10th class chemistry paper 2017 federal board

10th class chemistry paper 2017 federal board Answer any eleven parts from Section ‘B’ and any two questions from Section ‘C’ on the separately Provided answer book. Use supplementary answer sheet Le. Sheet-B if required. Write your answers neatly and legibly. The time allowed: 2:40 Hours Total Marks Sections B and G: 5344 one now

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SECTION — B (Marks 33)

SECTION — B (Marks 33)
Q.2 Attempt any ELEVEN parts. The answer to each part should not exceed 3 to 4 lines. (11 x3 = 33)
0] Following reaction can occur during lightning storms
305g) F 2p,
For this reaction write:
an Equilibrium constant expression
b, Determine the units of A.
c Forward and Reverse Reaction
(i) State three uses of the equilibrium constant?
ci) Briefly describe Acidity of the stomach,
{iv) Define and give examples of Lewis acid.
«v) What is condensed structural formula? Write the condensed structural formula of
a Hexane b Nonane
(vi) What are the reasons for the formation of millions of organic compounds?10th class chemistry paper

Paper 2017 federal board


(ti) Draw electron dat – cross structure for
a Propane b Propene c Propyne
(viii) Write at least three reactions of methane and chlorine in diffused sunlight
(xy Differentiate between fats and oils?
x) What five elements are primarily responsible for the makeup of DNA and RNA?
(xi) There is a scientific evidence that CC’s contribute to the depletion of ozone, why?
Odi) What is a catalytic converter?
(xb) Complete the following reactions:
a CatHco\,
d Cat HOO), CaO). >
c Mg? +4 Na.2 -9
(xiv) Why is it advisable to wash hands well with soap after using the bathroom?
(xy) Define petroleum /10th class chemistry paper

10th class chemistry paper 2017 federal board

. APE SRE Ae Me
(xiv) Why is it advisable to wash hands well with soap after using bathroom?
(xv) Define petroleum
SECTION – larks 20
Note: Attempt any TWO questions. All questions carry equal marks. (2 x 10 = 20)
Cassia White five methods with balanced chemical equations for preparing salts? {05)
b. Wrote a note on uses of salts for food preservation (05)


Qa4aia White general methods of preparation of Alkynes {06)
bd. Write a note on types of vitamins. {04)
as a Write down the treatment of sewage water. Describe its different steps (06)
b. Write Boring point range of the following hydrocarbons: (04)
1 Petrol 2 Naphtha 3 Kerosene all 4 Diesel
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(an DB)10th class chemistry paper

10th class chemistry paper 2017 federal board
10th class chemistry paper 2017 federal board

10th class chemistry paper 2017

Time allowed: 2:40 Hours Total Marks Sections B and C: 53 10th class chemistry paper
NOTE: Answer any eleven parts from Section ‘B’ and any two questions from Section ‘C’ on them separately
provided an answer book. Use supplementary answer sheet i.e. Sheet-B if required. Write your answers
Neatly and legibly.
A SE EEee
SECTION — B (Marks 33)
Q.2 Attempt any ELEVEN parts. The answer to each part should not exceed 3 to 4 lines. (11 x3 = 33)
i} State law of mass action and derive the expression for equilibrium constant Kc?
C3) State conditions for equilibrium?
{ai} identify Bronsted — Lowry acids and bases in the following reactions


an H.SO, + HO» HSO, ~ HO”
6 CH COOH + HO > CH,COO – HO”
c HS + NH, > NH, + HS
(iv) Solution of sodium Hydroxide (Aw0#) +s commonly used as drain cleaner. If the concentration of OW
son in a solution of VWeOH is 1.0160 ‘Af. Is the solution acidic, basic of neutral? (Prove it)

10th class chemistry paper


{v) What is Alkyl Radical? Convert following into Alkyl Radical:
a Methane b Ethane
(vi) Write at least three characteristics of organic compounds
(wii) Complete the following reactions:
a HC -C = CH +2Br
b. HC -C ach -iCl >
¢ H.C —CH = CH, + KMnG, + HO >
(vil) Draw structural formulas of an alkane. an alkene and an alkyne containing six (06) carbon atoms.
{ix) White the general formula of Amino acid and identify functional groups in it.
(sy Write three functions of protein
Qa) Write the percentage composition of three main components of the atmosphere.
(xii) Define Global warming
Oh) How chemistry help maintain a clean swimming pool? Explain.
(xiv) What do you mean by the quality of water?
(xv) —s- Calculate the percentage of nitrogen in Urea 10th class chemistry paper

SECTION — A (Marks 12)

SECTION — A (Marks 12)
Time allowed: 20 Minutes
NOTE:- Section-A is compulsory. All parts of this section are to be answered on the question paper itself.
It should be completed In the first 20 minutes and handed over to the Centre Superintendent.
Deleting/overwriting is not allowed. Do not use a lead pencil.
Q.1 Circle the correct option i.e. A/B/C / 0. Each part carries one mark.10th class chemistry paper

10th class chemistry paper 2017 last section

(0) What are the units for N,,., +n, = 20,,,?
A. mat.de”’ 8 mol dm* C dim’ mol D. No units
diy Adoubte arrow (=) indicates.
A. Forward reaction 8 Reverse reaction c. Irreversible reaction o Reversible reaction
(ai) Which of the following is a Lewis base?
A BF B HCl c. AICI, Oo. cr
{iv) NH, Cannot be classified as 3 bases by:
A Lewis Theory B. Gronsted — Lowery Theory
c Arrhenius Theory Oo. All of these
(v) Which is alcohol?
A CH ,-CH, -OCH, -CH, B. CH ,-OH
c CH ,-CH, – COOH Oo. CH,-CH,- NH,
(vi) Which compound is not a saturated hydrocarbon?
A. CH,-CH, . 8. CH,
Cc CH ,-CH =CH, 0. CH,-CH,-CH,
(vi) Which product is obtained when chloromethane is reduced?

10th class chemistry paper


A. Ethyne 6. Methane Cc Ethane D Ethene
(viii) Which is used for dehydrohalogenation of Alkyl halides?
An Alcoholic KOH 6. _ Conc. H, SO,
Cc Al,O, 0. Bromine water
(bo. Which is not a dextrose sugar?
A Glucose 6 Mannose c. Fructose 0 Galactose

10th class chemistry paper

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