Page 248 - Chemistry ICSE Class X

234 ICSE Chemistry – 10

Questions from Board Papers

Q 1. From the list given below, select the word(s) required to complete the blanks (i) to (v) in the following passage
correctly. [ICSE 2010]
Note: Words chosen from the list are to be used only once. Write only the answer. Do not copy the passage.
[reddish-brown, ammonium, nitrogen dioxide, hydroxyl, dirty-green, ammonia, acidic, alkaline]
Nitrogen and hydrogen combine in the presence of a catalyst to give (i) _______ gas. When the above mentioned
gas is passed through water it forms a solution which will be (ii) __________ in nature and the solution contains
(iii) ________ ions and (iv) ________ ions. The above solution when added to iron(II) sulphate solution, gives a
(v) ________ coloured precipitate of iron(II) hydroxide.
Q 2. Write the equation when ammonium chloride is heated with sodium hydroxide. [ICSE 2010]
Q 3. The questions below are related to the manufacture of ammonia. [ICSE 2010]
(i) Name the process (ii) In what ratio must the reactants be taken?
(iii) Name the catalyst used (iv) Give the equation for the manufacture of ammonia
(v) Ammonia can act as a reducing agent – write a relevant equation for such a reaction.
Q 4. The diagram shows a simple arrangement of the Fountain experiment: [ICSE 2010]

(i) Name the two gases you have studied which can be used in this experiment.
(ii) What is the common property demonstrated by this experiment?
Q 5. State your observation for the following cases: [ICSE 2010]
(iv) Ammonia gas is burnt in an atmosphere of oxygen in the absence of a catalyst.
Q 6. What would you observe in each of the following cases? [ICSE 2011]
K #OOQPKWO J[FTQZKFG KU ſTUV CFFGF KP C UOCNN SWCPVKV[ CPF VJGP KP GZEGUU VQ C UQNWVKQP QH EQRRGT UWNRJCVG
(ii) Water is added to the product formed, when aluminium is burnt in a jar of nitrogen gas.
Q 7. The diagram shows an experimental set up for the laboratory preparation of Mixture X
a pungent smelling gas. [ICSE 2011] Gas
The gas is alkaline in nature.
(i) Name the gas collected in the jar.
(ii) Write the balanced equation for the above preparation.
(iii) How is the gas being collected ? Y
(iv) Name the drying agent used.
X *QY YKNN [QW ſPF VJCV VJG LCT KU HWNN QH ICU!
Q 8. Name the gas in the following: [ICSE 2012]
(i) The gas produced when excess ammonia reacts with chlorine.
Q 9. Some word/words are missing in the following statement. You are required to rewrite the statement in the
correct form using appropriate word/words: [ICSE 2012]
(i) Magnesium nitride reacts with water to liberate ammonia.
Q 10. Give balanced equation for the following reaction: [ICSE 2012]
(i) Ammonia and Oxygen in the presence of a catalyst.
Q 11. The following questions are based on the preparation of ammonia gas in the laboratory: [ICSE 2012]
(i) Explain why ammonium nitrate is not used in the preparation of ammonia.
(ii) Name the compound normally used as a drying agent during the process.