Q1. The colour of light is determined by which of the following?
Q2. MRI stands for ?
(a) Magnetic Record of Intestines
(b) Magnetic Resonance Imaging
(c) Magnetic Recording of Investigations
(d) Magnetic Resonance in Intestines
Q3. Petroleum gas is a mixture of ethane, propane and butane. What is its major constituent?
(d) All three are present in equal proportions
Q4. Which of the following is the smallest unit of length?
Q5. In a three pin plug, the longest pin should be connected to which terminal?
(a) neutral terminal
(b) live terminal
(c) ground terminal
(d) any terminal
Q6. Why we cannot hear on the surface of the moon?
(a) its surface absorbs sound
(b) it has very low gravitational force
(c) it has no atmosphere
(d) None of these
Q7. Cinnabar is an ore of—
Q8. Why food cans are coated with tin and not with zinc?
(a) zinc is more reactive than tin
(b) zinc has a higher melting point than tin
(c) zinc is costlier than tin
(d) zinc is less reactive than tin
Q9. When a body is taken from the earth to the moon—
(a) its weight increases
(b) it becomes completely weightless
(c) its weight remains unchanged
(d) its weight decreases
Q10. Human stomach produces acid ‘X’ which helps in digestion of food. What is the name of acid “X”?
(a) acetic acid
(b) hydrochloric acid
(c) methanoic acid
(d) citric acid
Q11. The red colour of the red sea is due to the presence of which of the following?
Q12. The litmus paper utilized in the chemical laboratories is made of which of the following?
Q13. The process of evaporation occurs from which part of plant?
(d) Both (a) and (b)
Q14. Which of the following is a plant hormone?
Q15. Agar-Agar is obtained from which of the following?