Related Questions

The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
A Base and strong acid
B Base and weak acid
C Acid and weak base
D None of these
100 kg of solution A is mixed with 60 kg of solution B . If solution A has tin and copper in the ratio 1: 4 and solution B has lead and tin in the ratio 3 :2 then what is the amount of tin in the new solution?
A 70 kg
B 36 kg
C 44 kg
D 56 kg
Solution X contains 7% (by weight) of liquid M and solution Y contains 14.5% (by weight) of liquid M. If 3 grams of solution X is mixed with 2 grams of solution Y, then liquid M accounts for what percent of the weight of the resulting solution?
A 6.09%
B 10%
C 10.75%
D 21.5%
Solution X is 10% percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 25 percent alcohol by volume?
A 600
B 800
C 300
D 250
E None of these
How many ounces of water must be added to a 30-ounce solution that is 40 percent alchol to dilute the solution to 25 percent alcohol?
A 10
B 15
C 16
D 18
Read the following passage and answer questions. On the face of it, telescopes and data bases sound like very different things. Telescopes sit on the top of mountains, and are pointed at the skies; data bases sit on computer hard disks, humming away and g
A Telescopes and data bases complement each other for the astronomer
B Telescopes and data bases are both becoming relevant for the astronomer
C Telescopes and data bases have nothing in common for the astronomer
D Telescopes and data bases can be confusing to the astronomer
Read the following passage and answer questions. On the face of it, telescopes and data bases sound like very different things. Telescopes sit on the top of mountains, and are pointed at the skies; data bases sit on computer hard disks, humming away and
A The contemporary astronomer needs to look at the sky from a mountain top.
B The contemporary astronomer needs a telescope to explore the universe.
C The contemporary astronomer needs heavy machinery to explore the universe.
D The contemporary astronomer needs a telescope equipped with digital sensors to explore the universe.
Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.
A Catalytic
B Endothermic
C Exothermic
D Autocatalytic
Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?
A 81
B 81.5
C 82
D 84.5
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
A Explosive
B Soap
C Detergent
D Analgesic drug

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