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Showing posts with the label General Science GK

10 Facts About Earth

Top 10 Interesting Facts About Mother EarthLets learn 10 interesting facts about mother earth...
1. Earth is the 3rd planet from the Sun.
2. About 2/3 of the mother earth is covered by water.
3. Age of planet earth is about 4.5 billion years.
4. Earth has a moon, which orbiting earth and completes one cycle in a month.
5. Earth is home to millions of species including humans and support life.
6. Earth has an atmosphere containing about 21% oxygen.7. Earth is the only planet in the solar system that has life.8. Earth orbit around sun, and completes one cycle in 365¼ days.9. Earth is at 150 million kilometers from the sun.10. Earth is NOT an exact sphere, the diameter around the equator is slightly larger than the diameter around the north and south poles.

Analytical Balance

Analytical BalanceWhat is an analytical balance? Analytical balance is a lab-instrument used to determine mass of any matter very precisely. These analytical balances are very sensitive and expensive lab-instruments, and also upon the accuracy and precision of analytical balance the accuracy of lab-analysis result depends so handle these balances very carefully. Generally used analytical balances are balances with the capacity of 100 gram to 200 gram and the sensitivity of 0.1 milligram to 0.001 milligram. For any quantitative chemical analysis there is need of analytical balance for the weighing of sample for analysis and weighing of reagents for solution preparation. Analytical balance pan used to put sample on it is enclosed in a glass-fitted case, means analytical balance sensitivity requires that it to be protected by the draft shield or enclosure.
Definition of Analytical BalanceAnalytical balance is a lab instrument with a scale to measure the mass to a high degree of precision.…

Chemical Reaction Quiz Part16

Chemical Reaction QuizScience Quizby www.ChemistryNotesInfo.comThis Chemical Reaction Quiz part16 is based on chemical reactions. 1. Chemical reaction always gives-Reactants
A change of state
A different substance
Water
All of the above
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2. From given below, 4-balanced chemical equations, which is example of combustion reaction-2Mg + O2 → 2MgO
2N2 + 3H2 → 2NH3
CaO + H2O → Ca(OH)2
2Na + Cl2 → 2NaCl
2CH4 + 4O2 → 2CO2 + 4H2O
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3. To balance a chemical equation, you should need to change-Chemical Formulas
Direction of the arrow
Coefficients
Subscripts
Superscripts
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4. In chemistry, if you try to balance a chemical equation by changing its subscripts, than you change the-Atomic number
Atomic Mass
Mass of the reactants
Number of molecules of product
Identity of the compound
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5. From given below, 4-balanced chemical equations, which is example of double displacement reaction-NH4Cl → NH3 + HCl
Cd(NO3)2 + Na2S → CdS + 2NaNO3
2Mg + O2 → 2MgO
2H2O2 → …

Chemical Reactions Quiz Part15

Chemical Reactions QuizScience Quizby www.ChemistryNotesInfo.comThis Chemical Reactions Quiz part15 is based on chemical reaction. 1. Chemical Reaction, 2H₂O → 2H₂ + O₂ is a-Synthesis Reaction
Decomposition Reaction
Combustion Reaction
Single Displacement Reaction
Double Displacement Reaction
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2. Chemical Reaction, 8Fe + S₈ → 8FeS is a-Synthesis Reaction
Decomposition Reaction
Combustion Reaction
Single Displacement Reaction
Double Displacement Reaction
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3. Chemical Reaction, Zn + H₂SO₄ → ZnSO₄ + H₂ is a-Synthesis Reaction
Decomposition Reaction
Combustion Reaction
Single Displacement Reaction
Double Displacement Reaction
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4. Chemical Reaction, AgNO₃ + NaCl → AgCl + NaNO₃ is a-Synthesis Reaction
Decomposition Reaction
Combustion Reaction
Single Displacement Reaction
Double Displacement Reaction
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5. Chemical Reac…

Science Quiz Part14

Science Quiz on Measuring DevicesScience Quizby www.ChemistryNotesInfo.comThis Science Quiz part14 is based on different measuring devices or measuring instruments used in the field of Science. 1. Distance traveled, displacement is measured by:Taxmeter
Taximeter
Distancemeter
Displacementmeter
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2. Surface tension of the liquid is measured by:Tacheometer
Tintometer
Tensiometer
Tachometer
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3. Temperature is measured by:Thermometer
Thermusmeter
Hygrometer
Hydrometer
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4. Ultraviolet light is measured by:EW Meter
Electromagnetic Wave Meter
UV Meter
VU Meter
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5. Very low pressure is measured by:Pressure Meter
Voltmeter
Viscometer
Vacuum Gauge
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6. Viscosity of a fluid is measured by:Viscosity Meter
Viscometer
Ostwald Viscometer Principle
Viscosity Measurement Devices
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7. Electric potential, voltage is measured by:Voltmeter
Digital DC Voltmeter
Analog Panel Voltmeter
Ammeter
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8. Electrical power is measured by:Ammeter
Wattmeter
Voltmeter
Voltage…

Science Quiz Part13

Science Quiz on Measuring DevicesScience Quizby www.ChemistryNotesInfo.comThis Science Quiz part13 is based on different measuring devices or measuring instruments used in the field of Science. 1. Color is measured by:Tintometer
Color Meter
Color Identification Devices
Color Measuring Instrument
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2. Speed, velocity of the vehicle is measured by:Speed Detector
Speed Tester
Speedometer
None of the above
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3. Lung capacity is measured by:ECG Machine
Sphygmomanometers
Stethoscopes
Spirometer
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4. Blood pressure is measured by:Digital Blood Pressure Monitor
Clinical Thermometers
Glucometer
Sphygmomanometer
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5. Radius of a sphere is measured by:Ruler
Spherometer
Diameter
Scale
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6. Object range is measured by:Stadimeter
Kilometer
Milimeter
Meter
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7. Seismic strain is measured by:Science Quiz
Strainmetere
Refractometer
Seismicmeter
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8. Standing wave ratio is measured by:Radiometer
SWR Meter
Wave Ratio Meter
Electrometer
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9. Distance is mea…

Science Quiz Part12

Science Quiz on Measuring DevicesChemistry GKby www.ChemistryNotesInfo.comThis Science Quiz part12 is based on different measuring devices or measuring instruments used in the field of Science.
1. Intensity of the light as a function of the wavelength is measured by:Spectrometer
Spectrophotometer
Spectroscopy
Color Spectrophotometer
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2. Properties of light is measured by:Spectrometer
Spectrophotometer
Spectroscopy
Color Spectrophotometer
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3. Seismic waves (during earthquakes) is measured by:Seismic Waves Meter
Surface Buoys
Seismometer
Underwater Sensors
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4. Amount of the sugar in a solution is measured by:Saccharometer
Sugar Meter
Glucometer
Sugar Tester
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5. Length is measured by:Ruler
Insurance
Classes
Degree
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6. Response to applied forces is measured by:Watt-hour meter
Q meter
Rheometer
Rotameter
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7. Sugar concentration of the sap & syrup is measured by:Hygrometer
RF/Microwave
Refractometer
Hydrometer
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8. Radiant flux of the elec…

Branches of Chemistry



Chemistry is branch of Science, which is further divided into many branches like-

Chemistry GK