Test Details

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Chemical Reactions and Equations

Write about different kind of chemical reactions

Feb 08, 7:00 PM

50 minutes

Feb 08, 7:50 PM

100.0 marks

MCQ

50 questions

Rajesh Kharb

MSc,MEd,MBA,PHD

Class Details

Mathematics

Chemistry

Physics

Biology

English

English Grammar

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Question Text

Question 1 :
What does decomposition reaction for silver bromide require energy in the form of?

Question 2 :
A shiny brown coloured element ‘X’ on heating in air forms a black coloured compound. What is the black coloured compound formed?

Question 3 :
When a magnesium ribbon is burnt in air, the ash formed is

Question 4 :
State true or false: In electrolysis of water experiment the amount of gas collected in one test tube is equal to the amount of gas collected in another test tube.

Question 5 :
What does decomposition reaction for water require energy in the form of?

Question 6 :
$Fe_2O_3$ + 2Al → $Al_2O_3$ + 2Fe. The above reaction is an example of a

Question 9 :
Write the balanced chemical equations for Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water.

Question 10 :
In the refining of silver from silver nitrate, which reaction is involved?

Question 14 :
Why are decomposition reactions called the opposite of combination reactions? Explain.

Question 15 :
What does decomposition reaction for water require energy in the form of?

Question 17 :
What does decomposition reaction for calcium carbonate require energy in the form of?

Question 19 :
$Fe_2O_3$ + 2Al → $Al_2O_3$ + 2Fe. The above reaction is an example of a

Question 20 :
What does decomposition reaction for silver bromide require energy in the form of?

Question 22 :
When zinc granules are added to sulphuric acid, the product formed is ?

Question 23 :
What is the substance getting oxidised in $4Na(s) + O_2(g) → 2Na_2O(s)$ ?

Question 25 :
What is the substance getting oxidised in $CuO(s) + H_2(g) → Cu(s) + H_2O(l) $?

Question 26 :
Balance the chemical equation:- $BaCl_2 + H_2SO_4 → BaSO_4 + HCl$.

Question 27 :
A solution of a substance ‘X’ is used for whitewashing. Name the substance ‘X’ and write its formula.

Question 29 :
Name the gas collected in one of the test tubes which is double the amount collected in the other in electrolysis of water experiment.

Question 30 :
Magnesium ribbon is rubbed before burning because it has a coating of

Question 31 :
What type of a reaction is $H_2 (g) + Cl_2 (g) → 2HCl(g) ? $

Question 33 :
Write the balanced chemical equations for Aluminium + Copper chloride → Aluminium chloride + Copper.

Question 35 :
What is the colour of the copper sulphate solution after dipping an iron nail in it?

Question 36 :
A solution of a substance X' is used for white washing. Name the substance 'X'.

Question 37 :
A shiny brown coloured element ‘X’ on heating in air forms a black coloured compound. What is it?

Question 38 :
Balance the chemical equation:- $ NaOH + H_2SO_4 → Na_2SO_4 + H_2O$.

Question 40 :
Write the balanced chemical equations for Zinc + Silver nitrate → Zinc nitrate + Silver.

Question 42 :
What happens when dilute hydrochloric acid is added to iron filings ?

Question 45 :
Why are oil and fat containing food items are flushed with nitrogen?

Question 46 :
When a magnesium ribbon is burnt in oxygen, it gets converted to

Question 47 :
When you add lead nitrate to potassium iodide, their particles combine to form?

Question 48 :
What happens when dilute hydrochloric acid is added to iron filings ?

Question 50 :
What type of a reaction is $Mg (s) + 2HCl (aq) → MgCl_2 (aq) + H_2 (g) ? $

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