NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination

NCERT Solutions for Class 7 Science Chapter 10 Control and Coordination

NCERT Books Solutions For Class 10 Science Chapter 7 Control and Coordination

NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination is the first stepping stone for a student in the competitive world. With the introduction of the CBSE Board Exam for class 10 a few years back, this has become an important gateway for a student as based on the results of class 10th a student selects his future stream of Science, Commerce, or Arts.

Takshila Learning provides you with detailed and well explained NCERT Solutions for Class 10 of each chapter of each subject for NCERT Class 10. These NCERT Solutions help you to easily understand every concept so that you can score high in your CBSE Class 10 Board Exams.

Below you can find the NCERT solution for Class 10th Science. You can get a Solution for the all-important question of “Chapter 7 Class 10 Control and Coordination”

Questions Covered In NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination

Page Number – 18

Ques 1: You are given three test tubes. The three test tubes contain distilled water,
acidic solution and the basic solution respectively. There is only red litmus paper
available in order to identify what is there in each test tube. How will you find out
what is in each of the test tubes?

Page Number – 22

Ques 1: Why should curd and sour substances not be kept in brass and copper
vessels?

Ques 2: Which gas is usually liberated when an acid reacts with a metal? Illustrate
with an example. How will you test for the presence of this gas?

Ques 3: Metal compound A reacts with dilute hydrochloric acid to produce
effervescence. The gas evolved extinguishes a burning candle. Write a balanced
chemical equation for the reaction if one of the compounds formed is calcium
chloride.

Pg. No. 25

Ques 1: Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while
solutions of compounds like alcohol and glucose do not show acidic character?

Ques 2: Why does an aqueous solution of an acid conduct electricity?

Ques 3: Why does dry HCl gas not change the colour of the dry litmus paper?

Ques 4: While diluting an acid, why is it recommended that the acid should be added
to water and not water to the acid?

Ques 5: How is the concentration of hydronium ions (H3O+) affected when a solution
of an acid is diluted?

Ques 6: How is the concentration of hydroxide ions (OH– ) affected when excess base
is dissolved in a solution of sodium hydroxide?

Pg. No. 33

Ques 1: You have two solutions, A and B. The pH of solution A is 6 and the pH of the solution
B is 8. Which solution has more hydrogen ion concentration? Which of these is acidic
and which one is basic?

Ques 2: What effect does the concentration of H+(aq) ions have on the nature of the
solution?

Ques 3: Do basic solutions also have H+(aq) ions? If yes, then why are these basic?

Ques 4: Under what soil condition do you think a farmer would treat the soil of his
fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk
(calcium carbonate)?

Pg. No. 34

Ques 1: What is the common name of the compound CaOCl2?

Ques 2: Name the substance which on treatment with chlorine yields bleaching
powder

Ques 3: Name the sodium compound which is used for softening hard water.

Ques 4: What will happen if a solution of sodium hydrocarbonate is heated? Give the
equation of the reaction involved.

Ques 5: Write an equation to show the reaction between Plaster of Paris and water.

EXERCISE

Ques 1: A solution turns red litmus blue, its pH is likely to be –
a) 1
b) 4
c) 5
d) 10

Ques 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) LiCl
d) KCl

Ques 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

Ques 4: Which one of the following types of medicines is used for treating
indigestion?
a) Antibiotic
b) Analgesic
c) Antacid
d) Antiseptic

Ques 5: Write word equations and then balanced equations for the reaction taking
place when
(a) Dilute sulphuric acid reacts with zinc 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.

Ques 6: Compounds such as alcohols and glucose also contain hydrogen but are not
categorized as acids. Describe an Activity to prove it.

Ques 7: Why does distilled water not conduct electricity, whereas rain water does?

Ques 8: Why do acids not show acidic behaviour in the absence of water?

Ques 9: : Five solutions A,B,C,D and E when tested with universal indicator showed pH
as 4,1,11,7 and 9, respectively. Which solution is
(a)Neutral?
(b)Strongly alkaline?
(c) Strongly acidic?
(d)Weakly acidic?
(e)Weakly alkaline?

Ques 10: Equal lengths of magnesium ribbons are taken in test tubes A and B.
Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added
to test tube B. Amount and concentration taken for both the acids are same. In which
test tube will the fizzing occur more vigorously and why?

Ques 11: Fresh milk has a pH of 6. How do you think the pH will change as it turns
into curd? Explain your answer.

Ques 12: A milkman adds a very small amount of baking soda to fresh milk.
(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
(b) Why does this milk take a long time to set as curd?

Ques 13:Plaster of Paris should be stored in a moisture-proof container. Explain
why?

Ques 14: What is a neutralization reaction? Give two examples.

Ques 15: Give two important uses of washing soda and baking soda.

 

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NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination Questions Answers

NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination
NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination
NCERT Solutions For Class 10 Science Chapter 7 Control and Coordination
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