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- Question
The law of constant proportions was enunciated by
Options- A. Dalton
- B. Berthelot
- C. Avogadro
- D. Proust
- Correct Answer
- Proust
- 1. Coagulation during water treatment is designed to remove
Options- A. Sand and gravel
- B. Bad smells
- C. Pathogenic microorganisms
- D. Particles suspended in water Discuss
- 2. Which one of the following can be oxidised to the corresponding carbonyl compound:
Options- A. 2-methyl-2-hydroxy propane
- B. 2-hydroxy propane
- C. o-Nitrophenol
- D. Phenol Discuss
- 3. Leakage of which of the following gases caused the Bhopal gas tragedy ?
Options- A. Carbon monoxide
- B. Methyl isocyanate
- C. Nitrous oxide
- D. Hydrogen sulphide Discuss
- 4. Which of the following does not contain the material particles
Options- A. alpha - rays
- B. beta - rays
- C. gamma - rays
- D. anode rays Discuss
- 5. The fundamental particles present in equal numbers in neutral atoms are
Options- A. protons and electrons
- B. neutrons and electrons
- C. protons and neutrons
- D. protons and positrons Discuss
- 6. Of the following elements, which one has the same oxidation state in all of its compounds?
Options- A. Hydrogen
- B. Fluroine
- C. Carbon
- D. oxygen Discuss
- 7. TEL minimise the knocking effect when mixed with petrol, it acts as_______
Options- A. Positive catalyst
- B. Negative catalyst
- C. Auto catalyst
- D. Induced catalyst Discuss
- 8. Mg+O2=MgO Balance the above Chemical equation?
Options- A. 2Mg + O2 ----> 2MgO
- B. 2Mg + O ----> 2MgO
- C. 2Mg + O ----> MgO2
- D. 2Mg + O2 ----> MgO2 Discuss
- 9. In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is 1) A2B5 2) A3B2 3) A2B3 4) A3B4
Options- A. Option 1
- B. Option 2
- C. Option 3
- D. Option 4 Discuss
- 10. A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :
Options- A. 518 nm
- B. 1035 nm
- C. 325 nm
- D. 743 nm Discuss
Chemistry problems
Search Results
Correct Answer: Particles suspended in water
Explanation:
Coagulation is a chemical process that involves neutralization of charge. Coagulation during water treatment is designed to remove particles suspended in water.
Correct Answer: 2-hydroxy propane
Correct Answer: Methyl isocyanate
Correct Answer: gamma - rays
Correct Answer: protons and electrons
Correct Answer: Fluroine
Correct Answer: Negative catalyst
Correct Answer: 2Mg + O2 ----> 2MgO
Explanation:
Given Equation is
Balancing the Chemical Equation is nothing but Conservation of Matter. As Matter is Neither created nor Destroyed, it must be conserved.
Here we have 1 Mg and 2 O on the left side and 1 Mg and 1 O on the right side
To balance that, add 1 Mg on the left side so that it becomes 2 Mg and 2 O on the left side
i.e,
Here it has 2 Mg & 2 O on the left side and 2 Mg and 2 O on the right side and the Chemical equation is Balanced.
Correct Answer: Option 1
Explanation:
;
So formula of compound is
i.e., .
Correct Answer: 743 nm
Explanation:
.
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