Q1. An image formed by a plane mirror could not be obtained on a screen. Such an image is called a/an________
A. Real image
B. Inverted image
C. Virtual image
D. Perfect image
Q2. Mirrors are used by dentists to see an enlarged image of teeth. These mirrors are _______.
Q3. What is the correct sequence of the passage of the food inside the human body?
A. Buccal cavity, oesophagus, stomach, large intestine, small intestine, rectum, anus
B. Buccal cavity, oesophagus, stomach, small intestine, large intestine, rectum, anus
C. Oesophagus, buccal cavity, stomach, small intestine, large intestine, rectum, anus
D. Buccal cavity, oesophagus, small intestine, stomach, large intestine, rectum, anus
Q4. The synthesis of food in plants takes place in the_________.
Q5. Vermi‐processing toilet involves the use of________.
A. Aerobic bacteria
D. Anaerobic bacteria
Q6. A simple pendulum consists of a small metallic ball. This ball is called_____.
Q7. Identify the natural indicator.
A. Methyl orange
C. China rose
D. Methyl blue
Q8. When an iron nail is put in copper sulphate solution, the colour of the solution turns green. This is because_________.
A. Iron sulphate is formed
B. Copper is deposited
C. Impurities are present in iron
D. Iron is formed
Q9. If the pH of a soil sample is 4, which of the following substance can be added to help the growth of plants?
A. Calcium chloride
B. Calcium oxide
D. Organic matter
Q10. The finger like projections called villi, present in the small intestine, help in the process of ________.
Q11. Pick the INCORRECT statement.
A. Warm air is lighter than cold air.
B. Air expands on heating.
C. Smoke always rises up.
D. When warm air rises up, pressure in that region increases.
Q12. The ISI mark on an electrical appliance ensures that the _______.
A. Appliance is safe
B. Appliance is new
C. Appliance is safe and wastage of energy is minimum
D. Wastage of energy is minimum