Related Questions

In a annutal behavior experiment , 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. what percent of the total number of piegens returned to the laboratory?
A 80.5%
B 82.5%
C 82%
D 85%
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700
A dealer offers a cash discount of 20% and still makes a profit of 20% , When he further allows 16 articles to a dozen to a particularly sticky bargainer How much percent above the cost price were his wares listed?
A 80%
B 75%
C 100%
D Try your self
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
A Polyvinyl alcohol
B Polyvinyl acetale
C Polyvinyl butyral
D PVC
In distributing milk at a summer camp it is found that a quart of milk will fill either 3 large glass tumblers. How many small glass tumblers can be filled with one large glass tumbler ?
A 11/5
B 7/5
C 5/3
D 7/3
In distributing milk at a summer camp it is found that a quart of milk will fill either 3 large glass tumblers or 5 small lass tumblers. How many small glass tumblers can be filled with one large glass tumbler?
A 11/5
B 7/5
C 5/3
D 7/3
A glass when full of milk, weighs 1 kg. It weighs 0.75 kg when the glass is half full. What is weight of the empty glass?
A 0.25 kg
B 0.35 kg
C 0.40 kg
D 0.50 kg
Glass reacts with
A H2SO3
B HF
C HNO3
D K2Cr2O7
নিচের কোন যৌগটি জৈব এসিডের সাথে বিক্রিয়া করে এস্টার উৎপন্ন করে? (Which of the following compounds reacts with an organic acid to form an ester?)
A অ্যালকোহল (alcohol)
B অ্যালডিহাইড (aldehyde)
C অ্যামিন (amine)
D কিটোন (ketone)
a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added
A 20
B 10
C 40
D 30

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