Which of the following chemicals is also known as “Chinese snow” ?
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25%
Ammonium nitrate (NH4NO3)
29%
Potassium nitrate (KNO3)
21%
Sodium nitrate (NaNO3)
24%
Silver iodide (AgI)
S.B STUDY ACADEMY এর পক্ষ থেকে সকল সদস্যকে জানাই শুভ বিজয়ার প্রীতি শুভেচ্ছা ও আন্তরিক অভিনন্দন। সকলে সুস্থ থাকবেন।
Which of the following gas is used to prevent the chips from getting oxidised ?
Anonymous Quiz
23%
Hydrogen
27%
Helium
42%
Nitrogen
9%
Oxygen
What is the common name of acetyl salicylic acid ?
Anonymous Quiz
18%
Paracetamol
64%
Aspirin
15%
Wintergreen
3%
Trazodone
Carnotite is a mineral of which among the following metals ?
Anonymous Quiz
15%
Iron
33%
Uranium
34%
Lead
18%
Aluminum
What is the flame colour of “Strontium Salt” metal ion ?
Anonymous Quiz
32%
Crimson Red
40%
Apple Green
22%
Brick Red
7%
Bluish Green
Commercial nitric acid is coloured because it contains dissolved
Anonymous Quiz
11%
H2
54%
NO2
15%
NO
20%
Coloured impurities
Which radioactive element used in heat pacemakers ?
Anonymous Quiz
20%
Uranium
23%
Plutonium
38%
Radium
19%
Deuterium
Age of a tree is determined using radio-isotope of ____
Anonymous Quiz
9%
Phosphorus
78%
Carbon
9%
Cobalt
4%
Nitrogen
Which gas is used for artificial fruit ripening of green fruit ?
Anonymous Quiz
7%
Methane
20%
Ethane
63%
Ethylene
11%
Acetylene
Soap is prepared by boiling caustic soda with which of the following ?
Anonymous Quiz
24%
Glycerine
45%
Fatty acid
9%
Rubbing alcohol
22%
Sodium benzoate
Which of the following metals are the constituents of German silver ?
Anonymous Quiz
10%
Zinc
13%
Copper
14%
Nickel
63%
All of the above
The natural sources of hydrocarbon is ____
Anonymous Quiz
12%
Natural Gas
18%
Crude Oil
14%
Biomass
57%
Both A and B
Which of the following hydrocarbon is the source of Natural rubber ?
Anonymous Quiz
21%
Cis-isoprene
59%
Trans-isoprene
12%
Adipik acid
9%
Methanol
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Which of the following gives us the mass number of an atom ?
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22%
Total number of Electrons
27%
Total number of Neutrons
33%
Total number of Nucleons
18%
Total number of Protons
Which of the following is correct about Ammonia ?
Anonymous Quiz
19%
The ammonia molecule is trigonal pyramidal in shape
40%
Its aqueous solution is highly basic
36%
Ammonia gas is light blue in colour
5%
Ammonia gas is odorless