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- Question
Who is the father of modern chemistry?
Options- A. Priestley
- B. Lavoisier
- C. Dalton
- D. Mendeleeff
- Correct Answer
- Lavoisier
- 1. The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ?
Options- A. 4th
- B. 2nd
- C. 3rd
- D. 1st Discuss
- 2. Positive ions are formed from neutral atoms by loss of
Options- A. neutrons
- B. protons
- C. nuclear charge
- D. electrons Discuss
- 3. The difference between a nuclear reactor and atomic bomb is that ___________
Options- A. no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
- B. the chain reaction in nuclear reactor is controlled
- C. the chain reaction in nuclear reactor is not controlled
- D. no-chain reaction takes place in atomic bomb while it takes place in nuclear reactor Discuss
- 4. The crop that has the highest photosynthetic activity -
Options- A. Sugarcane
- B. Wheat
- C. Cotton
- D. Rice Discuss
- 5. 1 Mole of CO2 mass is
Options- A. 32 gms
- B. 44 gms
- C. 16 gms
- D. 12 gms Discuss
- 6. Atoms Are Composed Of
Options- A. Electrons and Protons
- B. Protons and Nuclei
- C. Only Electrons
- D. Electrons and Nuclei Discuss
- 7. The outer electron configuration of Gd (Atomic No : 64) is 1. 4f75d16s2 2. 4f35d56s2 3. 4f85d06s2 4. 4f45d46s2 Discuss
- 8. Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides? (1) K2O
Options- A. Option 1
- B. Option 2
- C. Option 3
- D. Option 4
Discuss
Correct Answer: Option 2
Explanation:
While moving from left to right in periodic table basic character of oxide of elements will decrease.
and while descending in the group basic character of corresponding oxides increases.
- 9. Which one of the following is used to induce artificial rain ?
Options- A. Potassium Nitrate
- B. Ammonium chloride
- C. Calcium carbonate
- D. Silver lodide Discuss
- 10. Which of the following is also known as Carbolic Acid?
Options- A. Hydroxide
- B. Sulphuric Acid
- C. Ethanol
- D. Phenol Discuss
Chemistry problems
Search Results
Correct Answer: 2nd
Explanation:
RNA has hydroxy group attached at the 2nd C-atom while DNA does not.
Correct Answer: electrons
Correct Answer: the chain reaction in nuclear reactor is controlled
Correct Answer: Sugarcane
Explanation:
Corn, sugar cane, and sorghum are C4 plants. These plants are economically important in part because of their relatively high photosynthetic efficiencies compared to many other crops.
Correct Answer: 44 gms
Explanation:
We know that,
Mass of Carbon = 12 gms
Mass of Oxygen = 16 gms = O2 => 16 * 2 = 32 gms
=> Mass of 1 mole of CO2 = 12 + 32 = 44 gms.
Correct Answer: Electrons and Nuclei
Explanation:
Atoms are composed of Electrons, protons and Neutrons. Protons and Neutrons together called as Nuclei.
Correct Answer: : 1 Sol : 1 4f75d16s2
Correct Answer: Silver lodide
Correct Answer: Phenol
Explanation:
Phenol with a molecular formula [C6H5OH] is also called as Carbolic Acid. It is a white poisonous clear compound with sweet smell. It is used in making plastics, detergents and drugs.
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