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1.
Which of the following is a thermal decomposition reaction ?
2.
In the reaction Hg2Cl2 + Cl2 --> 2HgCl2 The reducing agent is
3.
Which of the following reactions will not take place ?
4.
Which of the following involves combination of two elements ?
5.
Which of the following is precipitation as well as double displacement reaction?
6.
7.
What is observed when a solution of potassium iodide is added to silver nitrate solution ?
8.
Burning Magnesium ribbon is brought in the gas jar of carbon dioxide. Which of the following is correct ?
(i) It keeps on burning
(ii) It gets extinguished
(iii) Although CO2 is non-supporter of combustion but burning magnesium breaks CO2 into carbon and oxygen, oxygen helps in burning.
(iv) Carbon dioxide is supporter of combustion.
(i) It keeps on burning
(ii) It gets extinguished
(iii) Although CO2 is non-supporter of combustion but burning magnesium breaks CO2 into carbon and oxygen, oxygen helps in burning.
(iv) Carbon dioxide is supporter of combustion.
9.
When green coloured ferrous sulphate crystals are heated, the colour of the crystal changes because
10.
2HNO3 + Ca(OH)2 --> Ca(NO3)2 + 2H2O; is an example of
(i) displacement reaction
(ii) double displacement reaction
(iii) neutralisation reaction
(iv) combination reaction.
(i) displacement reaction
(ii) double displacement reaction
(iii) neutralisation reaction
(iv) combination reaction.