Chemistry Practice Question and Answer
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Q: What type of acid is found in curd?
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5f697af5558d255013b2469e- 1lactic acidtrue
- 2citric acidfalse
- 3Oxalic acidfalse
- 4Othersfalse
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Answer : 1. "lactic acid"
Q: What is the pH value of sodium hydroxide?
1059 05f697aa5397b1a52908bfe4f
5f697aa5397b1a52908bfe4f- 111false
- 212false
- 313false
- 414true
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Answer : 4. "14"
Q: Herbs- The decomposition of vegetables into compost is an example of which reaction?
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5f697a52f9079a64e3a50eab- 1endothermicfalse
- 2exothermictrue
- 3substitutionfalse
- 4Amphibianfalse
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Answer : 2. "exothermic"
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: What type of chemical reaction is combustion of natural gas?
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5f6979af558d255013b234b3- 1combination reactionfalse
- 2decomposition reactionfalse
- 3exothermic reactiontrue
- 4dissolution reactionfalse
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Answer : 3. "exothermic reaction"
Q: The general name of the elements of 17th group are
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5f5721e0df171125cbc1ae4f- 1Metalsfalse
- 2Noble gasesfalse
- 3Transition elementsfalse
- 4Halogenstrue
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Answer : 4. "Halogens"
Q: Gold is alloyed with which metal to make it harder?
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5f571a5b79cfd646ddd37291- 1Cfalse
- 2Snfalse
- 3Cutrue
- 4Agfalse
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Answer : 3. "Cu"
Q: Isotopes of an element do not have ______.
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5f571a03c1a5d57a183026b9- 1Same number of electronsfalse
- 2Same number of protonsfalse
- 3Same chemical propertiesfalse
- 4Same physical propertiestrue
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Answer : 4. "Same physical properties"
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