Page 2 - HOME ASSIGNMENT-2(CH-2-PRACTICE WORK SHEET

Q.7 HCl and HNO3 show acidic characteristics in aqueous solution while alcohol and
glucose solutions do not.Give reasons.[CBSE2011]

Q.8 (i) Solid calcium oxide was taken in a container and water was added slowly to it.
(a) Write the observations.
(b) Write the chemical formula of the product formed.
(ii) What happens when carbon dioxide is bubbled
through lime water (a) in small amount (b) inexcess? [CBSE 2013, 2012, 2010]

Q.9An aqueous solution of metal nitrate ‘P’ reacts with
sodium bromide solution to form yellow precipitate
‘Q’ which is used in photography. ‘Q’ on exposure to sunlight undergoes
decomposition to form metal present along with a reddish brown gas. Identify
‘P’ and ‘Q’ write the balanced chemical equation for the chemical reaction. List
the two categories in which reaction can be placed. [CBSE 2012]
Q.10 State the reason for the following statements:
a. Tap water conducts electricity whereas distilled
water does not.
b. Dry hydrogen chloride gas does not turn blue
litmus red whereas dilute hydrochloric acid does.
c. During summer season, a milkman usually adds a
very small amount of baking soda to fresh milk.
d. For dilution of an acid, acid is added to water and
not water to acid.
e. Ammonia is a base but it does not contain hydroxyl group.
[CBSE 2015]

2