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WorksheetsRAMAN'S CLASS XI SCIENCE QUIZ CONTEST
Total questions: 28
Worksheet time: 6mins
The property of halogens which is not correctly matched is
F > Cl > Br > I (Ionisation energy)
F > Cl > Br > I (Electronegativity)
I > Br Cl > F (Density)
F > Cl > Br > I (Electron affinity)
What makes a valence electron more attracted to the nucleus?
Adding more energy levels makes the further from the nucleus
There are more valence electrons in the outer shell
There are more protons in the nucleus
There are less protons in the nucleus
How many moles are in 3.01 x 1022 atoms of magnesium?
0.0500 moles
1.81 x 1046 moles
5.00 x 1021 moles
5.00 moles
Which of these is not a sign of chemical change?
Bubbles
Color change
melting
Bad smell
______________________ determines an atom's reactivity or chemical properties.
electron
neutron
proton
valence electron
This element is the only element on the left side of the periodic table that is a nonmetal.
Hydrogen
Nitrogen
Bromine
Chlorine
Factors affecting the ionisation enery
Atomic radius
Effective nuclear charge
Shielding effect
All of the above
Number of
chromosomes in new born baby is
46
47
48
49
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when
Semilunar valves close down after the blood flows into vessels from ventricles
AV valves open up
Ventricular walls vibrate due to gushing in of blood from atria
AV node receives signal from SA node
Person with blood group AB is considered a universal recipient because he has
both A and B antigens in the plasma but no antibodies
both A and B antibodies in the plasma
no antigen on RBC and no antibody in the plasma
both A and B antigens on RBC but no antibodies in the plasma
A __________is obtained when percentage saturation of Hb with O2 is plotted against the pO2.
J shaped curve
Sigmoid Curve
Exponential curve
None of these
In water, frogs respire through
Skin
lungs
buccal cavity
All of these
The oral cavity initiates all the following except:
Chemical process of digestion
Mechanical process of digestion
Deglutition
Peristalsis
Of the processes which occurs in leaves, the one which may lower their temperature is
respiration
photosynthesis
transpiration
hydrolysis
Basis of stomatal opening is
decrease in cell sap concentration
shrinkage of guard cells
endosmosis
exosmosis
9. Which of the following is made of dead cells?
Collenchy
Phloem
Phellem
Xylem parenchyma
This is the functional unit of the kidney
Heilum
Neurons
Nephrons
Medulla
Shipra went from her home to school 2.5 km away. On finding her school closed she returned immediately. What is her displacement and the total distance travelled by her
0km, 5km
5km, 0km
0m, 5km
5m,0 km
What exactly is a conservative force conserving?
Force
Energy
Velocity
Acceleration
The force that is not one of the conservative forces is
frictional force
gravitational force
electric force
elastic spring force
A field in which the work is done in a moving body along a closed path is zero is called
Electric field
Conservative field
Electromagnetic field
None of the above
When a force is parallel to the direction of motion of the body, then work done on the body is
zero
minimum
infinity
maximum
. Which of the following types of force can do no work on the particle on which it acts?
Frictional force
Gravitational force
Elastic force
Centripetal force
equilibrium, the net moment acting on the body by various conservative forces is _____:
One
Two
Three
Zero
conservative frictional force always acts ____________ to the surface of the application of the friction.
Tangential
Perpendicular
Parallel
Normal
What does Newton’s third law states for the conservative forces
The rate of change of momentum is equal to the force applied
For every reaction, there is an opposite reaction
The body tends to be rotated if the force is applied tangentially
The body is rest until a force is applied
If any external conservative force also is applied on the distributed loading then
The net force will act at the centroid of the structure only
The net load will not be formed as all the forces will be canceled
The net force will act on the base of the loading horizontally
The net force will not be considered, there would be a net force of the distribution, rest will be the external forces
. A conservative force is dependent only on :
a. Position of the objects
b. Position of the forces
c. Position of the path taken
d. None of the above
Position of the objects
Position of the forces
Position of the path taken
None of the above
