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Worksheets10class Polycet Test 9
Total questions: 60
Worksheet time: 30mins
Name
Class
Date
1.
The product of potential difference and the current is called
a)
Electric power
b)
Electric potential
c)
Resistance
d)
Magnetic flux
2.
The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/u=
a)
1/v-1/u=1/f
b)
v+u=f
c)
v-u=f
d)
1/u=1/f-1/v
3.
The electical appliance that gives steady e.m.f. is
a)
Ammeter
b)
Voltameter
c)
Motor
d)
Battery
4.
If the pH value of the solution is 6, then the solution is
a)
Base
b)
Strong Base
c)
Strong Acid
d)
Acid
5.
S.I unit of the power of a lens is
a)
Dioptre
b)
cm
c)
metre
d)
watt
6.
When a refracted ray is distracted from its original path this is called
a)
reflection
b)
refraction
c)
Scattering
d)
dispersion
7.
H2O + ____ --> H3O+
a)
H+
b)
OH-
c)
H2
d)
H3
8.
Identify the wrong Dobereiner triad
a)
Mn, Cr, I
b)
Li, Na, K
c)
Mn, Cr, Fe
d)
Cl, Br, I
9.
In H2CO3, CH3COOH, HNO3, H3PO4 the strong acid is
a)
H3PO4
b)
HNO3
c)
H2CO3
d)
CH3COOH
10.
If l=3 for an atom, then the maximum number of electrons in sub shells is
a)
2
b)
6
c)
10
d)
14
11.
The number of unpaired electrons in IVA- group element
a)
0
b)
1
c)
2
d)
4
12.
CH3COOK is (Acid, Base, Salt, Acidic salt)
a)
Acid
b)
Base
c)
Salt
d)
Basic salt
13.
By the time of Robert Boyle how many elements were kown?
a)
11
b)
13
c)
16
d)
63
14.
The element which is in First period First group is
a)
Sodium
b)
Chlorine
c)
Lithium
d)
Hydrogen
15.
The color of Red litmus paper in HNO3 is
a)
Blue
b)
Yellow
c)
Pink
d)
No colour change
16.
By now how many elements were discovered in all?
a)
63
b)
91
c)
115
d)
118
17.
The element which is in Second period Eighteenth group is
a)
Helium
b)
Neon
c)
Lithium
d)
Hydrogen
18.
During dispersion Red colour deviates ___ Violet
a)
less than
b)
more than
c)
equal to
d)
No deviation
19.
The color of Phenophthalein in HCl is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
20.
The quantum number which explains about the orientation of the orbital is
a)
Principal quantum number
b)
Angular momentum quantum number
c)
Magnetic quantum number
d)
Spin quantum number
21.
The color of Phenophthalein in H2SO4 is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
22.
When Na2CO3 reacts with HCl then___ , Water and Carbondioxide are formed.
a)
NaCl
b)
Base
c)
Hydrogen
d)
Oxygen
23.
When K2CO3 reacts with HCl then ___ , ___ and water are formed.
a)
KCl, Carbon dioxide
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
24.
The color of Methyle Orange in NH4OH is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
25.
HCl is (Acid, Base, Salt, Acidic salt)
a)
Acid
b)
Base
c)
Salt
d)
Acidic salt
26.
When the object is between F and C(2f) before convex lens the image size is
a)
Equal to object
b)
Bigger than object
c)
Small than Object
d)
Point size
27.
When an active metal Oxide reacts with an acid, a salt and _____ are formed
a)
Water
b)
Hydrogen gas
c)
Oxygen gas
d)
Water and Hydrogen
28.
When metal a hydrogen carbonate reacts with an acid then ___ , ___ and carbon dioxide are formed.
a)
Salt, water
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
29.
When the object is at C(2f) before convex lens the image is formed
a)
at Focus
b)
at Center of curvature(2f)
c)
Between P and F
d)
Between F and C(2f)
30.
During dispersion blue colour deviates ___ red
a)
less than
b)
more than
c)
equal to
d)
No deviation
31.
When Na2CO3 reacts with HCl then NaCl, ____ and Carbondioxide are formed.
a)
Water
b)
Base
c)
Hydrogen
d)
Oxygen
32.
When Zinc metal reacts with HCl, Hydrogen gas and _____ are formed
a)
Water
b)
ZnCl2
c)
Oxygen gas
d)
Water and Hydrogen
33.
The focal length of a 1D lens is
a)
1 cm
b)
10 cm
c)
100 cm
d)
-100 cm
34.
When NaHCO3 reacts with HCl then NaCl, Water and____ are formed.
a)
Carbon dioxide
b)
Base
c)
Hydrogen
d)
Oxygen
35.
If l=1 for an atom then the number of orbitals in its sub shell is
a)
1
b)
2
c)
3
d)
0
36.
Who stated "Anything that cannot be devided further by physical or chemical changes is called element"
a)
Charles
b)
Fermat
c)
Snell
d)
Robert Boyle
37.
What are the values of spin quantum number
a)
+1/2
b)
-1/2
c)
+1/2, -1/2
d)
none of these
38.
In the electromagnetic spectrum, the radiation with large wavelength is
a)
r- rays
b)
X - rays
c)
Ultra Violet rays
d)
Radio Waves
39.
This is a process of refining of metal
a)
Calcination
b)
Roasting
c)
Smelting
d)
Electrolytic refining
40.
In the electro-magnetic spectrum which consists of visible and invisible light, the radiation with large wave length is
a)
r rays
b)
UV rays
c)
IR rays
d)
Radio waves
41.
Which formula is right for a concave mirror
a)
1/f=uv/u+v
b)
f=uv/(u+v)
c)
f=uv/u-v
d)
1/f=1/u-1/v
42.
The distance from real object to a real image is zero then the position of object is
a)
at C
b)
at F
c)
between C and F
d)
beyond C
43.
When Copper metal reacts with an acid, A salt and _____ are formed
a)
Water
b)
Hydrogen gas
c)
Oxygen gas
d)
Water and Hydrogen
44.
The angle of vision for a healthy human being is about
a)
60*
b)
30*
c)
45*
d)
95*
45.
When resistance of our body decreases, the current flow
a)
increases
b)
decreases
c)
reamains same
d)
cannot say
46.
In electrolyting refining pure metal is taken as
a)
Anode
b)
Solution
c)
Cathode
d)
Anode, Cathode
47.
The color of Blue litmus paper in acid is
a)
Red
b)
Yellow
c)
Pink
d)
No colour change
48.
The power of convex lens is
a)
0
b)
>0
c)
<0
d)
Infinity
49.
This is a Chemical change
a)
The process of ripening of mango
b)
Changing water to ice
c)
Cooling of water vapour to water
d)
No answer
50.
When Copper metal reacts with HCl, CuCl2 and _____ are formed
a)
Water
b)
Hydrogen gas
c)
Oxygen gas
d)
Water and Hydrogen
51.
When metal a carbonate reacts with an acid then ___ , ___ and carbon dioxide are formed.
a)
Salt, water
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
52.
Many salts absorb water from atmosphere, this property is caled
a)
Neutralisation
b)
Oxidation
c)
Reduction
d)
Crystallisation
53.
The modern periodic table is proposed based on this charecteristic of an element
a)
Atomic weight
b)
Valency
c)
Symbol
d)
Atomic number
54.
What is the colour of copper sulphate?
a)
Red
b)
White
c)
Blue
d)
Yellow
55.
The maximum value of l for n=5 is
a)
5
b)
3
c)
-5
d)
4
56.
Blueish green colour is due to this copper oxide that reacts with dilute HCl.(Cu(I),Cu(II),Cu(III),Cu(IV))
a)
Copper (II) chloride
b)
Copper (IV) chloride
c)
Copper (III) chloride
d)
Copper (I) chloride
57.
Group IA is called______ family.
a)
Metals
b)
Non-metals
c)
Alkali metals
d)
Noble elements
58.
The process of obtaining pure metal from impure metal is called<br />The process of obtaining pure metal from impure
a)
Purification of metal
b)
Refining of metal
c)
Oxidation of metal
d)
Reduction of metal
59.
When NaHCO3 reacts with HCl then ___ , ___ and water are formed.
a)
NaCl, Carbon dioxide
b)
Base, oxygen
c)
Hydrogen. Caron dioxide
d)
Oxygen, hydrogen
60.
What is the focal length of a lense whose power is 4D
a)
40 cm
b)
40 m
c)
25 cm
d)
25 m
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