Discussion
Home ‣ General Knowledge ‣ Chemistry Comments
- Question
The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have
Options- A. 10 protons and 7 electrons
- B. 7 protons and 10 electrons
- C. 4 protons and 7 electrons
- D. 4 protons and 10 electrons
- Correct Answer
- 7 protons and 10 electrons
- 1. In known elements, the maximum number is of
Options- A. Metals
- B. Non Metals
- C. Metalloids
- D. None of these Discuss
- 2. What is the element present in urea
Options- A. C,H,O
- B. C,N,O
- C. C,N,H
- D. C,O,N,H Discuss
- 3. The metal which reacts most violently with with cold water is
Options- A. calcium
- B. sodium
- C. magnesium
- D. potassium Discuss
- 4. What is the third most common gas found in the air we breathe ?
Options- A. Argon
- B. Neon
- C. Carbondioxide
- D. Hydrogen Discuss
- 5. How many moles are there in 140g of Si (atomic mass of silicon is 28)
Options- A. 5
- B. 10
- C. 28
- D. 140 Discuss
- 6. Electromagnetic radiation with maximum wavelength is
Options- A. ultraviolet
- B. radio waves
- C. x-rays
- D. infrared Discuss
- 7. Boron cannot form which one of the following anions? (1) BO2- (2) BF63- (3) BH4- (4) B(OH)4-
Options- A. Option 1
- B. Option 2
- C. Option 3
- D. Option 4 Discuss
- 8. The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27°C is to a volume of 100 dm3
Options- A. 42.3 J/ mole / K
- B. 38.3 J/ mole / K
- C. 35.8 J/ mole / K
- D. 32.3 J/ mole / K Discuss
- 9. The bleeding of a wound is stopped by the application of ferric chloride because_____
Options- A. Ferric chloride seals the blood vessels
- B. Blood starts flowing in the opposite direction
- C. Blood reacts and a solid is formed which seals the blood vessels
- D. Blood is coagulated and the blood vessels are sealed Discuss
- 10. Which gas is known as "Fuel of Future" ?
Options- A. Methane
- B. Oxygen
- C. Neon
- D. Hydrogen Discuss
Chemistry problems
Search Results
Correct Answer: Metals
Correct Answer: C,O,N,H
Correct Answer: potassium
Explanation:
Potassium reacts violently with water liberating hydrogen. The reaction is so violent that the liberated hydrogen catches fire.
Correct Answer: Argon
Explanation:
The most common gas people breathe from clean air is nitrogen. Air is a mixture of gases, and the air on Earth contains about 78 percent nitrogen and about 21 percent oxygen. Argon, carbon dioxide neon, helium, methane, krypton, hydrogen and xenon are in much smaller amounts.
Correct Answer: 5
Correct Answer: radio waves
Correct Answer: Option 2
Explanation:
Due to absence of low lying vacant d orbital in B, hybridization is not possible hence will not formed.
Correct Answer: 38.3 J/ mole / K
Explanation:
= =
Correct Answer: Blood is coagulated and the blood vessels are sealed
Correct Answer: Hydrogen
Explanation:
Because of its being pollution free and combustion efficient, Hydrogen gas is called fuel of future. Because of its origin in marshy places, Methane is called as 'Marsh Gas'.
Comments
There are no comments.More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.