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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ६

______ gas causes tears in our eyes while cutting onions.

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प्रश्न

______ gas causes tears in our eyes while cutting onions.

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उत्तर

Propanethial s-oxide gas causes tears in our eyes while cutting onions.

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पाठ 3: Chemistry in Everyday Life - Evaluation [पृष्ठ ४४]

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सामाचीर कलवी Science - Term 3 [English] Class 6 TN Board
पाठ 3 Chemistry in Everyday Life
Evaluation | Q II. 1. | पृष्ठ ४४

संबंधित प्रश्‍न

Define precipitation reaction.


Write the missing reactants and products and balance the equations.

................+ HCI `→` NaCI + `"H"_2"O"` + .........................


Fill in the blank:

During a chemical reaction transfer of ________ takes place.


Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Hydrogen chloride


Give an example of the following chemical change.

Two solids combine to form a liquid


What do you observe? When

Sodium chloride solution is added to silver nitrate solution.


Name the gases which turn moist red litmus blue.


What is a chemical reaction?


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.


Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction

Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.


What happens when cane sugar is strongly heated? Mention any two changes in it.


When lithium metal is placed in hydrochloric acid, _______ gas is evolved.


Which of the following statement is incorrect for a chemical reaction?


Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings


Give an example of a chemical reaction for the following situation:

A change in colour is observed


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Write a word equation for the chemical change, if any.


Is the conversion of milk into ice cream a chemical change?


Define the following term:

Chemical change


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