Related Questions

Grignard reagent is chemically known as
A Ethyl magnesium chloride
B Methyl magnesium chloride
C Dichlorophenol
D Monochloro acetic acid
A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
D 28
Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
Ar-CHO →বিকারক (Reagent) →H+H2O ArCH(OH)COOH  বিকারকটি -
A RMgX
B HCN
C CH3Cl 
D   H2CO3
মূত্রে শর্করার উপস্থিতি নির্ণয়ে যে reagent ব্যবহার করা হয় তার নাম--
A benedict reagent
B EDTA
C sodium citrate
D acid citrate dextrose
NH4+ আয়নের উপস্থিতি নির্ণয়ে ব্যবহৃত বিকারকটি হল- (The reagent used to confirm the presence of NH4+ ion is_)
A NaOH
B K4[Fe(CN)6]
C NaOH, K2Hgl4
D (NH4)2c2O4
Bayer's reagent is
A Alkaline potassium permanganate
B Acidified potassium permanganate
C Hydrogen peroxide
D Bromine water
ফিনোলিক -OH শনাক্তকরণে ব্যবহৃত বিকারকটি হলো ( The reagent used to identify phenolic -OH is)
A Fecl3
B Na, conc. HCl
C acidic K2Cr2O7
D NaHCO3
It is____ to try destroy pest completely with chemical poisons, for as each new chemical pesticide introduced, the insects gradually become ____ to it.
A useless/drawn
B pointless/vulnerable
C futile/resistant
D wicked/indifferent
A container holds 4 quarts of chemical and 4 quarts of water. How many quarts of water must be added to the container to create a mixture that is 3 parts chemical to 5 parts water by volume?
A 4/3
B 5/3
C 7/3
D 8/3

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