UrbanPro

Location Set your Location

Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Your Worksheet is Ready

Download Print Share Generate New Worksheet

CBSE Class 10 Science Worksheet

Unit I: Chemical Substances - Nature and Behaviour - Acids, Bases and Salts

1.
Fill in the blanks: As the H+ ion concentration decreases, the pH value _________.
A) Remains same B) Increases C) Decreases D) None of these
2.

A student was given three solutions marked X, Y and Z, and asked to arrange them in the increasing order
of their pH values. The student put two drops of each solution on three strips of universal indicator paper
separately. The colours shown by the three indicator strips are as follows :

Which of the following gives the correct increasing order of pH values ?

A)

Z < X < Y

 B)

Y < Z < X

 C)

X < Y < Z

 D)

Z < Y < X
3.
State TRUE/FALSE: All metal carbonates react with acid to give a salt, water and carbon dioxide.
A) TRUE B) FALSE
4.

Four students A, B, C and D were asked by their teacher to arrange the set-ups I to IV as given below and
identify the gas, if any, evolved in each case :

A)

A

 B)

B

 C)

C

 D)

D
5.

Which of the following metal strips, when placed in colourless AgNO3 solution, turns the solution blue ?

A)

Fe

 B)

Cu

 C)

Mg

 D)

Zn
6.
State TRUE/FALSE: Higher the pH, stronger the acid.
A) TRUE B) FALSE
7.
Fill in the blanks: The reaction of acids with bases to form salt and water is called __________.
A) Decomposition reaction B) Combination reaction C) Neutralisation
reaction D) Displacement
reaction
8.
In an aqueous solution of HCl which of the following species is not present?
A) H+ B) OH- C) Cl- D) None of these
9.
Fill in the blanks: ___________ acid is found in vinegar.
10.
State TRUE/FALSE: Solution A has pH of 4 and solution B has pH of 5. Solution B has more H+ ions concentration.
A) TRUE B) FALSE
11.

On adding a few drops of universal indicator solution to
three unknown colourless solutions P, Q and R taken
separately in three test-tubes shown in the diagrams, a
student observed the changes in colour as green in solution
P, red in solution Q and violet in solution R.
The decreasing order of the pH of the three solutions is :

A)

P > Q > R

 B)

R > P > Q

 C)

Q > P > R

 D)

R > Q > P
12.

Plaster of Paris can be converted back to ______ by adding water.

A)

Flame

 B)

Gypsun

 C)

Gypsum

 D)

HCl
13.

When HNO3 is mixed with an unknown solution 'X', sodium nitrate is produced. Name the unknown
substance X.

HNO3 + X ⟶ NaNO3 + H2O

A)

NaOH

 B)

Na2SO4

 C)

NaCl

 D)

NaNO2
14.

The table given below shows the reaction of a few elements with acids and bases to evolve Hydrogen gas.

A)

A and D

 B)

B and D

 C)

A and C

 D)

B and D
15.

  1. Which of the following is used for dissolution of gold?




A)

Aqua regia

 B)

Nitric acid

 C)

Sulphuric acid

 D)

Hydrochloric acid
16.

Baking powder is made by mixing Baking soda and

A)

weak base

 B)

weak edible acid

 C)

mild edible acid

 D)

mild edible base
17.
Fill in the blanks: On pH scale, H+ ion concentration and pH are related ____________.
18.

Two nails supported on a rubber cork are dipped in dil. HCl solution as shown. When a potential
difference of 6V is applied through the solution, bulb glows. What will happen when HCl solution is
replaced by glucose solution in the given experiment?

A)

Bulb glows

 B)

Solution will conduct electricity

 C)

Bulb does not glow

 D)

Glucose dissociates into hydrogen ions
19.
Solution A has pH of 10 and solution A has pH of 11. Which solution has more OH- ions concentration?
A) Solution A B) Solution B C) Both have same concentration D) None of these
20.
State TRUE/FALSE: Bases are bitter in taste and feel soapy on touching.
A) TRUE B) FALSE

CBSE Class 10 Science Worksheet

Unit I: Chemical Substances - Nature and Behaviour - Acids, Bases and Salts

Answers

1.
Option B
2.
Option B
3.
Option A
4.
Option C
5.
Option B
6.
Option B
7.
Option C
8.
Option B

9.
Acetic
10.
Option B
11.
Option B
12.
Option C
13.
Option A
14.
Option B
15.
Option A
16.
Option C

17.
Inversely
18.
Option C
19.
Option B
20.
Option A
Download Print Share Generate New Worksheet

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All
ThinkVidya Learning Pvt Ltd © 2010-2024 All Rights Reserved