GK Practice Question and Answer
8 Q: Which one is the first heart sound?
879 063c8f9eb8731ac33279f097b
63c8f9eb8731ac33279f097b- 1Lub during closure semilunar valvesfalse
- 2Lub during closure of atrio-ventricular valvestrue
- 3Dub during closure of atrio- ventricular valvesfalse
- 4Dub during closure of semilunarvalevesfalse
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Answer : 2. "Lub during closure of atrio-ventricular valves"
Q: Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?
809 063c8f9528731ac33279f0648
63c8f9528731ac33279f0648- 1To increase the concentration of NO3- ionsfalse
- 2To increase the solubility product of AgClfalse
- 3It increases the precipitation of AgClfalse
- 4For the decomposition of Na2S AND NaCN formedtrue
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Answer : 4. "For the decomposition of Na2S AND NaCN formed"
Q: Which of the following methods is best suited for the separation of a mixture containing naphthalene and benzoic acid
949 063c8f8d3bdbddb32fda0eb03
63c8f8d3bdbddb32fda0eb03- 1Crystallizationfalse
- 2Chromatographyfalse
- 3Sublimationtrue
- 4Distillationfalse
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Answer : 3. "Sublimation"
Q: A wire loop is rotated in a magnetic field such that the frequency of change of direction of the induced emf is
788 063c8dfd58731ac33279e451b
63c8dfd58731ac33279e451b- 1Six times per revolutionfalse
- 2Four times per revolutionfalse
- 3Twice per revolutiontrue
- 4Once per revolutionfalse
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Answer : 3. "Twice per revolution"
Q: Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance?
947 063c8df46bdbddb32fda053ad
63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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Answer : 2. "3 times "
Q: What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?
674 063c8d8afbd6d90332091d175
63c8d8afbd6d90332091d175- 11:4false
- 21:2true
- 32:1false
- 41:1false
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Answer : 2. "1:2"
Q: Consider copper and aluminum wire whose length and resistance are the same. Also, the specific resistance of aluminum is more than copper. Select the correct statement
999 063c8d853b338bc336f0c3de7
63c8d853b338bc336f0c3de7- 1Copper and aluminum mass are the samefalse
- 2Copper wire has more mass than the aluminum wirefalse
- 3Copper wire has less mass than the aluminum wirefalse
- 4The information given is incompletetrue
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Answer : 4. "The information given is incomplete "
Q: Which of the following consists of the exchange part of the respiratory system?
744 063c8d792bdbddb32fda020a6
63c8d792bdbddb32fda020a6- 1From external nostrils up to the alveolifalse
- 2From external nostrils to terminal bronchiolesfalse
- 3From trachea to terminal bronchiolesfalse
- 4Alveoli and their ductstrue
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