Previous Year Paper year:2009 : ICSE-X-Chemistry

Home Learn Fast select Course

Change Unit Change Subject Last Menu

ICSE-X-Chemistry

Previous Year Paper year:2009

with Solutions - page 7

Note: Please signup/signin free to get personalized experience.

Note: Please signup/signin free to get personalized experience.

10 minutes can boost your percentage by 10%

Note: Please signup/signin free to get personalized experience.

#6

#6-a [3]
Give one chemical test to distinguish between the following pairs of compounds.

#6-a-i
i. Zinc sulphate solution and zinc chloride solution.
Ans : On addition of BaCl₂ solution, Zinc sulphate solution will give a white ppt. of BaSO₄ while Zinc chloride solution will not give any ppt with BaCl₂ solution.

#6-a-ii
ii. Iron (II) chloride solution and iron (III) chloride solution.
Ans : Iron II chloride gives a dirty green ppt with NaOH solution. Iron III chloride will give a reddish brown ppt with NaOH solution.

#6-a-iii
iii. Calcium nitrate solution and calcium chloride solution.
Ans : Calcium chloride solution will give a white ppt with AgNO₃ solution while calcium nitrate solution will not give any ppt with AgNO₃ solution.

#6-b [3]
Define the following terms:

#6-b-i
i. Mole
Ans : Mole: It is the quantity of a substance which contains Avogadro's number of constituent particles.

#6-b-ii
ii. Neutralisation
Ans : Neutralisation: It is the process by which H⁺ ions of an acid react completely with the OH^- ions of a base to give salt and water only.

#6-b-iii
iii. Ionisation potential
Ans : Ionisation Potential: It is the amount of energy required to remove a valence electron from an isolated gaseous atom of an element.

#6-c [4]
Fill in the blanks with the correct words from the brackets:
Generally, ionic compounds exist in (i) _______ (solid/liquid/gas) state. Melting and
boiling points of covalent compounds are generally (ii) _________ (low/high). The general
formula for alkane is (iii) __________ (``\ce{ C_nH_{2n}/C_nH_{2n-2}/C_nH_{2n+2}}``). For alkynes, the general
formula is (iv) _________ (``\ce{ C_nH_{2n}/C_nH_{2n-2}/C_nH_{2n+2}}``).
Ans :
(i) solid
(ii) low
(iii) C_nH_2n+2
(iv) C_nH_2n-2

#7

#7-a [4]
Give chemical equation for
Ans :

#7-a-i
i. The laboratory preparation of methane from sodium acetate.

#7-a-ii
ii. The industrial preparation of methanol from water gas. **

#7-a-iii
iii. The reaction of one mole of ethene with one mole of chlorine gas.