Science, asked by patelkk49, 6 months ago

SU
into the river
jatic organisms
neutralised
so that
c solutions.
I. Multiple Choice Questions
Tick (V) the correct option:
1. Alkalis turn methyl orange
(a) pink
(b) red
(c) orange
(d) yellow
2. Acids turn blue litmus
(a) yellow
(b) red
(c) orange
(d) green
3. Sodium bicarbonate is also called
(a) washing soda
(b) baking soda
(c) bleaching powder
(d) acid
4. Alum is used for
(a) removing hardness of water
(b) purification of water
(c) killing germs present in water
(d) all of these
5. Which of these is not an indicator?
(a) Turmeric (b) Red cabbage
(c) Litmus solution (d) Acetic acid
6. Which of the following is not a base?
(a) sodium hydroxide
(b) magnesium hydroxide
copper carbonate
(d) ammonium hydroxide
7. The common name of sodium hydroxide is
(a) caustic soda (b) baking soda
(c) phitkari (d) blue vitriol
8. Which of the following is not an acid-base
indicator?
(a) blue litmus
(b) methyl orange
(c) phenolphthalein
(d) digene
II. Fill in the blanks:
1. Phenolphthalein turns
in basic
solutions.
2. The reaction between an acid and a base to form a
salt is called
3. Acids have
taste while bases have
taste.
4.
is a 1 : 3 mixture of conc. HNO
and conc. HCL.
5. Sulphuric acid is also called
6. Acids turn
litmus
III. True or false:
1. Acetic acid is the main constituent
of vinegar.
2. Phenolphthalein turns pink in acidic
solutions.
3. Bases turn red litmus blue.
4. Ca(OH)2 is the chemical formula of
caustic soda.
5. Turmeric is a natural indicator.
Water molecules
at each pH value.
(c)
ACIDS, BASES AND SALTS
ction of an acid with all
which changes colom
Effect of acids on metal
erty of some salts to :
wet or turn into a sol
cture of several ind

Answers

Answered by rahulram9791

Answer:

1.d) yellow

2.b) red

3)c) Bleaching powder

4)d)All of these

5. d) Acetic acid

7. a)caustic soda

8. d) digene

3. True

5. True

Rest of your question isn't clear since you have typed in hurry you have to post them again.

Hope it helps.

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