Which of the following matching is correct? Reagents/ Compounds Impurities removed (a) Anhydrous CaCl 2 Impurities removed are PH 2, AsH 3 (b) Aq. KOH solution Water vapour (c) Aq. Pb(NO 3 ) 2 H 2 S (d) Aq. AgNO 3 solution SO 2 , CO 2

CaCl 2 can absorb water vapour. Aq. KOH is used for removing SO 2 and CO 2 . Pb ( NO 3 ) 2 is used for removing H 2 S gas by forming PbS . Aq. AgNO 3 Solution is an inorganic compound used for removing impurities PH 3 and AsH 3 gases. Therefore, match C is correct.

E M B I B E

All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>CHAPTER EXERCISE>Q 25

MEDIUM

9th ICSE

IMPORTANT

Earn 100

Describe the procedure to prepare and collect hydrogen gas in a laboratory, with suitable diagrams.

Important Questions on Study of First Element-Hydrogen

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>CHAPTER EXERCISE>Q 25

Why Bosch process is preferred over laboratory method for industrial production of hydrogen?

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>CHALLENGERS*>Q 2

H^{+}

ion always get associated with other atoms in molecules because:

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>CHALLENGERS*>Q 5

Which of the following matching is correct?

Reagents/ Compounds	Impurities removed
(a) Anhydrous CaCl₂	Impurities removed are PH_2,AsH₃
(b) Aq. KOH solution	Water vapour
(c) Aq. Pb(NO₃)₂	H₂S
(d) Aq. AgNO₃solution	SO₂, CO₂