of elements
B p – block of elements
C d – block of elements
D f – block of elements

Q.No: 7 Ores that are concentrated by Froth Flotation method are :
A Carbonate ores
B Sulphide ores 
C Oxide ores
D Phosphate ores

Q.No: 8 Neutralization reaction  -KOH(aq) + HCl(aq) KCl(aq)+ H2O -----is an example of which the following type ofreaction :
A Reversible reaction
B Irreversible reaction
C Both reversible and irreversible reaction
D None of these

Q.No: 9 Among the following elements which has more than one oxidation states:
A Sodium (Na)
B Magnesium (Mg)
C Iron (Fe)
D Aluminum (Al)

Q.No: 10 According to Lewis  concept of acid- bases, Lewis acid are :-
A Proton accepters
B Proton donars
C Electron pair accepters 
D Electrons pair donor

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Q.No: 11 Galvanisation is a method of protecting iron from rusting by coating with thin layer of a metal,which of the following metal is used for this purpose :
A Copper
B Aluminium
C Zinc
D Chromium 

Q.No: 12 What is pH of 10-4M NaOH solution ? 
A 4 
B 10
C 7 
D 12

Q.No: 13 Which isotope of Hydrogen does not haveneutron in the nucleus : 
A 1H1
B 1D2
C 1T3
D None of these

Q.No: 14 Alkaline hydrolysis of oils and fats is called :
A Neutralisation
B Esterification
C Polymerization
D Saponification

Q.No: 15 Which among the following is strongest acid ?
A HCOOH 
B CH3COOH
C CH3 CH2COOH 
D CH3 CH2 CH2 COOH

Q.No: 16 Ortho and para hydrogens have:
A Same physical properties but different chemical properties
B Different physical properties but same chemical properties
C Same physical and chemical properties
D Different physical and chemical properties

Q.No: 17 When CH3MgBr (Grignard reagent ) is made to react with formaldehyde and product is hydrolysed, then which of the following compound is obtained :
A CH3CH2OH 
B CH3OH
C CH3COOH 
D CH3CHO 

Q.No: 18 On passing CO2 through an aqueous solution of Na2CO3 , the compound formed is : 
A NaOH
B H2O2
C NaHCO3
D Na2O

Q.No: 19 Which among the following alloys contains Tin(Sn) as one of its constituents ? 
A Stainless Steel
B Brass
C Bronze
D German Silver

Q.No: 20 The electronic configuration of 3 elements (X, Y, Z) is as follows :- X= 2, 8 Y = 2,8,7 Z = 2,8,8,2 Which is correct statement among the following : 
A X and Y both are metals
B Y and Z both are metals
C Z and X both are non metals
D Y is a non metal and Z is a metal

Q.No: 21 Which has highest calorific value:
A Charcoal
B Cow dung
C Wood
D Biogas

Q.No: 22 Which is not the property of an ideal fuel:
A It is a pollution free fuel. 
B It is a clean fuel.
C Its calorific value is lower.
D Its accidental hazards are lower.

Q.No: 23 which of the fallowing  variety of coal contains highest percentage of carbon:
A Bituminous
B Anthracite
C peat
D Lignite

Q.No: 24 Which one is non renewable source of energy:
A Hydrogen
B Natural gas
C Biogas
D Ocean 

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