A) FILL IN THE BLANKS by using the correct word or word/words given within the brackets:
a) A reaction between a base and an acid in their solutions to produce salts and water only is called .....reaction. (double decompositio /neutralization)
b) All nitrates of metals are___.
(soluble/insoluble)
c) Sodium chloride(NaCl) is___ salt. ( hydrated and anhydrous)
d) Chemical name of of washing soda is ___.(sodium carbonate/ sodium sulphatephate )
e) Sodium potassium sulphate is a____(complex salt/ mixed salt)
f) The number of replaceable hydroxide ions (OH-) formed by one molecule of a base in water is known as --- (acidity/basicity)
g) An acid used to remove ink-stains is __.
( nitric acid/oxalic acid)
h) Ammonium chloride is a soluble salt prepared by_____.
(precipitation/neutralization)
B) NAME THE FOLLOWING:
1) Three metal that can form bases when treated with water.
2) A strong acid containing chlorine.
3) Two Dibasic acids containing sulphur.
4) Two monobasic acids containing nitrogen.
5) Products obtained when lime water dries up.
6) Two deliquescent substances.
7) Two afflorescent substances.
8) Chemical name and chemical formula of washing soda.
9) Chemical name and chemical formula of Glauber's salt.
10) Chemical name chemical formula of Epsom salt.
11) A metal sulphate other than lead and barium, insoluble in water.
12) An acid used as a flavour and to reserve food.
13) An acid used in aerated drinks.
14) An acid used to remove ink spots.
15) An acid used as an eye-wash.
16) The ion responsible for the blue colour of an aqueous solution of a salt.
17) A salt of zinc which is efflorescent.
18) A basic oxide which is soluble in water.
19) A hydroxide which is highly soluble in water.
20) A basic oxide which is insoluble in water.
21) A hydroxide which is insoluble in water.
22) A weak mineral acid.
23) A base which is not an alkali.
24) A monobasic base.
25) A crystalline salt which does not contain water of crystallization.
26) An acid used in cooking food.
27) Two bases which are not alkalis, i.e., insoluble bases.
28) A normal salt and an acid salt of the same acid.
29) A salt insoluble in cold water but soluble in hot water.
C) STATE whether TRUE or FALSE
1) Among CH₃COO and OH⁻ ions, OH⁻ ion is stronger.
2) A solution with pH less than zero or greater than 14 cannot be prepared.
3) The more acidic the solution, the greater its pH.
4) Alkalis do not precipitate insoluble metal hydroxide from their salt solution.
5) Oxalic acid age used in cooking.
6) Boric acid is used as an eye-wash.
7) Mineral acids are inorganic acids.
8) An acid which contains oxygen along with hydrogen and one more element is called hydracid.
9) Dilute acids do not react with metallic oxides.
10) Most of the mineral acids have corrosive action on skin.
D) CHOOSE THE CORRECT ANSWER from a,b,,c,d
1) If some acid is added is added to an aqueous solution solution, its pH will:
a) increase b)decrease
c) remains the same
d) first increase and then decrease.
2) An acid is is called strong acid if it:
a) ionizes almost completely
b) react only on heating
c) react even at room temperature
d) none of these these.
3) If the pH of a solution is 5, it is:
a) strongly acidic b) basic
c) neutral d) weakly acidic
4) Tartaric acid is used:
a) in a baking powder
b) as an eye-wash
c) in cooking
d) to remove ink-stains
5) Acetic acid is:
a) a normal acid
b) a weak acid
c) a strong acid
d) neither weak nor strong acid.
6) Ammonium nitrate on heating decomposes to give.
a) nitrogen dioxide and oxygen
b) nitrous oxide and water
c) nitrogen dioxide and water
d) nitrous oxide and oxygen.
7) In the laboratory,Lead(II) nitrate is prepared by:
a) dilute HCl and lead(II) carbonate.
b) dilute nitric acid and lead(II) carbonate.
c) dilute sulphuric acid and lead(II) carbonate.
d) concentrated nitric acid and lead (II) carbonate.
8) Base Calcium hydroxide is used:
a) in removing grease stains
b) in softening water
c) in fire extinguishers
d) as an antacid.
9) A normal salt:
a) contains one replaceable hydrogen atom in its molecule
b) exhibits the properties of an acid.
c) does not exhibit the properties of an acid.
d) contains three replaceable hydrogen atoms in its molecule.
10) Mohr's salt, FeSO₄(NH₄)₂SO₄.6H₂O is a:
a) basic salt b) double salt
c) mixed salt c) Complex salt
11) Which of the following hydroxide is a not an alkali.
a) Ammonium hydroxide.
b) Calcium hydroxide
c) Copper hydroxide
d) Sodium hydroxide.
E) DEFINE:
a) Water of crystallization
b) Anhydrous.
c) acid
d) Acid anhydride
e) Alkalis
f) Acid salt
g) base
h) Dibasic acids
i) Diabasic base
j) double salt
k) deliquescent substances
l) efflorescent substances
m) Hydracid
n) monobasic acid
o) monoacidic base
p) Mixed salt
q) neutralisation
r) normal salt
s) Oxyacids
t) strong acid
u) strong base
v) salts
w) weak acid
x) weak base
y) Triacidic base
z) Tribasic acids.
a) pH scale
F) REASON BEHIND:
a) Hydrochloric acid considered as a strong whereas acetic acid is a weak acid.
b) Sodium hydroxide is a monobasic acid.
c) Universal indicator is more meaningful than an ordinary indicator.
G) GIVE ONE TEST THE DIFFERENCE:
a) Sodium nitrate solution and the sodium chloride solution.
b) Iron(III) chloride sodium chloride solution and copper chloride solution.
) QUESTION
a) In what factors does the strength of an acid depend!
b) Give chemical names of the following
I) blue vitriol
ii) white vitriol
c) What is the action of hot Alkalis on an Ammonium salt? Give one action.
d) What do you understand by this statement: Acetic acid is a monobasic acid?
e) When a dilute acid reacts with a metal, a gas is produced. What is the name of this gas?
f) How would you obtain an acid from a non-metal ? Give Equation.
g) How would you obtain a base from a metal oxide ? Give Equation.
h) Two acids A and B have pH values 1 and 5 respectively. Which is a stronger acid. A or B?
i) Write the balanced equation for the following reaction: chlorine gas is passed through an aqueous solution of iron((II) sulphate acidified dilute sulphuric acid.
j) What is observed when neutral litmus solution is added to sodium hydrogen carbonate solution?
k) Write balanced chemical chemical equation for the following reaction reaction
i) Calcium bicarbonate and dilute hydrochloric acid
ii) Lead chloride from lead nitrate solution and sodium chloride solution.
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