Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
Science and Technology
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 5 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
| Average score | |
| Your score |
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- Answered
- Review
- Question 1 of 5
1. Question
1 pointsThe Surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason
Correct• Density of water is maximum at 4-degree Celsius. So, the ice forms in cold weather form at the top of the water and then act as an insulating barrier preventing the water underneath from getting much colder as heat can’t escape.
Incorrect• Density of water is maximum at 4-degree Celsius. So, the ice forms in cold weather form at the top of the water and then act as an insulating barrier preventing the water underneath from getting much colder as heat can’t escape.
- Question 2 of 5
2. Question
1 pointsAn artificial satellite orbiting around the earth dues not fall down. This is so because the attraction of Earth.
Correct• An artificial satellite moving around the Earth in a circular orbit possesses an acceleration which is constant in magnitude but “Changing in direction”. An artificial satellite revolves round the earth under “Centripetal acceleration”. Satellite is launched at speed of 30,000 km/hr. Which is source of the centrifugal force and the attraction of earth holds it from moving away from this centrifugal force.
Incorrect• An artificial satellite moving around the Earth in a circular orbit possesses an acceleration which is constant in magnitude but “Changing in direction”. An artificial satellite revolves round the earth under “Centripetal acceleration”. Satellite is launched at speed of 30,000 km/hr. Which is source of the centrifugal force and the attraction of earth holds it from moving away from this centrifugal force.
- Question 3 of 5
3. Question
1 pointsWhich of the following element is essential for the construction of nuclear reactors?
Correct• Zirconium purified metal is primarily used by the nuclear industry to form the outer layer of fuel rods in nuclear reactors.
Incorrect• Zirconium purified metal is primarily used by the nuclear industry to form the outer layer of fuel rods in nuclear reactors.
- Question 4 of 5
4. Question
1 pointsAcid rain is caused by the pollution of environment by
Correct• Acid rain is caused by a chemical reaction that begins when compounds of sulphur dioxide and nitrogen oxide react with molecules in the atmosphere to produce acids.
Incorrect• Acid rain is caused by a chemical reaction that begins when compounds of sulphur dioxide and nitrogen oxide react with molecules in the atmosphere to produce acids.
- Question 5 of 5
5. Question
1 pointsWhich of the following organisms can serve as a biofertilizer for rice crop?
Correct• Blue-green algae is used as a biofertilizer in rice crop. Blue green has a nitrogen fixing ability which enhances the production of rice.
Incorrect• Blue-green algae is used as a biofertilizer in rice crop. Blue green has a nitrogen fixing ability which enhances the production of rice.