Chemistry Practice Question and Answer
8 Q: Nowadays yellow lamps are being used in abundance in street lights. Which of the following gas are used in these lamps?
1441 05f745b0ff66ef56de842ca1c
5f745b0ff66ef56de842ca1c- 1Sodiumtrue
- 2Neonfalse
- 3Hydrogenfalse
- 4Nitrogenfalse
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Answer : 1. "Sodium"
Q: What is the common name of CaoCl2?
1439 0609e4cd76397877f31963e9f
609e4cd76397877f31963e9f- 1Washing Sodafalse
- 2Bleaching Powdertrue
- 3Baking Powderfalse
- 4Baking Sodafalse
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Answer : 2. "Bleaching Powder "
Q: Which of the following process is used to do maximum work done on the ideal gas if the gas is compressed to half of its initial volume?
1439 063c920deb338bc336f0dd8d6
63c920deb338bc336f0dd8d6- 1Isothermalfalse
- 2Isochoricfalse
- 3Isobaricfalse
- 4Adiabatictrue
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Answer : 4. "Adiabatic"
Q: On heating copper powder in air, a layer of copper oxide accumulates on its surface. What is the color of this layer?
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5f697a06f9079a64e3a50c7f- 1Blacktrue
- 2Whitefalse
- 3Yellowfalse
- 4Brownfalse
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Answer : 1. "Black"
Q:Read the following questions carefully and answer them.
The advantage of detergents over soaps is
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63aaa809afa10611461dc17d- 1Detergents are soluble in waterfalse
- 2Detergents could not give much latherfalse
- 3Detergents give lather even with hard watertrue
- 4Soaps give lather with only soft waterfalse
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Answer : 3. "Detergents give lather even with hard water "
Q: Find the temperature at which the below reaction will be in equilibrium if the enthalpy and entropy change for the reaction is 30 Kj mol-1 and 105 J K-1 mol-1 respectively
Br2(l) + Cl2(g) → 2BrCl(g)
1435 063c922a87efeed32fc213a76
63c922a87efeed32fc213a76Br2(l) + Cl2(g) → 2BrCl(g)
- 1273 Kfalse
- 2300 Kfalse
- 3450 Kfalse
- 4285.7 Ktrue
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Answer : 4. "285.7 K"
Q: Hydrogen resembles the properties of which two groups of the periodic table?
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64a2b0fac7d7c7e0674a2640- 1Group 2 and Group 17false
- 2Group 1 and Group 3false
- 3Group 1 and Group 17true
- 4Group 2 and Group 4false
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Answer : 3. "Group 1 and Group 17"
Explanation :
1. Hydrogen matches the properties of the first group and seventh group of the periodic table.
2. Following is some additional information about the properties of hydrogen.
- Hydrogen is a highly flammable gas.
-Hydrogen is a major component of water.
- Hydrogen can be used as fuel.
Hydrogen is used in the chemical industry to make many types of products.
Q: Sodium chloride and water are formed by the reaction of sodium hydroxide and hydrochloric acid. What is this reaction?
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5f698f9a558d255013b2b659- 1neutralizationtrue
- 2Disintegrationfalse
- 3combinationfalse
- 4precipitationfalse
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