A toy car is released from point Q of the ramp and travels towards point P. What is/are the force(s) responsible for pulling the car towards point P?
(A) Weight of the car
(B) Earth’s gravity
(C) Earth’s magnetic field
(D) Frictional force between the wheels and the ramp
A (B) only
B (A) and (B) only
C (B) and (D) only
D (A), (B), (C) and (D)
weight of the car should not be called a force. Gravity is the only force that is pulling the car here. answer should be A
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