Aashi grouped plants on the basis of their seed dispersal
mode. By mistake, she put one wrong plant in each
group. Identify the odd member out and select the
correct option regarding this.
Group I : Maple, Lotus, Dandelion
Group II : Blackberry, Litchi, Coconut
Group III : Cocklebur, Geranium, Pea
A Lotus is incorrectly placed in group I and should be replaced with Euphorbia.
B Litchi in group II should be interchanged with Geranium in group III.
C Blackberry is incorrectly placed in group II and should be replaced with cotton.
D Cocklebur is incorrectly placed in group III and should be replaced with Lupin.
Lupin is dispersed by wind so how can it be D
Mount Rushmore, a tribute to great American presidents is made up of which kind of rock?
Read the given statements and select the correct option.
Statement 1 : Sound would travel faster on a hot summer day than on a cold winter day.
Statement 2 : Velocity of sound depends on temperature.
A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.
Sound travels slow in high temperatures .
Read the following passage and select the option which correctly fill blanks (i), (ii), (iii) and (iv).
(i) is the point of origin of an earthquake. (ii) measures the strength of an earthquake by estimating the amount of energy released at the focus. The point vertically above the origin point on the surface of the Earth, is (iii) . Seismic waves are detected, recorded and measured by (iv) .
Itâs seismograph that measures the strength of the earthquake.
Rohan wanted to test the strength of four magnets.
He used each magnet to attract a paperclip from a
distance. For each magnet, he increased the distance
between the magnet and the paperclip until the magnet
could no longer attract the paperclip. He then recorded
his findings in a table.
Arrange the magnets from the strongest to the weakest.
A(i), (iii), (ii), (iv)
B(iii), (i), (ii), (iv)
C(ii), (iv), (i), (iii)
D(iv), (ii), (i), (iii)
Which of the following statements are incorrect?
(i) Every periodic motion is an oscillatory motion.
(ii) Motion of strings of a guitar shows oscillatory as well as vibratory motion.
(iii) In circular motion, the acceleration of the particle is zero.
(iv) Inertia is the property of a body by virtue of which it resists any change in its state of rest or of motion.
(v) Aluminium foils can never be used as connecting wires whatever the circuit is.
A (ii), (iii) and (v) only
B (i), (ii) and (iii) only
C (ii) and (iv) only
D (i), (iii) and (v) only
Ans 1: (Master Answer)
A periodic motion may or may not be oscillatory .For example , motion of earth about sun is periodic but not oscillatory.
During circular motion of an object , its direction of motion changes with time and hence the velocity.So,the acceleration of the object is non zero.
Aluminium is a good conductor of electricity .Hence, statement v is wrong.