Worksheets10class Polycet Test 5
Total questions: 60
Worksheet time: 30mins
Name
Class
Date
1.
During dispersion in raindrop, angle between violet and red rays in second refraction is _______ first refraction.
a)
less
b)
more
c)
equal to
d)
No deviation
2.
When metal a hydrogen carbonate reacts with an acid then Salt, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
3.
Cl size is ___than Cl ion
a)
more
b)
less
c)
equal
d)
none
4.
The shape of the rainbow as seen from an air plane during mid day is
a)
Semi circle
b)
Conical
c)
Circle
d)
Spherical
5.
The red colour of sun during sunset and sunrise is due to
a)
Reflection
b)
Refraction
c)
Dispersion
d)
Scattering
6.
This process is used for the purification of low boiling metals
a)
Distillation
b)
Roasting
c)
Smelting
d)
Calcination
7.
If l=1 for an atom, then the maximum number of electrons in sub shells is
a)
2
b)
4
c)
6
d)
8
8.
At minimum angle of deviation, if angle of incidence is 42 degrees then angle of emergence is
a)
0
b)
90
c)
180
d)
42
9.
When KHCO3 reacts with H2SO4 then K2SO4, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
10.
Metalloids are also called
a)
Partial metals
b)
Semi metals
c)
Colloids
d)
Non-colloids
11.
The p in pH stands for
a)
Power
b)
Profit
c)
Potenz
d)
Pole
12.
When NaHCO3 reacts with H2SO4 then Na2SO4, ___ and____ are formed.
a)
Carbon dioxide, Water
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
13.
What is the formula of bleaching powder?
a)
CaOCl2
b)
CaCl2
c)
Ca(OH)2
d)
CaOCl3
14.
A person with ______can see the distant objects usually but cannot see objects at far distances
a)
Myopia
b)
Hypermetropia
c)
Presbyopia
d)
None
15.
By 1865 how many elements were discovered artificially?
a)
16
b)
17
c)
63
d)
91
16.
By 1865 how many elements were discovered from natural resources?
a)
16
b)
63
c)
91
d)
17
17.
This energy is stored in a battery
a)
Electric energy
b)
Potential energy
c)
Chemical energy
d)
Current energy
18.
VIIA group elements are called ___.
a)
Chalkogens
b)
Noble elements
c)
Halogens
d)
Alkali metals
19.
When Calcium metal reacts with HCl, CaCl2 and _____ are formed
a)
Water
b)
Hydrogen gas
c)
Oxygen gas
d)
Water and Hydrogen
20.
The quantum number which explains about the shape of the orbital is
a)
Principal quantum number
b)
Angular momentum quantum number
c)
Magnetic quantum number
d)
Spin quantum number
21.
When resistance of our body increases, the current flow
a)
increases
b)
decreases
c)
reamains same
d)
cannot say
22.
The process of addition of powdered lime to water
a)
Physical change
b)
Chemical change
c)
Not a change
d)
No answer
23.
Noble gases belong to ______ group of periodic table.
a)
I
b)
II
c)
VII
d)
VIII
24.
The fixed arrangement of positive ions is called
a)
molecule
b)
compound
c)
lattice
d)
crystal
25.
If l=0 for an atom, then the number of orbitals in sub shell is
a)
0
b)
1
c)
2
d)
3
26.
In H2SO4, HCl,CH3COOH,HNO3 the weak acid is
a)
H2SO4
b)
HCl
c)
CH3COOH
d)
HNO3
27.
If l=1 for an atom, then the number of orbitals in sub shell is
a)
0
b)
1
c)
2
d)
3
28.
The maximum number of electrons present L - shell is
a)
2
b)
4
c)
8
d)
16
29.
Which one of the following elements occur in free state (phosporus, sulphur, silicon, gold)
a)
Phosporus
b)
Sulphur
c)
Silicon
d)
Gold
30.
If we place an object at 30cm distance infront of concave mirror of 20 cm focal length, then where does image form
a)
20 cm
b)
30 cm
c)
40 cm
d)
beyond 40 cm
31.
In electro-magnetic spectrum i.e., visible and invisible light, the radiation with short wave length is
a)
Gamma rays
b)
UV rays
c)
IR rays
d)
Radio waves
32.
Concave mirror is used
a)
by Dentists
b)
In car head lights
c)
In car head lights & by Dentists
d)
No answer
33.
Accordng to Mendeleeff physical and chemical properties of elements are periodic functions oftheir
a)
Atomic volume
b)
Atomic weight
c)
Atomic number
d)
Electronic configuration
34.
______are used to make diodes
a)
Metals
b)
Non-metals
c)
Semi-conductors
d)
None
35.
The unit of efficiency of an electric bulb is
a)
Volt
b)
Amphere
c)
Watt
d)
Joule
36.
This is a physical change
a)
The process of rusting of iron
b)
The process of addition of powdered lime to water
c)
The process of Respiration is
d)
Melting of ice to water
37.
This current in Ampere, when passes through a human body, causes loss of muscle control
a)
0.001
b)
0.005
c)
0.01
d)
0.015
38.
A person is standing on the bank of a river. A fish inside water will see the person to be
a)
taller
b)
shorter
c)
original height
d)
depends on fish
39.
When Na2CO3 reacts with H2SO4 then Na2SO4, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
40.
If low boiling metals like ____ have high boiling metals as impurities then, Distillation is used for refining.
a)
Zinc, Mercury
b)
Copper, Iron
c)
Iron, Alluminum
d)
Platinum
41.
If the pH value of the solution is 8, then the solution is
a)
Base
b)
Strong Base
c)
Strong Acid
d)
Acid
42.
When a current of 0.0024 A flows through our body this happens
a)
It will be painful
b)
It can be felt
c)
functoning of body organs gets disturbed
d)
Causes loss of muscele control
43.
When Magnesium metal reacts with _____ , Hydrogen gas and MgCl2 are formed
a)
Water
b)
HCl
c)
Oxygen gas
d)
Water and Hydrogen
44.
If f=10cm and u=15cm and object is placed perpendicular to the principal axis of a convex lens and (v) image distance?
a)
30cm
b)
25cm
c)
40cm
d)
15cm
45.
When a metal oxide reacts with acid, ___ and ______ are formed.
a)
Water and Hyderogen gas
b)
Water and oxygen
c)
Salt and water
d)
Salt and chlorine
46.
"Watt" is the unit of
a)
Specific resistance
b)
Power
c)
Work
d)
Potential differences
47.
Which principle rule states that two electrons of the same atom cannot have all four same quantum numbers?
a)
Pauli's exclusion principle
b)
Aufbau's principle
c)
Hund's rule
d)
Fermat principle
48.
When the object is at infinite distance the focal length of eye lens is
a)
25 cm
b)
2.27 cm
c)
2.5 cm
d)
2.5 m
49.
Identify the element from Chalcogen family in modern periodic table of elements
a)
F
b)
As
c)
Se
d)
Cl
50.
This is a process of refining of metal
a)
Liquation
b)
Roasting
c)
Smelting
d)
Calcination
51.
If 20 Coulombs charge flows in 5 seconds at a cross section, then current is
a)
100 Amperes
b)
15 Amperes
c)
4 Amperes
d)
4 Volts
52.
When a current of 0.001 A flows through our body this happens
a)
It will be painful
b)
It can be felt
c)
functoning of body organs gets disturbed
d)
Causes loss of muscele control
53.
The touch of Mg(OH)2 is
a)
Spines
b)
Hard
c)
Soapy
d)
None
54.
Generally the minimum resistance of human body is
a)
500000 ohm
b)
100000 ohm
c)
1000 ohm
d)
100 Ohm
55.
Identify the correct pair
a)
Cones---Intensity of light
b)
Rods--- Color
c)
Ciliary musceles--rods
d)
None
56.
The n+l value of 3p orbital is
a)
4
b)
3
c)
5
d)
6
57.
The near point of a person is at d cm. The focal length of the conv lens to be used is
a)
d cm
b)
25d cm
c)
d - 25 cm
d)
25d/(d - 25 cm)
58.
1 Armstrong is = ……. Meter
a)
10^-7m
b)
10^-8m
c)
10^-9m
d)
10^-10m
59.
H3PO4 is (Acid, Base, Salt, Basic salt)
a)
Acid
b)
Base
c)
Salt
d)
Basic salt
60.
The reducing agent in thermite process is
a)
Al
b)
Fe
c)
Sl
d)
Mg
100 %
