Tag: science & technology

Questions Related to science & technology

The boiling temperature of water is much higher than methane because water molecules are:
general knowledge science & technology

  1. composed of fewer atoms

  2. more massive

  3. smaller

  4. polar

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Correct Option: D

Are there hydrogen bonds between water molecules in the liquid phase?
general knowledge science & technology

  1. No, and if there were, the water would just be ice (a solid)

  2. Yes, and they are continually breaking and reforming

  3. Yes, but they rarely occur

  4. No, otherwise the water molecules would not be able to tumble over one another

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Correct Option: B

Detergents differ from soaps in that:
general knowledge science & technology

  1. their ionically charged heads are derivatives of sulfur

  2. they can be broken down by microorganisms

  3. detergents are human-made while soaps are produced naturally

  4. detergents are less able to penetrate grease than soaps

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Correct Option: A

A pH of 7 signifies a solution which is:
general knowledge science & technology

  1. basic

  2. salt

  3. acidic

  4. neutral

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Correct Option: D

How many different isomers are possible for a hydrocarbon with the molecular formula C4H10?
general knowledge science & technology

  1. 1

  2. 2

  3. 3

  4. 5

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Correct Option: B

Which of these contains the carbonyl group?
general knowledge science & technology

  1. Ketones

  2. Aldehydes

  3. Esters

  4. All of the above

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Correct Option: D

What is the output of the following: StringBuffer sb1 = new StringBuffer("Amit"); StringBuffer sb2= new StringBuffer("Amit"); String ss1 = "Amit"; System.out.println(sb1==sb2); System.out.println(sb1.equals(sb2)); System.out.println(sb1.equals(ss1)); System.out.println("Poddar".substring(3));
general knowledge science & technology

  1. false false false dar

  2. false true false dar

  3. true true false dar

  4. compile-time error

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Correct Option: A

What is the output of following code: String s1 = new String("java"); String s2 = s1.replace('a','i'); s1.concat("Fundamentals"); System.out.println(s1); System.out.println((s1+s2).charAt(5));
general knowledge science & technology

  1. javaFundamentals u

  2. jivi i

  3. java i

  4. jiviFundamentals u

  5. compile-time error

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Correct Option: C

What will be the result of compiling and running the given program? Select one correct answer. 1 public class exception 2 { 3 public static void main(String args[]) 4 { 5 System.out.println("A"); 6 try 7 { 8 System.out.println("B"); 9 System.exit(0); 9 } 10 catch(Exception e) 11 { 12 System.out.println("C"); 13 } 14 finally 15 { 16 System.out.println("D"); 17 } 18 } 19 }
general knowledge science & technology

  1. Program compiles correctly and prints "A" and "C" when executed

  2. Program compiles correctly and prints "A" when executed

  3. Program compiles correctly and prints "A","B" and "C" when executed

  4. Program compiles correctly and prints "A" and "B" when executed

  5. compile-time error

  6. run-time error

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Correct Option: D

Given the following: class MyThread extends Thread{ public static void main(String [] args){ MyThread t=new MyThread(); Thread x=new Thread(t); x.start(); public void run(){ for(int i=0;i<3;++i) System.out.print(i+”..”); } } } what is the result of above code?
general knowledge science & technology

  1. compile-time error

  2. run-time error

  3. 0..1..2..

  4. 0..1..2..3..

  5. 1..2..3..

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Correct Option: A