English

Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins - Science

Advertisements
Advertisements

Question

Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:

Options

  • Gently rubbing with cotton cloth

  • Hot air blower

  • Dry cotton wool

  • Filter paper

MCQ

Solution

Not in Current Syllabus

The raisins after being soaked in water are dried on a piece of filter paper in order to remove the excess water present on their surface.

The Correct Answer is D

shaalaa.com
  Is there an error in this question or solution?
2011-2012 (March) Dehli Set 2

RELATED QUESTIONS

State one characteristic of the chemical reaction which takes place when lemon juice is added gradually to potassium permanganate solution.


Is Burning of natural gas an endothermic reaction or an exothermic reaction?


Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.


Balance the following equation:

NaHCO3 → Na2CO3 + H2O + CO2


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – copper carbonate.


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated –  lead [IV] oxide.


Write word equation for the following chemical reaction given below. Also state the observation seen in the case.

\[\ce{ZnCo3->[\triangle] ZnO + CO2}\]


CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]

State the information not conveyed by the above chemical equation. 


Write three steps of writing chemical equations with example?


Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Write the number of atoms of various elements in the reactants and products.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×