Question

Sales have var
12. A milla
(a) W
(b) W
13. Plastel
14. What
15. Givet
EX E RCI SE S
(d) 10
4
Gr
1. A solution turis red litmus blue, ils pH is likely to be
(a) 1
[b]
(c) 5
2. A solution reacts with crushed egg-shells to give a gas that turns lime-water milky.
The solution contains
(a) NaCl
(b) HCl
(c) LC1
(d) KCI
3. 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a
given solution of HCL If we take 20 mL of the same solution of NaOH, the amount
HCl solution (the same solution as before) required to neutralise it will be
(a) 4 ml
(b) 8 mL
(c) 12 mL
(d) 16 mL
4. Which one of the following types of medicines is used for treating indigestion?
(a) Antibiotic
(b) Analgesic
(c) Antacid
(d) Antiseptic
(1) Prepare
Crus
Ada
Filte
Colle
Arra
2 ml
in th
5. Write word equations and then balanced equations for the reaction taking
place when -
(a) dilute sulphuric acid reacts with zine granules.
(b) dilute hydrochloric acid reacts with magnesium ribbon.
(c) dilute sulphuric acid reacts with aluminium powder.
(d) dilute hydrochloric acid reacts with iron filings.
6. Compounds such as alcohols and glucose also contain hydrogen but are not
categorised as acids Describe an Activity to prove it
7. Why does distilled water not conduct electricity, whereas rain water does?
Put
If an
You
cabi
Ger
Acids, Bases an
34
Srience​

Answer 1

Answer:

Please write in short

Explanation:

Please mark as brainliest

Answer 2

Answer:

ANS:- 10

The solution which turns red litmus to blue is basic in nature The pH value of base solution is greater than 7.

Explanation:

ANS:- Answer:

HCl is reacts with "crushed eggshells" to yeild a gas that turns "lime-water milky"

Option (b).

Explanation:

As we know that eggshells have calcium carbonat

$(CaCO_3)(CaCO </p><p>3$

) in it. When CaCO_3CaCO

3

reacts with HCl, the reaction produces "Calcium chloride"

$(CaCl_2),(CaCl </p><p>2</p><p> </p><p> ), Carbon dioxide(CO_2)(CO </p><p>2</p><p> </p><p> ) and water (H_2 O).(H </p><p>2</p><p> </p><p> O).</p><p></p><p>Ca C o_{3}+2 H C l \rightarrow C a C l_{2}+C o_{2}+H_{2} OCaCo </p><p>3</p><p> </p><p> +2HCl→CaCl </p><p>2</p><p> </p><p> +Co </p><p>2</p><p> </p><p> +H </p><p>2</p><p> </p><p> O$

$\mathrm{Ca}(\mathrm{OH})_{2} \mathrm{CO}_{2} \rightarrow \mathrm{CaCo}_{3}+\mathrm{H}_{2} \mathrm{O}Ca(OH)$

$</p><p>2</p><p> </p><p> CO </p><p>2</p><p> </p><p> →CaCo </p><p>3</p><p> </p><p> +H </p><p>2</p><p> </p><p> O$

when calcium hydroxide is treated with carbondioxide the lime water turns milky.

$CO_2CO </p><p>2</p><p>$

is the gas that will turn the lime water

$(Ca(OH)_2)(Ca(OH) </p><p>2$

milky because it will form the calcium carbonate, which is a white precipitate.

Solution :

Ans:-10 mL of NaOH will require HCl = 8 mL and 20 mL of NaOH will require HCl= 16 mL. Therefore, (d) is the correct answer.

Ans:-Antacid is used for indigestion.