CBSE Class 10th Science Mix Test

Result

CBSE Class 10th Science Mix Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base

A
(i) and (iii)

B
(ii) and (iii)

C
(i) and (iv)

D
(ii) and (iv)
Question 2
1 / -0

Which of the following statements is true with regard to hydrogen? (i) Hydrogen reacts to attain a duplet of electrons in its K shell. (ii) Hydrogen always forms a single covalent bond. (iii) Hydrogen can form a single and a double covalent bond.

A
(i)

B
(i) and (ii)

C
(i) , (ii) and (iii)

D
(i) and (iii)
Question 3
1 / -0

Which of the following compounds of carbon does not consist of ions?

A
CHCl₃

B
CaCO₃

C
NaHCO₃

D
Ca₂C
Question 4
1 / -0

Which of the following statements is not true? (i) In the earth's crust carbon is present in the form of minerals. (ii) In the atmosphere very less amount of carbon is present. (iii) In the earth's crust very large amount of carbon is present.

A
(i)

B
(i) and (iii)

C
(iii)

D
(ii) and (iii)
Question 5
1 / -0

An element reacts with oxygen to give a compound with high melting point. This compound is also soluble in water. The element is likely to be

A
Calcium

B
Carbon

C
Silicon

D
Iron
Question 6
1 / -0

Which of the following pairs will give displacement reaction

A
NaCl solution and copper metal

B
MgCl2 solution and aluminium metal

C
FeSO4 solution and silver metal

D
AgNO3 solution and copper meta
Question 7
1 / -0

An iron nail is dipped in copper sulphate solution. It is observed that

A
The colour 0f the solution remain unchanged

B
The colour 0f the solution becomes red

C
The colour of the solution turns to light green

D
None of these
Question 8
1 / -0

Which of the following is not true for metalloids?

A
They are borderline elements that exhibit both metallic and non metallic properties to some extent

B
They usually act as electron donors with non-metals and as electron acceptors with metals

C
Some of these elements are boron, silicon and germanium

D
They are good conductors of heat and electricity
Question 9
1 / -0

For a given value of 'n', the ionization energy is highest for a

A
D-electrons

B
F-electrons

C
P-electrons

D
S-electrons
Question 10
1 / -0

Which of the following statement (s) about the Modern Periodic Table are incorrect (i) The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number (ii) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses (iii) Isotopes are placed in adjoining group (s) in the Periodic Table (iv) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number

A
(i) only

B
(i), (ii) and (iii)

C
(i), (ii) and (iv)

D
(iv) only
Question 11
1 / -0

Which of the following is the correct order of decreasing first ionization energy:

A
C > B > Be > Li

B
C > Be > B > Li

C
B > C > Be > Li

D
Be > Li > B > C
Question 12
1 / -0

The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?

A
1

B
2

C
3

D
4
Question 13
1 / -0

When batteries are places in a flashlight, the positive terminal of one is connected to the negative terminal of the next. Why?

A
So electricity can flow from the battery to the flashlight to a complete circuit

B
So the current is slowed as it enters the next battery

C
So the voltage is increased as it enters the next battery

D
So electromagnetic interference is reduced
Question 14
1 / -0

A parallel plate capacitor contains a positively charged plate on the left, and a negatively charged plate on the right. An electron in between the plates is moved to the right. Which statement is true?

A
The potential energy of the electron is increasing and it is moving to a region having a lower potential

B
The potential energy of the electron is increasing and it is moving to a region having a higher potential

C
The potential energy of the electron is decreasing and it is moving to a region having a lower potential

D
The potential energy of the electron is decreasing and it is moving to a region having a higher potential
Question 15
1 / -0

Which of the following property of a proton can change while it moves freely in a magnetic field? ( there may be more than one correct answer)

A
Mass

B
Speed

C
Density

D
Momentum
Question 16
1 / -0

Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is

A
33 watt

B
67 watt

C
100 watt

D
300 watt
Question 17
1 / -0

The electric field 2.8 cm from a small object points towards the object points towards the object with a strength of 180,000N/C. what is the object's charge

A
+17nC

B
-16nC

C
-17nC

D
+16nC
Question 18
1 / -0

The value of the following is given by 100 (kilo ampere ) x ( micro ampere ) 100 milli ampere * 10 ampere

A
0.001 A

B
0.1 A

C
1 A

D
10A

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Re-Attempt Weekly Quiz Competition

CBSE Class 10th Science Mix Test - 2

Result

CBSE Class 10th Science Mix Test - 2

Score

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Rank

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SHARING IS CARING

Question 1

(i) and (iii)

(ii) and (iii)

(i) and (iv)

(ii) and (iv)

Question 2

(i)

(i) and (ii)

(i) , (ii) and (iii)

(i) and (iii)

Question 3

CHCl3

CaCO3

NaHCO3

Ca2C

Question 4

(i)

(i) and (iii)

(iii)

(ii) and (iii)

Question 5

Calcium

Carbon

Silicon

Iron

Question 6

NaCl solution and copper metal

MgCl2 solution and aluminium metal

FeSO4 solution and silver metal

AgNO3 solution and copper meta

Question 7

The colour 0f the solution remain unchanged

The colour 0f the solution becomes red

The colour of the solution turns to light green

None of these

Question 8

They are borderline elements that exhibit both metallic and non metallic properties to some extent

They usually act as electron donors with non-metals and as electron acceptors with metals

Some of these elements are boron, silicon and germanium

They are good conductors of heat and electricity

Question 9

D-electrons

F-electrons

P-electrons

S-electrons

Question 10

(i) only

(i), (ii) and (iii)

(i), (ii) and (iv)

(iv) only

Question 11

C > B > Be > Li

C > Be > B > Li

B > C > Be > Li

Be > Li > B > C

Question 12

1

2

3

4

Question 13

So electricity can flow from the battery to the flashlight to a complete circuit

So the current is slowed as it enters the next battery

So the voltage is increased as it enters the next battery

So electromagnetic interference is reduced

Question 14

The potential energy of the electron is increasing and it is moving to a region having a lower potential

The potential energy of the electron is increasing and it is moving to a region having a higher potential

The potential energy of the electron is decreasing and it is moving to a region having a lower potential

The potential energy of the electron is decreasing and it is moving to a region having a higher potential

Question 15

Mass

CHCl₃

CaCO₃

NaHCO₃

Ca₂C