Challenger App

No.1 PSC Learning App

1M+ Downloads
Three products, ____, ____ and ____ are produced in the chlor-alkali process?
Which of the following was a non-violent protest against the British monopoly on salt production in 1930?
The part of an electric motor that reverses the direction of flow of current in it is?
If 5+x , 2x+7 , 6x+9 , and y are in proportion when x=2, find the value of Y.
Gosikhurd National Irrigation Project is related to which of the following States?
Select the correct option for the full form of AIDS?
Soil degradation is one of the major environmental problems faced being faced these days. A wide range of techniques to conserve soil are mentioned below. Select the INCORRECT option.
In Which Organism sex is not determined genetically?
The age of father six years ago is six times the age of his daughter. Three years hence, the father will be thrice as old as his daughter. What is the present age of the daughter?

Which of the following statements is/are true about the principal axis of a spherical mirror?

  1. (i) It is normal to the mirror.
  2. (ii) Point of incidence always lies on the principal axis.
  3. (iii) Principal focus always lies on the principal axis
    The "Mango Showers" phenomena in India is related to which state?
    If 2 is substracted each odd digit and 1 is added to each even digit in the number 83252769, how many digits will occur more than once in the new number thus formed?

    Study the given letter, symbol series and answer the following questions:

    L @ S * E ^ B U # W I < E M @ O S # B * H ! A & L < O

    If we replace each of the vowel with any consonant and similarly if we replace each of the consonants in the original series with any vowel, then how many consonants will be immediately followed by a symbol in the resultant series thus formed?

    Which of the following statement is FALSE?
    In Jainism, the word 'Jain' is derived from the Sanskrit word 'Jina', which means ____ implying one who has transcended all human passions?
    The filament of a bulb is made extremely thin and long in order to achieve?
    Who became the first Indian woman to win a silver medal in the World Wrestling Championships in 2021?
    In economics, the slope of the demand curve is typically?
    The difference in molecular mass between two consecutive homologous series members will be?

    Which of the following types of images can be obtained on a screen?

    1. (a) Real and enlarged
    2. (b) Real and diminished
    3. (c) Virtual and enlarged
    4. (d) Virtual and diminished
      Tropical Evergreen Forests are found in which of the following states of India?
      What part of the respiratory system prevents the air passage from collapsing?
      On 7 March 2022, the Ministry of Women and Child Development (MWCD), in partnership with the Ministry of Education and UNICEF, launched the campaign to bring back out-of-school adolescent girls in India to formal education. The campaign is called?
      If a ray of light is incident passing through the center of curvature of a concave mirror, then the angle between the incident ray and the reflected ray will be equal to?
      Each of P, Q, R, S, T, U and V go to swim on a different day of a week starting from Monday and ending on Sunday of the same week. P goes to swim on Saturday. Exactly three people go to swim between P and U. Exactly two people go to swim between U and T. Exactly two people go to swim between Q and R. Exactly three people go to swim between S and V. Exactly two people go to swim between S and R. When does T go to swim?
      The Periyar River flows in which of the following Indian states?
      In how many languages was the Bal Sahitya Puraskar awarded in 2021?
      In which of the following reactions of respiration is oxygen required?
      What is the name of the indigenously developed High-Speed Expandable Aerial Target System that was successfully flight-tested by the Defence Research and Development Organisation (DRDO) in December 2021?
      Which of the following relations represents the correct mathematical form of Ohm’s law?

      Refer to the following letter, symbol series and answer the question that follows. Counting to be done from left to right only.

      (Left) F & L A V @ * K Z > N E $ B = M U & # T £ G € Z (Right)

      How many such symbols are there each of which are immediately preceded by a letter and also immediately followed by another symbol?

      P, Q, R, U, V and W live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it is numbered 2 and so on till the topmost floor, which is numbered 6. V lives on floor number 5. P lives on a floor above V. Only U lives below R. W lives on an even numbered floor. How many people live below Q?
      In a certain code language, A + B means ‘A is the sister of B’, A – B means ‘A is the father of B’, A x B means ‘A is the brother of B’ and A ÷ B means ‘A is the wife of B’. How is P related to T if ‘P x Q ÷ R – S + T’?
      If ‘A’ stands for ‘÷’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘−’, what will be come in place of question mark ‘?’ in the following equation? 3 B 41 A 3 D 34 C 17 = ?
      Which of the following groups of organisms help in keeping the environment clean?
      In a certain code language, ‘OWNS’ is coded as ‘4957’ and ‘NEWS’ is coded as ‘9247’. What is the code for ‘E’ in that language?
      RN 13 is related to TM -6 in a certain way. In the same way, LO 9 is related to NN -10. To which of the following is OS 3 related, following the same logic? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
      Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only. (Left) # 9 3 6 9 & & © 9 € 9 8 © 4 $ # 3 4 $ * € £ (Right) How many such symbols are there which are immediately preceded by a number and also immediately followed by a symbol?
      Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? # : LNI :: QSN : %
      Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete? OEK 16 PJN 9 ? RTT −11 SYW −24

      In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Select the set in which the numbers are related in the same way as are the numbers of the following sets. (Note: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

      56, 63.4

      84, 91.4

      Which of the following compounds is/are used in black and white photography?
      29 is related to 30.6 following a certain logic. Following the same logic, 35.2 is related to 36.8. To which of the given options is 32 related to, following the same logic? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
      The Panchayati Raj system was first implemented in which state of India?

      Select the correct mirror image of the given figure when the mirror is placed at MN as shown below.

      image.png
      image.png
      Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

      Identify the figure given in the options which when put in place of the question mark (?) will logically complete the series.

      image.png

      A

      image.png

      B

      image.png

      C

      image.png

      D

      image.png
      A is the daughter of C's sister B. D is the father of C's husband E. How is A related to D?
      This question is based on the following words. PAD SHE NOT WIN If in each of the words, each letter is changed to the next letter in the English alphabetical order, how many words thus formed will have no vowel?
      In a certain code language, ‘inspire others daily’ is written as ‘lo ab ef’ and ‘daily routine matters’ is coded as ‘mo ef tu’. How is ‘daily’ coded in the given language?