General Science Practice Question and Answer
8 Q: Amphoteric oxide is-
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63bd21ef74eba5069d47d79a- 1aluminumfalse
- 2zinc oxidefalse
- 3Both A and Btrue
- 4None of thesefalse
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Answer : 3. "Both A and B"
Explanation :
An amphoteric oxide is a type of oxide that can act as both an acid and a base. This means it can react with both acids and bases, either accepting or donating protons (H⁺ ions) depending on the pH of the solution. Amphoteric oxides exhibit this dual behavior because they have both acidic and basic properties. Aluminum oxide (Al₂O₃) and zinc oxide (ZnO) are examples of common amphoteric oxides.
Q: Metals are electropositive elements because-
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63bd219c8f5b1f774c439c68- 1They themselves convert into cations by donating electrons to non-metals.true
- 2They convert themselves into cations by taking electrons from metals.false
- 3metal is reactivefalse
- 4All of the abovefalse
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Answer : 1. "They themselves convert into cations by donating electrons to non-metals."
Explanation :
Metals are electropositive elements because they tend to lose electrons easily. In chemical reactions, metals readily give away their outer electrons to form positive ions, making them good conductors of electricity and heat. This electron loss leads to the formation of cations, which contribute to the electropositive nature of metals.
Q: Which of the following shows the correct relationship?
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63bd214e74eba5069d47d5d1- 11 volt = 1 joule x 1 coulombfalse
- 21 volt = 1 joule / 1 coulombtrue
- 31 volt = 1 coulomb/1 joulefalse
- 41 volt = 1 joule / 1 coulombfalse
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Answer : 2. "1 volt = 1 joule / 1 coulomb"
Explanation :
1 volt = 1 joule / 1 coulomb
This equation represents the definition of voltage (in volts). It states that one volt is equal to one joule of energy per one coulomb of charge. Voltage measures the electric potential difference between two points and is a fundamental concept in electrical physics.
Q: A copper disc has a circular hole in the center when the copper disc is heated then the diameter of the hole is-
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63bd205d3d35cd0deed357c8- 1will remain the samefalse
- 2will decreasetrue
- 3will increasefalse
- 4will depend on other factorsfalse
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Answer : 2. "will decrease"
Explanation :
When a copper disc with a circular hole in the center is heated, the diameter of the hole will generally increase. This phenomenon occurs due to the expansion of the copper material as it is heated. When a material is heated, its particles gain energy and move more vigorously, leading to an increase in volume, and consequently, an increase in the diameter of the hole and the entire disc. The exact amount of expansion would depend on factors such as the temperature increase and the material properties of copper.
Q: The indigenously made Atmospheric Water Generator (AWG) by which Navratna company can make water from the moisture in the atmosphere?
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63bd1ffb61d62119f1d2be87- 1Gail India Limitedfalse
- 2Bharat Electronics Limitedtrue
- 3Bharat Heavy Electronics Limitedfalse
- 4steel authority of Indiafalse
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Answer : 2. "Bharat Electronics Limited"
Q: Seed therapy is used to treat what?
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63bd1f1f61d62119f1d2aa96- 1aidsfalse
- 2tuberculosisfalse
- 3cancertrue
- 4asthmafalse
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Answer : 3. "cancer"
Explanation :
Radiation seed therapy, especially with Cesium-131, is an innovative tool in the fight against cancer.
Q: Due to which behavior of the barometer which measures the atmospheric pressure, "thunderstorm is coming" is predicted?
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63bd1eb174eba5069d47a5d9- 1the barometer reading rises slowlyfalse
- 2the barometer reading slowly goes downfalse
- 3barometer reading rises suddenlyfalse
- 4barometer reading rises suddenlytrue
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Answer : 4. "barometer reading rises suddenly"
Explanation :
A falling barometric pressure, detected by a barometer, signals an approaching thunderstorm. This drop indicates unstable atmospheric conditions, often preceding stormy weather. Meteorologists use barometric readings to predict thunderstorms, as the decrease in pressure signifies the likelihood of imminent weather disturbances and allows for timely weather warnings.
Q: Which gas is filled in the balloons used to get information about weather related changes?
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63bd1e6961d62119f1d29689- 1hydrogenfalse
- 2heliumtrue
- 3oxygenfalse
- 4nitrogenfalse
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Answer : 2. "helium"
Explanation :
Helium: It is an inert gas that is lighter than air. It is non-flammable.