GOV EXAM ADDA

5. Diamond is harder than graphite because of

A. Tetrahedral structure of diamond

B. Difference of crystalline structure

C. Difference of layer of atom

D. None of these

Answer & Solution

6. Who discovered Nitrogen?

Answer & Solution

7. Why metals conduct electricity?

A. Because of free electrons

B. Because of high atomic density

C. Because of low melting point

D. Because if high tensile strength

Answer & Solution

8. Quartz is a type of

A. Magnesium Carbonate

B. Aluminium oxide

C. Silicon dioxide

D. Sodium silicate

Answer & Solution

9. One carat of diamond is equal to

Answer & Solution

10. Which among the following elements is a liquid at room temperature?

Answer & Solution

11. Which of the following gases is present in the atmosphere can be detected by its odour?

Answer & Solution

12. Which one of the following is used in Pencils?

Answer & Solution

13. Which of the following property is generally found in non-metal?

Answer & Solution

14. Which among the following is white Phosphorus?

Answer & Solution

15. If water smells bad, then that odour can be removed by adding

Answer & Solution

16. In Graphite layers are held together by

Answer & Solution

17. Fire fighting clothes are made from

Answer & Solution

18. Alkali metals can

A. Easily gain electrons

B. Easily lose electrons

C. Be highly unstable at room temperature

D. Vporize at room temperature

Answer & Solution

19. Which of these is not a macronutrient for Plants?

Answer & Solution

20. Why metals conduct electricity?

A. Because of free electrons

B. Because of high atomic density

C. Because of low melting point

D. Because if high tensile strength

Answer & Solution

21. Which of the metals has the maximum thermal conductivity?

Answer & Solution

22. Which one of the following forms of phosphorous is most reactive?

A. Voile Phosphorous

B. Red phosphorous

C. Black Phosphorous

D. White Phosphorous

Answer & Solution

23. Magnesium is a constituent metal of ___.

Answer & Solution

24. Name the gas used in preparation of bleaching power

Answer & Solution

25. Phosphorous is kept in water because

A. It critical temperature is high

B. It critical temperature is low

C. It ignition temperature is very high

D. It ignition temperature is very low

Answer & Solution

1. Which one among the following is Lubricant?

2. Fullerene is a newly discovered crystalline carbon allotrope, contains

3. Which among the following has the maximum density?

4. Which one of the following metals cannot be used as an electromagnet?

5. Diamond is harder than graphite because of

6. Who discovered Nitrogen?

7. Why metals conduct electricity?

8. Quartz is a type of

9. One carat of diamond is equal to

10. Which among the following elements is a liquid at room temperature?

11. Which of the following gases is present in the atmosphere can be detected by its odour?

12. Which one of the following is used in Pencils?

13. Which of the following property is generally found in non-metal?

14. Which among the following is white Phosphorus?

15. If water smells bad, then that odour can be removed by adding

16. In Graphite layers are held together by

17. Fire fighting clothes are made from

18. Alkali metals can

19. Which of these is not a macronutrient for Plants?

20. Why metals conduct electricity?

21. Which of the metals has the maximum thermal conductivity?

22. Which one of the following forms of phosphorous is most reactive?

23. Magnesium is a constituent metal of ___.

24. Name the gas used in preparation of bleaching power

25. Phosphorous is kept in water because