Which isotope is used in the nuclear power plants to generate electricity?
Anonymous Quiz
44%
Uranium 235
24%
Iodine 131
15%
Cobalt21
18%
Uranium 238
What was the source of alpha particles in Rutherford scattering experiment?
Anonymous Quiz
33%
Hydrogen nucleus
27%
Argon nucleus
33%
Helium neculeus
8%
None
❤1
Which of the following elements does not exhibit the electrovalencey?
Anonymous Quiz
21%
Sodium
30%
Calcium
37%
Carbon
12%
Chlorine
Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17?
Anonymous Quiz
30%
Chlorine
33%
Sulphur
30%
Both are reactive
7%
Can't say
What property of an element determines its chemical behaviour?
Anonymous Quiz
21%
Size of element
50%
Valency of element
22%
Molar mass of element
7%
None
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:
Anonymous Quiz
26%
2m/s
39%
-2m/s
22%
0.5m/s
12%
-0.5m/s
car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:
Anonymous Quiz
17%
40m/s
49%
25m/s
27%
10m/s
7%
5m/s
In a free fall the velocity of a stone is increasing equally ion equal intervals of time under the effect of gravitational force of the earth. Then what can you say about the motion of this stone? Whether the stone is having:
Anonymous Quiz
29%
Uniform velocity
49%
Uniform acceleration
13%
Retradation
9%
Constant proportion
. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
Anonymous Quiz
11%
Krypton
55%
Kerosene
21%
Carbon
13%
Oxygen
Which of the following cannot be considered a form of matter?
Anonymous Quiz
14%
Atom
21%
Water
54%
Humidity
11%
Electron
Forwarded from Shubham Jha - Class 7 & 8
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The proteins and lipids, essential for building the cell membrane, are manufactured by:
Anonymous Quiz
48%
Endoplasmic recticulum
28%
Golgi apperatus
18%
Mitochondria
7%
Lysosome
Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?
Anonymous Quiz
42%
Latent heat
31%
Lattic energy
21%
Loss of heat
5%
None
A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:
Anonymous Quiz
26%
400
47%
250
22%
10
5%
0
An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be:
Anonymous Quiz
31%
Xy
31%
Xy3
33%
Xy2
5%
Xyè