STS - Student Testing Service

200 Questions | By Abdulsamadn4 | Last updated: Mar 21, 2022 | Total Attempts: 734

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ONLINE TEST INFORMATION MUST FOLLOW STEPS First Submit Your Detail below (9)No Negative Marks Online test divided into 10 portion each contain 20 mcqs No Back system after you go to next portion. If page was refresh then your all mcqs answer removed. TIMING 8:00 am to 8:00 pm then link will be removed Time duration 150 minutes or 2:30 hour Please use android mobile or laptop or pc Ios ( iphone is not supported )

Questions and Answers

1.

An insulated tube with a movable piston at one end had 500j of heat added to it if during experiement the piston moves and does 75j of work on the atmosphere what change in energy of tube system ?
- A.
  
  775j
- B.
  
  500j
- C.
  
  425
- D.
  
  -75
- E.
  
  -425
2.

The oxidation state of Nitrogen is most negative in which of the following compound ?
- A.
  
  N₂
- B.
  
  N₂O
- C.
  
  NO₂
- D.
  
  NO₃
- E.
  
  NH₃
3.

All combustion reactions are ........Reactions?
- A.
  
  Endothermic
- B.
  
  Exothermic
- C.
  
  Photo Chemical
- D.
  
  Rearrangment
4.

The anode at is electrode at which ........process occurs?
- A.
  
  Oxidation
- B.
  
  Reduction
- C.
  
  Self Redox Reaction
- D.
  
  None of these
5.

For a gas obeying boyles law ,if pressure is doubled than volume become ?
- A.
  
  Half
- B.
  
  Double
- C.
  
  4 time increase
- D.
  
  8 time increase
6.

Which molecule has zero dipole movement?
- A.
  
  NH₃
- B.
  
  SO₂
- C.
  
  H₂O
- D.
  
  CO₂
7.

The percent composition of an unknown element X in CH₃X is 32%.which of the following is element X?
- A.
  
  H
- B.
  
  F
- C.
  
  Na
- D.
  
  Cl
- E.
  
  Li
8.

How much NaOH must be added to make 200mL of a 1M NaOH solution?
- A.
  
  80
- B.
  
  40
- C.
  
  16
- D.
  
  8
9.

A process involving no Heat exchange is known as?
- A.
  
  Isothermal process
- B.
  
  Adiabatic process
- C.
  
  Isometric process
- D.
  
  Isobaric process
10.

Which of the following is Formula for a noncyclic saturated hydrocarbon?
- A.
  
  C₇H₁₂
- B.
  
  C₇H₁₈
- C.
  
  C₇H₁₄
- D.
  
  C₇H₁₆
11.

When electron jumps from n=6 to n=2 then belongs to ......series?
- A.
  
  Layman Series
- B.
  
  Balmar Series
- C.
  
  Bracket Series
- D.
  
  Pfund Series
12.

The oxidation state of Fe in K4[Fe(CN)6?
- A.
  
  +3
- B.
  
  +4
- C.
  
  0
- D.
  
  +2
- E.
  
  -2
13.

The colour of phenolphthane in Basic medium ?
- A.
  
  Red
- B.
  
  Yellow
- C.
  
  Blue
- D.
  
  Pink
- E.
  
  Colourless
14.

How many pi Bond are present in N₂?
- A.
  
  2
- B.
  
  3
- C.
  
  No Pi bond
- D.
  
  1
15.

When a solution its pH is 3.2 then what will be its PoH .?
- A.
  
  5.8
- B.
  
  6.8
- C.
  
  9.8
- D.
  
  10.8
- E.
  
  Same
16.

The Geometry Of NH3 is?
- A.
  
  Planner Trigonal
- B.
  
  Trigonal pyramidal
- C.
  
  Tetrahydral
- D.
  
  Bent angular
17.

Balmer series Contain .......region of Light?
- A.
  
  Visible
- B.
  
  Ultraviolet
- C.
  
  Infrared
- D.
  
  For infrared
18.

Rectified sprit contain how many percentage of Alcohol?
- A.
  
  4%
- B.
  
  11%
- C.
  
  85%
- D.
  
  90%
- E.
  
  99.99%
19.

Removal of Hydrogen and Water this reaction known as?
- A.
  
  Hydrogenation
- B.
  
  Halogenation
- C.
  
  Both
- D.
  
  Hydrohalogenation
- E.
  
  All
20.

Which of the following is Not Isotope of Hydrogen ?
- A.
  
  Dueterium
- B.
  
  Protium
- C.
  
  Uranium
- D.
  
  Tritium
- E.
  
  C&D both
21.

Coke is produced from bitumeious coal by
- A.
  
  Cracking
- B.
  
  Synthesis
- C.
  
  Substitution
- D.
  
  Destructive Destillation
- E.
  
  Filteration
22.

Heating phenol with Zn will yeilds?
- A.
  
  Benzen
- B.
  
  Benzoic Acid
- C.
  
  Phenoxide acid
- D.
  
  Chloro ethane
- E.
  
  Cyclohexane
23.

Formaldehyde +Ethyle Alcohol ..........product will Form?
- A.
  
  Oxime
- B.
  
  Formic acid
- C.
  
  Ethonic acid
- D.
  
  .Hemiacetal
- E.
  
  NONE
24.

Which of the following factors has no effect on Boiling Point?
- A.
  
  Pressure
- B.
  
  Intermolecular forces
- C.
  
  Amount of liquid
- D.
  
  Impurties
- E.
  
  None
25.

Yeast Can be used to convert simple sugar to .......?
- A.
  
  Ethonoic acid +O2
- B.
  
  Ethyle Alcohol +CO2
- C.
  
  Ethanol +O2
- D.
  
  Starch +Carbohydrate
- E.
  
  Starch +O2

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