Discussion
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- Question
Dimond is
Options- A. an element
- B. a compound
- C. a mixture
- D. a liquid
- Correct Answer
- an element
- 1. Milk is a
Options- A. mixture
- B. element
- C. metal
- D. None of these Discuss
- 2. Number of moles of solute present in 1 litre of solution is
Options- A. Normality
- B. Molarity
- C. Molality
- D. Formality Discuss
- 3. Which among the following is the most electronegative element?
Options- A. Flourine
- B. Bromine
- C. Iodine
- D. Oxygen Discuss
- 4. Formation of anions occurs by
Options- A. loss of neutrons
- B. gain of protons
- C. gain of electrons
- D. none Discuss
- 5. The alpha-particles are
Options- A. high energy electrons
- B. positively charged hydrogen irons
- C. high energy x ray radiations
- D. double positively charged helium nuclei Discuss
- 6. Stainless steel contains steel and
Options- A. manganese
- B. vanadium
- C. nickel
- D. chromium Discuss
- 7. Dust particles in the air of large industrial cities are removed by
Options- A. Sedimentation
- B. Electrophoresis
- C. Tyndall effect
- D. Brownian movement Discuss
- 8. A mixture of sand and naphthalene can be seperated by __________
Options- A. Fractional distillation
- B. Sublimation
- C. Chromatography
- D. Any of them Discuss
- 9. "If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other". This is a statement of
Options- A. Cyclic rute
- B. Zeroth law of thermodynamics
- C. First law of thermodynamics
- D. Second law of thermodynamics Discuss
- 10. A mixture of ethyl alcohol and water can be seperated by
Options- A. evaporation
- B. sublimation
- C. using a seperating funnel
- D. fractional distillation Discuss
Chemistry problems
Search Results
Correct Answer: mixture
Correct Answer: Molarity
Explanation:
Moles of solute present in 1 litre or 1000ml of solution is called molarity
Correct Answer: Flourine
Explanation:
Flourine is the most electro negative element due to its small atomic radius .It also has the tendency to accept an electron to complete octet configuration
Correct Answer: gain of electrons
Correct Answer: double positively charged helium nuclei
Correct Answer: chromium
Explanation:
Stainless steel contains 18% chromium and 82% steel
Correct Answer: Electrophoresis
Explanation:
Dust particles such as coal dust(smoke) are fine particle of a solid (carbon in the case of smoke) dispersed in air. They are colloidal systems and the particles are charged either positive or negative. In an applied electrical field, they are attracted towards the opposite electrodes. Movement of the particles towards the electrodes is known as 'electrophoresis'. Hence electrophoresis is applied to remove smoke within the chimeny itself without allowing it to escape into the air and cause nuisance.
Correct Answer: Sublimation
Correct Answer: Zeroth law of thermodynamics
Correct Answer: fractional distillation
Explanation:
Fractional distillation is the process of seperation of a mixture of two or more liquids into the different fractions, which differ fairly widely in their boiling points. The liquid with a lower boiling point will be vaporized first and hence would be the distillate (first fraction). Eg. Ethyl alcohol has a boiling point of and water . When a mixture of these two liquids is heated, alcohol vaporizes first and is collected separately as the distillate.
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