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We should always avoid _________.

AWashing hands before and after eating food
BBrushing teeth twice a day
CFighting with friends while playing
DHelping mother in kitchen

Refer to the given word grid and select the option that can be found in it.


ATerm used for water that is fit to drink
BThe solid form of water
CName for gently moving wind
DMineral used to make watches

A word arrangement machine when given an input of words, rearranges them into a particular way as given below.
Input : happiness comes from your own actions
Step I : your happiness comes from own actions
Step II : your own happiness comes from actions
Step III : your own happiness from comes actions And Step III is the last step for the above input.
As per the rule followed in above steps, which is the last step for the given below input?
Input : "slow and steady wins the race"

AStep I
BStep II
CStep III
DStep IV

Rahul, a science teacher performed the following experiment to study the reaction between dilute sodium hydroxide and dilute sulphuric acid.

Select the correct statement(s) about the given experiment.
I. On mixing these substances, three new products will be formed, including water.
II. The chemical reaction involved is known as neutralisation reaction and is exothermic in nature.
III. The salt formed in this reaction is acidic in nature.

AII only
BII and III only
CIII only
DI and III only

Match column I with column II and select the correct option from the given codes.


A(i)–S; (ii)–Q; (iii)–R; (iv)–P
B(i)–R; (ii)–Q; (iii)–P; (iv)–S
C(i)–Q; (ii)–P; (iii)–R; (iv)–S
D(i)–R; (ii)–S; (iii)–Q; (iv)–P

A rubber ball of mass 100 g falls from a height of 4.90 m and after hitting the ground it rebounds to a height of 2.45 m. The impulse imparted to the ball by the ground if the time for which they are in contact was 0.2 s is

A1.67 N s
B2.38 N s
C3.34 N s
D0.84 N s

Seeds which have wings or tufts of hair on them are generally dispersed by ____.

AExplosion
BAir
CWater
DAnimals

Three identical blocks each of mass m, are pushed by a force F on a frictionless table as shown in figure.


A Net force on X is F.
B Force applied by X on Y is F/3.
C Force applied by Y on Z is equal to net force on X.
D Net force on Y is equal to zero.

Find the number of triangles formed in the given figure.


A11
B15
C18
DNone of these