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  • Question
  • Which one of the following processes is responsible for the glittering of air bubble rising through water?


  • Options
  • A. Reflection of light
  • B. Refraction of light
  • C. Total internal reflection of light
  • D. Scattering of light

  • Correct Answer
  • Total internal reflection of light 


  • More questions

    • 1. Balloons are filled with

    • Options
    • A. oxygen
    • B. nitrogen
    • C. argon
    • D. helium
    • Discuss
    • 2. Soil erosion on hillslopes can be checked by

    • Options
    • A. Terrace cultivation
    • B. Contour ploughing
    • C. Afforestation
    • D. Strip cropping
    • Discuss
    • 3. Read the passage carefully and choose the best answer to each question out of the four alternatives. My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR. As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate? What aspect of the coat she wanted to hide?

    • Options
    • A. That is was too warm.
    • B. That it was a cheap copy.
    • C. That it was expensive.
    • D. That it was from a luxury market.
    • Discuss
    • 4. Read the passage carefully and choose the best answer to each question out of the four alternatives. My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR. As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate? The author would prefer to be seen wearing all of the following types of clothes, except?

    • Options
    • A. Those with the Christian Dior label.
    • B. Any Japanese brand.
    • C. Clothes stitched by herself.
    • D. Those with the CHRISTIN BIOR label.
    • Discuss
    • 5. Read the passage carefully and choose the best answer to each question out of the four alternatives. My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR. As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate? Why is her boss angry?

    • Options
    • A. Because he has started suffering from fits.
    • B. Because it is a bad day.
    • C. Because she was late the day before.
    • D. Because employees are coming late to work.
    • Discuss
    • 6. Read the passage carefully and choose the best answer to each question out of the four alternatives. My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR. As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate? What has been the problem with London trains lately?

    • Options
    • A. The trains have become awful.
    • B. There are more trains during rush hour.
    • C. People are late to work because of train delays.
    • D. Trains are cancelled without prior intimation.
    • Discuss
    • 7. Yoga city in India?

    • Options
    • A. Varanasi
    • B. Allahabad
    • C. Rishikesh
    • D. Amritsar
    • Discuss
    • 8. What is laughing gas?

    • Options
    • A. Nitrous Oxide
    • B. Carbon monoxide
    • C. Sulphur dioxide
    • D. Hydrogen peroxide
    • Discuss
    • 9. Read the passage carefully and choose the best answer to each question out of the four alternatives. My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR. As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate? Which of the following situations creates a 'bad day' for the author?

    • Options
    • A. Being caught wearing a cheap brand coat.
    • B. Cancelled trains during London rush hour.
    • C. When other employees are on time but she is late.
    • D. Having to spend money on expensive clothes.
    • Discuss
    • 10. In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'. My best wishes (1)/ are always (2)/ with you. (3)/ No error (4)

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss


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