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8प्र: When Ionic bonds are formed metallic atoms tend to 2842 05b5cc697e4d2b4197774c5a5
5b5cc697e4d2b4197774c5a5- 1share electronsfalse
- 2gain electronsfalse
- 3lose electronstrue
- 4None of abovefalse
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उत्तर : 3. "lose electrons"
व्याख्या :
Answer: C) lose electrons Explanation: Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion. Hence, when Ionic bonds are formed metallic atoms tend to lose electrons and become positive ions
प्र: Read the following information carefully and answer the questions given below it. There are five men A,B,C,D and E and six women P, Q, R, S, T and U. A, B and R are advocates, C, D, P, Q and S are doctors and the rest are teachers. Some teams are to be selected from amongst these eleven persons subject to the following conditions. A, P and U have to be together. B cannot go with D or R. E and Q have to be together. C and T have to be together. D and P cannot go together. C cannot go with Q. If the team is to consist of two male advocates, two lady doctors and one teacher, the members of team are 2840 05b5cc6f4e4d2b4197774effa
5b5cc6f4e4d2b4197774effa- 1A, P, R, S, Ufalse
- 2A, B, P, Q, Ufalse
- 3B, E, Q, R, Sfalse
- 4A, B, P, U, Strue
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उत्तर : 4. "A, B, P, U, S"
व्याख्या :
Answer: D) A, B, P, U, S Explanation: From the given information; Members Sex Profession A M Advocate Q F Doctor B M Advocate R F Advocate C M Doctor S F Doctor D M Doctor T F Teacher E M Teacher U F Teacher P F Doctor Answer (D) From option (D) A and B are two male advocates, P and S are two female doctors and u is female teacher.
प्र: Which of the following statements is most accurate regarding infection with parvovirus B19? 2836 05b5cc6a8e4d2b4197774ce76
5b5cc6a8e4d2b4197774ce76- 1Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursorstrue
- 2Parvovirus B19 can cause hydrops fetalis via transplacental infection of a fetus in a seropositive motherfalse
- 3Parvovirus B19 can be diagnosed by detection of viral RNA using PCR or hybridization assaysfalse
- 4Parvovirus B19 replicates in the host cell nucleus utilizing a virally encoded DNA polymerase to create a double- stranded DNA intermediatefalse
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उत्तर : 1. "Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors"
व्याख्या :
Answer: A) Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors Explanation: Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors. a. Parvovirus B19 binds preferentially to the erythrocyte blood group P antigen on erythroid precursor cells. Answers B, C, D are incorrect: b. after entry the single-stranded viral DNA genome is transported to the cell nucleus where the host DNA polymerase synthesizes the complimentary DNA strand. c. Parvovirus B19 infection can be diagnosed by direct detection of viral DNA not RNA. d. the fetus of a seropositive mother is protected from infection by maternal circulating antibodies.
प्र: A secret can be told to only 3 persons in 3 minutes. Each person in turn tells 3 other persons in the next 3 minutes and the processes continues accordingly. In 30 minutes how many persons can be told this secret in this way ? 2836 05b5cc741e4d2b4197774f99a
5b5cc741e4d2b4197774f99a- 188572true
- 277854false
- 399584false
- 455654false
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उत्तर : 1. "88572"
व्याख्या :
Answer: A) 88572 Explanation: Given a secret is told to 3 persons in 3 minutes.And if the process continues with each person saying 3 other persons,In 30 minutes => the rocess for 10 times because each person time is 3 minutes.Required number of persons = 3 + 32 + 33 + .... + 39 + 310 Now it forms a geometric progression, Sum to n terms is S = arn - 1r - 1 Here a = 3, r = 3 => 59048 x 3 /2 = 88572.
प्र: Find the next number in the given series 0.25, 8, 128, 1024, ? 2835 05b5cc6bce4d2b4197774d8b1
5b5cc6bce4d2b4197774d8b1- 14096true
- 22526false
- 38486false
- 42620false
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उत्तर : 1. "4096"
व्याख्या :
Answer: A) 4096 Explanation: Here given series follows a pattern that 0.25, 8, 128, 1024, ? 0.25 x 32 = 8 8 x 16 = 128 128 x 8 = 1024 1024 x 4 = 4096
प्र: I jump when i walk and sit when i stand, who am I? 2834 05b5cc6a0e4d2b4197774ca65
5b5cc6a0e4d2b4197774ca65- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
Kangaroo.
प्र: 25% of 25% Is Equal To 2831 05b5cc6bae4d2b4197774d78a
5b5cc6bae4d2b4197774d78a- 10.0625true
- 20.0210false
- 30.03145false
- 40.3210false
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उत्तर : 1. "0.0625"
व्याख्या :
Answer: A) 0.0625 Explanation: 25% of 25% means 25/100 of 25/100 i.e, 1/4 of 1/4 or in other words 1/4 x 1/4=1/16 Hence, the answer is 1/16 = 0.0625.
प्र: Which of the following statements about Woodrow Wilson is true? 2830 05b5cc60de4d2b4197774b613
5b5cc60de4d2b4197774b613- 1He wanted to place strict government controls on corporations.true
- 2He overturned discriminatory laws against African Americans.false
- 3He advocated eliminating the income tax.false
- 4He opposed reforms to the banking system.false
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उत्तर : 1. "He wanted to place strict government controls on corporations."
व्याख्या :
Answer: A) He wanted to place strict government controls on corporations. Explanation: Woodrow Wilson was one of the major "Progressives" in American government and so 'He wanted to place strict government controls on corporations.'