Page 232 - Chemistry ICSE Class X

218 ICSE Chemistry – 10

ASSIGNMENT 1

Preparation, properties, tests and uses of hydrogen chloride, Tests of chloride ion

ϭ͘ ;ĂͿ EĂŵĞ ƚŚĞ ƌĞĂŐĞŶƚƐ ƌĞƋƵŝƌĞĚ ĨŽƌ ƚŚĞ ƉƌĞƉĂƌĂƟŽŶ ŽĨ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ ŝŶ LJŽƵƌ ůĂďŽƌĂƚŽƌLJ͘
;ďͿ tƌŝƚĞ ƚŚĞ ĐŚĞŵŝĐĂů ĞƋƵĂƟŽŶ ĨŽƌ ƚŚĞ ůĂďŽƌĂƚŽƌLJ ƉƌĞƉĂƌĂƟŽŶ ŽĨ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ͘
Ϯ͘ ,Žǁ ŝƐ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ ĐŽůůĞĐƚĞĚ ĚƵƌŝŶŐ ŝƚƐ ůĂďŽƌĂƚŽƌLJ ƉƌĞƉĂƌĂƟŽŶ͍
ϯ͘ tŚLJ ŝƐ ŝƚ ŶŽƚ ƉŽƐƐŝďůĞ ƚŽ ĐŽŶĐĞŶƚƌĂƚĞ ĚŝůƵƚĞ ƐŽůƵƟŽŶ ŽĨ , ů ďLJ ŚĞĂƟŶŐͬĞǀĂƉŽƌĂƟŽŶ ďĞLJŽŶĚ ϮϮ͘Ϯй ;ďLJ ŵĂƐƐͿ͍
ϰ͘ EĂŵĞ ƚŚĞ ĚƌLJŝŶŐ ĂŐĞŶƚƐ
;ĂͿ ƵƐĞĚ ŝŶ ƚŚĞ ĚƌLJŝŶŐ ŽĨ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ͘
;ďͿ ǁŚŝĐŚ ĐĂŶŶŽƚ ďĞ ƵƐĞĚ ĨŽƌ ĚƌLJŝŶŐ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ͘
ϱ͘ ŶŚLJĚƌŽƵƐ , ů ŝƐ ŶŽŶĐŽŶĚƵĐƚŽƌ͕ ǁŚŝůĞ ĂƋƵĞŽƵƐ ƐŽůƵƟŽŶ ŽĨ , ů ŝƐ ĂŶ ĞdžĐĞůůĞŶƚ ĐŽŶĚƵĐƚŽƌ ŽĨ ĞůĞĐƚƌŝĐŝƚLJ͘ džƉůĂŝŶ͘
ϲ͘ dŚŝĐŬ ǁŚŝƚĞ ĨƵŵĞƐ ĂƌĞ ĨŽƌŵĞĚ ǁŚĞŶ Ă ŐůĂƐƐ ƌŽĚ ĚŝƉƉĞĚ ŝŶ E, K, ŝƐ ďƌŽƵŐŚƚ ŶĞĂƌ ƚŚĞ ŵŽƵƚŚ ŽĨ Ă ũĂƌ ĨƵůů ŽĨ , ů ŐĂƐ͘ tƌŝƚĞ
ϰ
ƚŚĞ ĞƋƵĂƟŽŶ͘
ϳ͘ tŚLJ ŝƐ ĨƵŶŶĞů ƵƐĞĚ ǁŚŝůĞ ƉƌĞƉĂƌŝŶŐ ŚLJĚƌŽĐŚůŽƌŝĐ ĂĐŝĚ ĨƌŽŵ ŚLJĚƌŽŐĞŶ ĐŚůŽƌŝĚĞ ŐĂƐ͍
ϴ͘ EĂŵĞ ƚǁŽ ĐŽůŽƵƌůĞƐƐ ŐĂƐĞƐ ǁŚŝĐŚ ĐŽŵďŝŶĞ ƚŽ ĨŽƌŵ Ă ƐŽůŝĚ͘
ϵ͘ ŽŵƉůĞƚĞ ĂŶĚ ďĂůĂŶĐĞ ƚŚĞ ĨŽůůŽǁŝŶŐ ĞƋƵĂƟŽŶƐ͗
;ĂͿ Wď;EK ) н , ů o _____________
ϯ Ϯ
;ďͿ <DŶK ϰ н , ů o _____________
;ĐͿ ,EK ϯ н , ů o _____________
;ĚͿ Ă;K,Ϳ Ϯ н , ů o _____________
;ĞͿ DŶK Ϯ н , ů o _____________
;ĨͿ Wď K ϯ ϰ н , ů o _____________
; Ő Ϳ Ő E K ϯ н , ů o _____________
–
ϭϬ͘ ĞƐĐƌŝďĞ Ă ƚĞƐƚ ĨŽƌ ĐŚůŽƌŝĚĞ ŝŽŶ ; ů Ϳ͘

Let us Answer Some More Questions

1. Write a balanced chemical equation to obtain hydrogen chloride from (a) Chlorine (b) Common salt
2. Complete the following equation: MnO (s) + 4HCl(aq) o
2
3. Name a compound that will oxidise conc. hydrochloric acid to chlorine.
4. Hydrogen chloride gas is not collected over water. Give reason
5. What is the purpose of using a funnel while preparing hydrochloric acid from hydrogen chloride gas?
6. Hydrogen chloride gas does not conduct electricity, whereas hydrochloric acid conducts electricity. Give reason.
7. Name the drying agent used for drying hydrogen chloride gas. Also name the two reagents which cannot be
used for drying hydrogen chloride.
8. Name the gas produced when chlorine water is exposed to light.
9. Which one of the following metals will not liberate hydrogen gas from hydrochloric acid?
Na, Cu, Fe, Mg
10. Complete and balance the equation,
KMnO 4 + HCl o _______ + _______ + _______ + 8H O
2
11. Why dilute hydrochloric acid cannot be concentrated beyond 20.3% (by mass) by distillation method?
12. How will you show that hydrogen chloride is a covalent compound?
13. Name the anion present in the following compound. The compound A when warmed with concentrated
sulphuric acid gives a gas which fumes in moist air and which gives white fumes with ammonium hydroxide.
14. Give three distinct tests (other than using an indicator) you would carry out with an aqueous solution of hydrogen
chloride to show that it is acidic.