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Question
Which of the following materials are used for preparing
blur-black ink?

1 Gallic acid

2 Tannic acid

3 Ferrous sulphate

4 All of these
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tannic acid 3 Ferrous sulphate 4 All of these
Answer
# 1
(4) All of these
 
Is This Answer Correct ?    0 Yes 0 No
Guest
 
  Re: Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tannic acid 3 Ferrous sulphate 4 All of these
Answer
# 2
tannic acid
 
Is This Answer Correct ?    0 Yes 0 No
Raj Thakre
 
 
 

 
 
 
Other General Science Interview Questions
 
  Question Asked @ Answers
 
The combustible material at the tip of a safety match sitck is 1 Sulphur 2 Manganese dioxide 3 Phosphorus 4 Antimony sulphide  1
A super conductor is characterized by 1 Zero permeability 2 Low permeability 3 High permeability 4 Infinite permeability  1
the colour of a star is an indication of its?  1
Catalytic properties of a substance may be best defined as a phenomenon of 1 Absorption 2 Chemisorption 3 Adsorption 4 None of these  1
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of 1 Nitrates 2 Zeolites 3 Sulphontes 4 None of these  1
what are advantages & disadvantages of science?  1
Soap is a mixture of sodium or potassium salts of 1 Monocarboxylic acids 2 Glycerol’s 3 Dicarboxylic acids 4 Tricarboxylic acids  1
Superphosphate fertilizer is prepared by the reaction between 1 Calcium phosphate and Sulphuric hydroxide 2 Sodium phosphate and Sodium nitrate 3 Magnesium phosphate and Sodium nitrate 4 Sodium sulphate and Phosphoric acid Central-Police-Forces2
What is the microbiology ?  3
What is the Cellular Structure ?  1
Soda-acid fire extinguisher involves the reaction between 1 Sodium hydroxide and nitric acid 2 Sodium bi carbonate and sulphuric acid 3 Sodium sulphate and carbonic acid 4 Sodium carbonate and hydrochloric acid  2
What is the Physiology ?  2
Which variety of glass is heat resistant? 1 Hard glass 2 Flint glass 3 Pyrex glass 4 Bottle glass  1
What is the Taxonomy ?  1
The location and energy of an electron in an atom can be specified by 1 Atomic mass 2 Atomic number 3 Quantum numbers 4 None of these  1
The high-temperature superconductors are 1 Metal alloys 2 Ceramic oxides 3 Inorganic polymers 4 Pure rare earth metals  1
What is blood ? Describe its functions in the human body ?  1
The Contact Process is involved in the manufacture of 1 Nitric acid 2 Sulphuric acid 3 Ammonia 4 Caustic soda  1
Optic fibers are mainly used for which of the following? 1 Communication 2 Weaving 3 Musical instruments 4 Eye surgery  1
Isotopes are separated by 1 Filtration 2 Sublimation 3 Distillation 4 Crystallization NIFT1
 
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