Worksheets10class Physical science Grand Test 4
Total questions: 40
Worksheet time: 30mins
Name
Class
Date
1.
During dispersion this colour deviates most
a)
Red
b)
Violet
c)
Blue
d)
Green
2.
The power of a convex lens is
a)
Positive
b)
Negative
c)
No power
d)
Zero
3.
The electronic structure of the atom that is correctly explained by Bohrs theory is _______
a)
hydrogen atom
b)
helium atom
c)
carbon atom
d)
all atoms
4.
When a current of ______ Amperes flows through our body for 2 seconds it is fatal
a)
0.07
b)
0.015
c)
0.005
d)
0.010
5.
When Magnesium oxide reacts with HCl, ___ and water are formed.
a)
Mg2Cl
b)
MgCl2
c)
MgCl3
d)
MgCl
6.
Which group elements are called Halogen family
a)
17 (VllA)
b)
18(VIIIA)
c)
15(VA)
d)
16(VIA)
7.
When Magnesium metal reacts with HCl, MgCl2 and _____ are formed
a)
Water
b)
Hydrogen gas
c)
Oxygen gas
d)
Water and Hydrogen
8.
The orbital which is in spherical shape is
a)
s
b)
p
c)
d
d)
f
9.
When KHCO3 reacts with HCl then___ , Water and Carbondioxide are formed.
a)
KCl
b)
Base
c)
Hydrogen
d)
Oxygen
10.
Rainbow is a natural phenomenon showing
a)
Reflection
b)
Deflection
c)
Dispersion
d)
Diversion
11.
When Na2CO3 reacts with HCl then NaCl, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
12.
In curved mirrors magnefication is ______for inverted image
a)
Possitive
b)
Negative
c)
No sign
d)
Any sign
13.
When NaHCO3 reacts with H2SO4 then Na2SO4, ___ and____ are formed.
a)
Carbon dioxide, Water
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
14.
When KHCO3 reacts with HCl then KCl, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
15.
When NaHCO3 reacts with H2SO4 then ___ , ___ and water are formed.
a)
Na2SO4, Carbon dioxide
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
16.
When Na2CO3 reacts with HCl then ___ , ___ and carbon dioxide are formed.
a)
NaCl, water
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
17.
Gallium is named by mendeleeff as
a)
eka-boran
b)
eka-alluminium
c)
eka-silicon
d)
none of these
18.
_______ move from high potential to low potential.
a)
Electrons
b)
Protons
c)
Neutrons
d)
Atoms
19.
Mg(OH)2 is (Acid, Base, Salt, Acidic salt)
a)
Acid
b)
Base
c)
Salt
d)
Acidic salt
20.
Which mirrors are used as rear view mirrors
a)
Convex
b)
Concave
c)
Plane
d)
None
21.
What is produced by the action of chlorine on dry slaked lime?
a)
Washing soda
b)
Bleaching powder
c)
Plaster of Paris
d)
Baking soda
22.
When KHCO3 reacts with HCl then KCl, Water and____ are formed.
a)
Carbon dioxide
b)
Base
c)
Hydrogen
d)
Oxygen
23.
What is image distance, if focal length is 20cm, object placed at 30cm is on the principal axis of convex lens
a)
60cm
b)
80cm
c)
40cm
d)
20cm
24.
The color of Methyle Orange in NaOH is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
25.
The power of convex lens is
a)
0
b)
>0
c)
<0
d)
Infinity
26.
Identify the week acid from Vinegar, Milk, Lemon juice and Battery acid
a)
Milk
b)
Vinegar
c)
Lemon juice
d)
Battery acid
27.
What are the values of spin quantum number
a)
+1/2
b)
-1/2
c)
+1/2, -1/2
d)
none of these
28.
When the object is between F and P before convex lens the image size is
a)
Equal to object
b)
Bigger than object
c)
Small than Object
d)
Point size
29.
Identify the strong acid from Vinegar, Milk, Lemon juice and Battery acid
a)
Milk
b)
Vinegar
c)
Lemon juice
d)
Battery acid
30.
Which of the following elements is electronegative(sodium , Oxygen, megnesium, calcuim)
a)
sodium
b)
Oxygen
c)
megnesium
d)
calcuim
31.
Where should we place the object, to get image at infinity
a)
Between F and C
b)
Beyond C
c)
Between P and F
d)
At F
32.
The reducing agent in thermite process is
a)
Al
b)
Fe
c)
Sl
d)
Mg
33.
When metal a carbonate reacts with an acid then___ , Water and Carbondioxide are formed.
a)
Salt
b)
Base
c)
Hydrogen
d)
Oxygen
34.
NH4Cl is (Acid, Base, Salt, Acidic salt)
a)
Acid
b)
Base
c)
Salt
d)
Acidic salt
35.
The mid point of thin lens is called
a)
Center of curvature
b)
Optic center
c)
Focus
d)
Ortho center
36.
The color of Red litmus paper in HCl is
a)
Blue
b)
Yellow
c)
Pink
d)
No colour change
37.
This is a process of refining of metal
a)
Distillation
b)
Roasting
c)
Smelting
d)
Calcination
38.
The angle between normal and reflected ray is called
a)
angle of normal
b)
angle of reflection
c)
angle of ray
d)
angle of incidence
39.
The color of Phenophthalein in NaOH is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
40.
1 coulumb electric charge is equal to charge of this number of electrons
a)
6.625 X 10^10
b)
6.625 X 10^8
c)
6.625 X 10^18
d)
6.625 X 10^32
100 %
