Which of the following statements is INCORRECT?
ADown feathers of birds keep them warm
BWading birds have long legs with spread-out toes that help them to walk in water
CPerching birds have two toes in the front and two toes at the back
DFlesh-eating birds such as eagle, vulture and hawk have strong, sharp and hooked beaks
An animal 'X' is found in areas covered with ice and snow. It has thick layer of fat beneath the skin. It
lives in groups to protect itself from cold.
Unscramble the given words and identify the animal 'X'.
Outer shell configurations of five atoms (P - T) are given as:
Which of the following statements is/are incorrect about these atoms?
I. Elements S and T have same valency.
II. Elements Q and T will form a compound of formula Q2T3.
III. Proton number of T is 12.
IV. R can form a cation as well as an anion.
AII and III only
CIII and IV only
DI, II and IV
Unscramble the letters given in column II to make meaningful terms and match column I with column II to select the correct option.
|Column I||Column II|
of the volcano
of dry weather
from a volcano
AP - (i); Q - (iii); R - (ii); S - (iv)
BP - (iv); Q - (ii); R - (i); S - (iii)
CP - (i); Q - (iii); R - (iv); S - (ii)
DP - (iii); Q - (i); R - (ii); S - (iv)
A chain of length L is placed on a horizontal surface shown in the figure. At any instant, x is the length of chain on rough surface and the remaining portion lies on smooth surface. Initially x = 0. A horizontal force P is applied to the chain as shown in the figure. In a given time interval, x changes from x = 0 to x = L. For chain to move with constant speed,
AThe magnitude of P should increase with time
BThe magnitude of P should decrease with time
CThe magnitude of P should increase first and then decrease with time
DThe magnitude of P should decrease first and then increase with time.
Which of the following graphs shows the best suitable plot for the length of the lamp-post's shadow from 9 am to 2 pm?
A car travels from one place to another in 2 hours.
Its speed-time graph during this motion is shown in
figure. The maximum acceleration during this journey
A 140 km/h2
B 160 km/h2
C 100 km/h2
D 120 km/h2