Start learning →

State PSC Science & Technology — practice questions — page 8

Explore 311 free Science & Technology questions in State PSC Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise Science & Technology with Quill →

Science & Technology questions and exercises with answers

Showing questions 211–240 of 311.

In pasteurisation, milk is heated to about 70 degrees Celsius for how long before sudden chilling?Read the answer and worked solution →Rhizobium fixes nitrogen while living in the root nodules of:Read the answer and worked solution →Our atmosphere contains about what share of nitrogen gas?Read the answer and worked solution →Catch the viral diseasesRead the answer and worked solution →Pop the food preserversRead the answer and worked solution →Run the microbe milestonesRead the answer and worked solution →Slice the microbe wordsRead the answer and worked solution →Friend or foeRead the answer and worked solution →Sort the disease causesRead the answer and worked solution →Type the numberRead the answer and worked solution →Microorganisms bingoRead the answer and worked solution →People were nomadic, wandering in search of food, until about:Read the answer and worked solution →Plants of the same kind cultivated at one place on a large scale are called a:Read the answer and worked solution →Crops sown in the rainy season, June to September, are called:Read the answer and worked solution →Wheat, gram, pea and mustard grown from October to March are:Read the answer and worked solution →Paddy is grown only in the rainy season because it:Read the answer and worked solution →The process of loosening and turning the soil is called:Read the answer and worked solution →Big clumps of soil in a ploughed field are called:Read the answer and worked solution →Damaged seeds float on water because they:Read the answer and worked solution →Which tool sows seeds uniformly at equal distance and depth and covers them with soil?Read the answer and worked solution →Seeds of which crop are first grown in a nursery and then transplanted?Read the answer and worked solution →Manure is an organic substance obtained from:Read the answer and worked solution →Urea, ammonium sulphate, super phosphate and potash are examples of:Read the answer and worked solution →NPK in fertilisers stands for nitrogen, phosphorus and:Read the answer and worked solution →Growing legumes one season and wheat the next replenishes soil nitrogen. This practice is:Read the answer and worked solution →Plants contain nearly what share of water?Read the answer and worked solution →Moat, chain pump, dhekli and rahat are traditional methods of:Read the answer and worked solution →Which irrigation method sprinkles water like rain and suits uneven land and coffee plantations?Read the answer and worked solution →Which irrigation system delivers water drop by drop near roots and is best for fruit plants?Read the answer and worked solution →2,4-D is an example of a:Read the answer and worked solution →

Worked practice questions

In pasteurisation, milk is heated to about 70 degrees Celsius for how long before sudden chilling?

  1. 1 to 2 days
  2. 15 to 30 seconds
  3. 15 to 30 minutes
  4. 2 to 3 hours
Show answer and solution

Correct answer: B. 15 to 30 seconds

1. It kills harmful microbes. 2. Heating lasts 15 to 30 seconds. 3. Louis Pasteur discovered the process. _Source: syllabus Science, Chapter 2, Microorganisms: Friend and Foe._

Open this question →

Rhizobium fixes nitrogen while living in the root nodules of:

  1. Fruit bearing trees
  2. Grassland weeds
  3. Leguminous plants
  4. Cereal grain crops
Show answer and solution

Correct answer: C. Leguminous plants

1. Beans and peas are examples. 2. Rhizobium lives in legume root nodules. 3. The relationship is symbiotic. _Source: syllabus Science, Chapter 2, Microorganisms: Friend and Foe._

Open this question →

Our atmosphere contains about what share of nitrogen gas?

  1. 21 per cent
  2. 50 per cent
  3. 95 per cent
  4. 78 per cent
Show answer and solution

Correct answer: D. 78 per cent

1. Plants cannot take it directly. 2. Nitrogen is 78 per cent of air. 3. Bacteria fix it into compounds. _Source: syllabus Science, Chapter 2, Microorganisms: Friend and Foe._

Open this question →

How to practise

  1. Choose a Science & Technology question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Science topics

Current AffairsEnvironment & EcologyAgricultureIndian EconomyIndian GeographyMinerals & IndustriesBiotechnologyIndian Society