GOV EXAM ADDA

4. 9) In the manufacture of steel by open hearth process cast iron used has no phosphorus but has manganese as an impurity. The furnace should have lining of

Answer & Solution

5. Brass is a mixture of

A. Copper and Tin

B. Copper, Aluminium and Mg

C. Copper and Zinc

D. Copper, Aluminium and Zinc

Answer & Solution

6. The purest from of iron is

Answer & Solution

7. Solder used for joining metal parts together is an alloy of

Answer & Solution

8. An alloy contains 20% zinc, 45% nickel and rest aluminium. The total mass in gm of the alloy containing 105gm of aluminium is

Answer & Solution

9. Bronze is an alloy of

Answer & Solution

10. Brass is an alloy

A. Copper and Tin

B. Copper and Zinc

C. Iron and Copper

D. Copper and Aluminium

Answer & Solution

11. Hydrogen sulphide is a

A. Reddish brown gas with fishy odour

B. Colourless gas with rotten egg smell

C. Colourless, odourless gas

D. Yellowish gas with pungent odour

Answer & Solution

12. Which of the following will displace Hydrogen from acids to form salts?

Answer & Solution

13. which of the following is used in welding broken pieces of iron rails and parts of machine

Answer & Solution

14. Green colour seen in firework display, is due to the chloride salt of

Answer & Solution

15. Caustic Soda is

Answer & Solution

16. Most abundant inter gas in the atmosphere is

Answer & Solution

17. Main constituent of liquid bleach is

A. Sodium hypochlorate

B. Sodium hypochlorite

C. Hydrochloric Acid

D. Sodium Chloride

Answer & Solution

18. Liquid Chemical used for artificial rain or cloud seeding

A. sodium Chloride (NaCl)

B. Dry ice (Solid CO2)

C. Silver iodide(AgI)

D. All of these

Answer & Solution

19. Identify the metal which is non-toxic in nature

Answer & Solution

20. Tip of match stick contains

A. White phosphorous

B. Phosphorous trichloride

C. Red Phosphorous

D. Phosphorous penta oxide

Answer & Solution

21. The common name of Magnesium Sulphate heptahydrate is

Answer & Solution

22. which of the following elements has the lowest melting point ?

Answer & Solution

23. The Chemical formula of Ammonia is ____

Answer & Solution

24. Who discovered Fullerene (an allotrope of carbon)?

Answer & Solution

25. Which of the following is not a Halon gas?

Answer & Solution

1. Whose presence in drinking water is welcome?

2. A substance used in metallurgy to remove rock material is called

3. The most malleable metal is

4. 9) In the manufacture of steel by open hearth process cast iron used has no phosphorus but has manganese as an impurity. The furnace should have lining of

5. Brass is a mixture of

6. The purest from of iron is

7. Solder used for joining metal parts together is an alloy of

8. An alloy contains 20% zinc, 45% nickel and rest aluminium. The total mass in gm of the alloy containing 105gm of aluminium is

9. Bronze is an alloy of

10. Brass is an alloy

11. Hydrogen sulphide is a

12. Which of the following will displace Hydrogen from acids to form salts?

13. which of the following is used in welding broken pieces of iron rails and parts of machine

14. Green colour seen in firework display, is due to the chloride salt of

15. Caustic Soda is

16. Most abundant inter gas in the atmosphere is

17. Main constituent of liquid bleach is

18. Liquid Chemical used for artificial rain or cloud seeding

19. Identify the metal which is non-toxic in nature

20. Tip of match stick contains

21. The common name of Magnesium Sulphate heptahydrate is

22. which of the following elements has the lowest melting point ?

23. The Chemical formula of Ammonia is ____

24. Who discovered Fullerene (an allotrope of carbon)?

25. Which of the following is not a Halon gas?