Electrolysis of a solution of sodium chloride produces
A Hydrogen gas at anode and chlorine at cathode
B Hydrogen gas at cathode, chlorine at anode and sodium hydroxide
C Hydrogen gas at anode and sodium hydroxide at cathode
D Chlorine gas at anode and sodium hydroxide at cathode.
When a hand blender is switched on, ________________ energy changes to ___________ and ___________ energy.
A Mechanical, Sound, Heat
B Sound, Heat, Mechanical
C Electrical, Heat, Potential
D Electrical, Kinetic, Sound
A hand blender runs on electricity. When it is switched on, its blades rotate and a sound is also produced as the motor starts. Thus, electrical energy changes into kinetic energy and sound energy.
Study the given Venn diagram.
Identify points 1, 2 and 3.
|A||Melting of ice||Boiling of rice||Burning of a candle|
|B||Burning of paper||Rusting of iron||Cutting of fruits|
|C||Breaking of a glass||Baking a cake||Burning of LPG in kitchen|
|D||Tearing of paper||Evaporation of water||Making lemonade|
What is the characteristic of the plant whose product is shown below?
A The plant is small with woody stem.
B The plant is small with soft stem.
C The plant has weak stem and it grows along the ground.
D The plant has weak stem and needs support to grow upright.
Read the following statements.
(i) I am present in air.
(ii) I leave your lungs when you breathe out.
(iii) Plants needs me to prepare food.
Which of the following gases is being described by the above statements?
how it can be Hydrogen
Which of the following statements is true regarding weeds?
AWeeds are useful for the plants.
BWeeds are always grown intentionally.
CWeeds should not be removed.
DNone of these
The student is studying soil erosion. The top soil collected is maximum, so it is easily eroded. Answer- A. Top soil is easily eroded.
Three uniform planks, P, Q and R are balanced on pivots. Two equal forces, each of value F, act on each plank but in different manners as shown in the figure.Which of the following options is correct regarding this?
APlank P will either bend or break.
BPlank Q will show no movement at all.
CPlank R will be pulled up the pivot.
DPlank P will show no movement at all.
if equal is being applied on Q....on the left lower and right upper end.... wont it balance out and not make Q move? How is option B correct?