Questions
Which thermometric liquid is used in a laboratory thermometer?
Write the full form of WBC.
The acceleration due to gravity of three heavenly bodies are given in the table alongside.
| Heavenly bodies | Acceleration due to gravity |
| A | 9.8 m/s$^2$ |
| B | 25 m/s$^2$ |
| C | 1.67 m/s$^2$ |
- Calculate the velocity of object falling freely towards the surface of B in 5th second.
- If a man can lift 50 kg mass on the surface of the earth, how much mass can he lift on the surface of C?
- Why are there big craters on the surface of heavenly body of C?
- Although the mass of Jupiter is 319 times of the mass of the earth, but its acceleration due to gravity does not increase in the same ratio, why?
Different types of cell division are shown in the diagram:
- Which of them can form gametes?
- Which of them forms daughter cells having identical characteristics of mother cell?
- Write an importance of figure A.
- Which of them helps to make number of chromosome similar to mother cell in sexual reproduction?
An electric material production company saw the demand of transformer in the market.
- If the company manufactures transformers with number of primary coil 200 turns and secondary coil 100 turns. What type of transformer is formed?
- If 50V DC is passed in the primary coil in the transformer manufactured by the company, what will be the secondary voltage?
- What is the relation between input and output energy in the transformers?
- What is the use of transformer given in no. '1', in our daily life?
Study the given figure of blood:
- Which type of them covers 55% part of blood?
- Which of them is concerned with leukemia?
- What is the abnormality called, when number of A decreases below normal level?
- Which of them forms fibre like structure during its function?
Student sitting in the last bench cannot read the letters on a blackboard clearly but can read the text book. Write the type of defect of vision, he suffering with its two causes and sketch suitable ray diagram showing its remedy.
Explain the transmission of digital signal and its application.
What are the positive aspects of the modern periodic table relative to Mendeleev's periodic table? Mention any four points.
A homologous series of alcohol is given in the table. In serial no. 2, 'X' is written instead of real compound.
| SN | Homologous Series |
| 1 | CH$\rm _3$OH |
| 2 | X |
| 3 | CH$\rm _3$CH$\rm _2$CH$\rm _2$OH |
- Write the molecular formula of X.
- Write the structural formula of the compound formed by the removal of one H and one -OH from the compound kept at X.