मराठी

A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water.

Advertisements
Advertisements

प्रश्न

A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed them again, and recorded that as ‘y’. The percentage of water absorbed by raisins may be determined using the relationship.

पर्याय

  • `(y-x)/yxx100`

  • `(y-x)/x xx100`

  • `(y-x)/x xx1/100`

  • `(y-x)xx100`

MCQ
Advertisements

उत्तर

Not in Current Syllabus

The percentage of water absorbed by raisins is calculated using the formula

`(y-x)/x xx100`

Where, x is the dry weight of the raisins and y is the weight of the raisins after soaking in water.

The Correct Answer is B.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2011-2012 (March) All India Set 3

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

Balance the following chemical equation:

\[\ce{MnO2 + HCl -> MnCl2 + Cl2 + H2O}\]


What do you understand by exothermic reactions?


The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.

  1. What is metal M?
  2. What is solution S? Is it acidic or alkaline?
  3. What is gas G?
  4. Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
  5. Is this reaction exothermic or endothermic?

Write a balanced chemical equation with state symbols for the following reaction:

Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.


What happens when silver nitrate solution is added to sodium chloride solution?

  1. Write the equation for the reaction which takes place.
  2. Name the type of reaction involved.

Balance the following equation. Also name the product formed.  

K2O + H2O    → KOH 


Complete the following equation:

CH2 + H5OH `("Hot Conc." H_2SO_4)/`>


Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

What is the indications of the arrow between the reactants and the products and of the arrow pointing downwards at the end.


Write an Explanation.

Balanced equations


What is a product in a chemical equation?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×