What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer. a. Hydrogen gas and iron chloride are produced.b. Chlorine gas and iron hydroxide are produced.c. No reaction takes place,d. Iron salt and water are produced.
\(Fe_2O_3+1Al \rightarrow Al_2O_3+2Fe\) The above reaction is an example of a _______________ Options: a. Combination reaction b. Double displacement reaction c. Decomposition reaction d. Displacement reaction
Fe_2O_3 + 2Al → Al_2O_3 + 2Fe The above reaction is an example of a _______________ Read More »
Which of the statements about the reaction below are incorrect? \[2PbO_{(s)} + C_{(s)} \rightarrow 2Pb_{(s)} + CO_{2(g)}\] a. Lead is getting reduced. b. Carbon dioxide is getting oxidised. c. Carbon is getting oxidised. d. Lead oxide is getting reduced Options i. (a) and (b) ii. (a) and (c) iii. (a),(b) and (c) iv. all
Identify the substances that are oxidised and the substances that are reduced in the following reactions i. \[4Na_{(s)}+O_{2(g)} \rightarrow 2Na_2O_{(s)}\] ii. \[CuO_{(s)}+H_{2(g)} \rightarrow Cu_{(s)}+H_2O_{(l)}\]
Give an example of a double displacement reaction other than the one given in Activity 1.10.
Why does the color of copper sulphate solution change when an iron nail is dipped in it?
Why does the color of copper sulphate solution change when an iron nail is dipped in it? Read More »
Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other? Name this gas.
A solution of a substance ‘X ‘ is used for white washing. i. Name the substance ‘X’ and write its formula.ii. Write the reaction of the substance ‘X’ named in (i) above with water.
A solution of a substance ‘X ‘ is used for white washing. Read More »
Write a balanced chemical equation with state symbols for the following reactions. i. Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. ii. Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
Write the balanced equation for the following chemical reactions. i. Hydrogen + Chlorine → Hydrogen chloride ii. Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride iii. Sodium + Water → Sodium hydroxide + Hydrogen
Write the balanced equation for the following chemical reactions. Read More »