Question

Q.1. Select the correct answer from the choices A, B, C, D which are given. Write only the
letter corresponding to the correct answer.
Which of the following is a chemical reaction ?
A Freezing Liquid Mercury
B. Dropping a sliced orange into a vat of Sodium Hydroxide
C Addding yellow to blue to make green D. Cutting a piece of paper into two pieces
(11) Which of the following is a physical reaction ?
A. Shattering Glass with a baseball B. Fireworks Exploding
C Corroding metal
D. Lighting a match
(til) Which of the following is a chemical reaction ?
A Painting a wall blue
B. Ice-cream melting
C. A bicycle rusting
D. Scratching a key on a class desk
(iv) Which of the following is a physical reaction ?
A Frying egg
B. A Macbook falling out of a window
C Digesting carrots
D. Creating ATP in the human body
(v) Which of the following is a chemical change ?
A Burning Leaves
B. Crushing of Pencil
C. Cutting Diamonds
D. None of the above
(vi) Which of the following would not be a physical change ?
A Freezing water to make ice cubes B. melting gold to make jewellery
C. burning gasoline in a lawnmower D. boiling water for soup
(vii) Which of the following is NOT a physical change?
A grating cheese
B. fermenting of cheese
C. melting cheese
D. mixing two cheeses in a bowl
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(vill) Which of the following is an example of physical change ?
A Mixing baking soda and vinegar together, and this causes bubbles and foam.
B. A glass cup falls from the counter and shatters on the ground
C Lighting a piece of paper on the fire and the paper burns up and leaves ashes
D. Baking a birthday cake for your mother.
(w) Which of the following is an example of chemical change ?
A Filling up a balloon with hot air
B. Taking a glass of water and freezing it by placing it in the freezer
C A plant collecting sunlight and tuming it into food
D. Your dog ripping up your homework
(x) Which change can be casily be reversed?
A Chemical Change
B. Both a physical and chemical change
C. Physical Change
D. Neither a physical or chemical chango
(xi) When a new substance is formed with different properties than the original substance it is
called a
A Chemical change
B. Physical change
C Freezing
D. Boiling
(xii) If the chemical properties of a substance remain unchanged and the appearance or shape of a
substance changes it is called a
A Chemical change
B. Both a physical and chemical change
C Physical change
D. Neither a physical or chemical change
(xili) Which is an example of a physical change?
A Metal rusting
B. Silver tarnishing
C Water boiling
D. paper buming
(xiv) What characteristic best describes what happens during a physical change?
A Composition changes
B. Form stays the same
C. composition stays the same
D.Mass is lost​

Answer 1

1 think my answers are right or wrong please check it

Answer 2

Answer:

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